Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

On Tue, Jun 19, 2018 at 6:34 PM, John Hubbard wrote: > On 06/19/2018 06:24 PM, Dan Williams wrote: >> On Tue, Jun 19, 2018 at 11:11 AM, John Hubbard wrote: >>> On 06/19/2018 03:41 AM, Jan Kara wrote: >>>> On Tue 19-06-18 02:02:55, Matthew Wilcox wrote: >>&g

Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

On Tue, Jun 19, 2018 at 11:11 AM, John Hubbard wrote: > On 06/19/2018 03:41 AM, Jan Kara wrote: >> On Tue 19-06-18 02:02:55, Matthew Wilcox wrote: >>> On Tue, Jun 19, 2018 at 10:29:49AM +0200, Jan Kara wrote: [..] >> And then there's the aspect that both these approaches are a bit too >>

Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

On Tue, Jun 19, 2018 at 11:11 AM, John Hubbard wrote: > On 06/19/2018 03:41 AM, Jan Kara wrote: >> On Tue 19-06-18 02:02:55, Matthew Wilcox wrote: >>> On Tue, Jun 19, 2018 at 10:29:49AM +0200, Jan Kara wrote: [..] >> And then there's the aspect that both these approaches are a bit too >>

[PATCH v3 1/8] mm, devm_memremap_pages: Mark devm_memremap_pages() EXPORT_SYMBOL_GPL

structure reference counting relative to get_user_pages() and get_user_pages_fast(). It was an oversight that this was not marked EXPORT_SYMBOL_GPL from the outset. Cc: Michal Hocko Cc: "Jérôme Glisse" Reviewed-by: Christoph Hellwig Signed-off-by: Dan Williams --- kernel/memremap.c |

[PATCH v3 1/8] mm, devm_memremap_pages: Mark devm_memremap_pages() EXPORT_SYMBOL_GPL

structure reference counting relative to get_user_pages() and get_user_pages_fast(). It was an oversight that this was not marked EXPORT_SYMBOL_GPL from the outset. Cc: Michal Hocko Cc: "Jérôme Glisse" Reviewed-by: Christoph Hellwig Signed-off-by: Dan Williams --- kernel/memremap.c |

[PATCH v3 4/8] mm, devm_memremap_pages: Add MEMORY_DEVICE_PRIVATE support

In preparation for consolidating all ZONE_DEVICE enabling via devm_memremap_pages(), teach it how to handle the constraints of MEMORY_DEVICE_PRIVATE ranges. Cc: Christoph Hellwig Cc: "Jérôme Glisse" Reported-by: Logan Gunthorpe Reviewed-by: Logan Gunthorpe Signed-off-by: Da

[PATCH v3 4/8] mm, devm_memremap_pages: Add MEMORY_DEVICE_PRIVATE support

In preparation for consolidating all ZONE_DEVICE enabling via devm_memremap_pages(), teach it how to handle the constraints of MEMORY_DEVICE_PRIVATE ranges. Cc: Christoph Hellwig Cc: "Jérôme Glisse" Reported-by: Logan Gunthorpe Reviewed-by: Logan Gunthorpe Signed-off-by: Da

[PATCH v3 8/8] mm: Fix exports that inadvertently make put_page() EXPORT_SYMBOL_GPL

d-by: John Hubbard Signed-off-by: Dan Williams --- kernel/memremap.c |4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/memremap.c b/kernel/memremap.c index 16141b608b63..ecee37b44aa1 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -330,7 +330,7 @@ EXPORT_

[PATCH v3 3/8] mm, devm_memremap_pages: Fix shutdown handling

Cc: Christoph Hellwig Cc: "Jérôme Glisse" Reported-by: Logan Gunthorpe Signed-off-by: Dan Williams --- drivers/dax/pmem.c| 10 ++ drivers/nvdimm/pmem.c | 18 -- include/linux/memremap.h |7 +-- kernel/memremap.c

[PATCH v3 5/8] mm, hmm: Use devm semantics for hmm_devmem_{add, remove}

() automatically handles allocating node-local memory. Reviewed-by: Christoph Hellwig Cc: "Jérôme Glisse" Cc: Logan Gunthorpe Signed-off-by: Dan Williams --- include/linux/hmm.h |4 -- mm/hmm.c| 127 ++- 2 files changed, 25

[PATCH v3 6/8] mm, hmm: Replace hmm_devmem_pages_create() with devm_memremap_pages()

Christoph Hellwig Cc: "Jérôme Glisse" Cc: Logan Gunthorpe Signed-off-by: Dan Williams --- mm/hmm.c | 198 -- 1 file changed, 26 insertions(+), 172 deletions(-) diff --git a/mm/hmm.c b/mm/hmm.c index d65a9419dbc2..b019d67a6

[PATCH v3 3/8] mm, devm_memremap_pages: Fix shutdown handling

Cc: Christoph Hellwig Cc: "Jérôme Glisse" Reported-by: Logan Gunthorpe Signed-off-by: Dan Williams --- drivers/dax/pmem.c| 10 ++ drivers/nvdimm/pmem.c | 18 -- include/linux/memremap.h |7 +-- kernel/memremap.c

[PATCH v3 5/8] mm, hmm: Use devm semantics for hmm_devmem_{add, remove}

() automatically handles allocating node-local memory. Reviewed-by: Christoph Hellwig Cc: "Jérôme Glisse" Cc: Logan Gunthorpe Signed-off-by: Dan Williams --- include/linux/hmm.h |4 -- mm/hmm.c| 127 ++- 2 files changed, 25

[PATCH v3 6/8] mm, hmm: Replace hmm_devmem_pages_create() with devm_memremap_pages()

Christoph Hellwig Cc: "Jérôme Glisse" Cc: Logan Gunthorpe Signed-off-by: Dan Williams --- mm/hmm.c | 198 -- 1 file changed, 26 insertions(+), 172 deletions(-) diff --git a/mm/hmm.c b/mm/hmm.c index d65a9419dbc2..b019d67a6

[PATCH v3 8/8] mm: Fix exports that inadvertently make put_page() EXPORT_SYMBOL_GPL

d-by: John Hubbard Signed-off-by: Dan Williams --- kernel/memremap.c |4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/memremap.c b/kernel/memremap.c index 16141b608b63..ecee37b44aa1 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -330,7 +330,7 @@ EXPORT_

[PATCH v3 7/8] mm, hmm: Mark hmm_devmem_{add, add_resource} EXPORT_SYMBOL_GPL

Reviewed-by: Christoph Hellwig Signed-off-by: Dan Williams --- mm/hmm.c |4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/hmm.c b/mm/hmm.c index b019d67a610e..481a7a5f6f46 100644 --- a/mm/hmm.c +++ b/mm/hmm.c @@ -1054,7 +1054,7 @@ struct hmm_devmem *hmm_devmem_add(co

[PATCH v3 7/8] mm, hmm: Mark hmm_devmem_{add, add_resource} EXPORT_SYMBOL_GPL

Reviewed-by: Christoph Hellwig Signed-off-by: Dan Williams --- mm/hmm.c |4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/hmm.c b/mm/hmm.c index b019d67a610e..481a7a5f6f46 100644 --- a/mm/hmm.c +++ b/mm/hmm.c @@ -1054,7 +1054,7 @@ struct hmm_devmem *hmm_devmem_add(co

[PATCH v3 0/8] mm: Rework hmm to use devm_memremap_pages and other fixes

_devmem_pages_create(). Rework HMM to be a consumer of devm_memremap_pages() directly and fix up the licensing on the exports given the deep dependencies on the mm. Patches based on v4.18-rc1 where there are no upstream consumers of the HMM functionality. --- Dan Williams (8): mm, devm_

[PATCH v3 2/8] mm, devm_memremap_pages: Kill mapping "System RAM" support

error. Cc: Christoph Hellwig Cc: "Jérôme Glisse" Cc: Logan Gunthorpe Signed-off-by: Dan Williams --- kernel/memremap.c |9 +++-- 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/kernel/memremap.c b/kernel/memremap.c index 4478e4688bb7..2d2c901cbe23 100644 --

[PATCH v3 2/8] mm, devm_memremap_pages: Kill mapping "System RAM" support

error. Cc: Christoph Hellwig Cc: "Jérôme Glisse" Cc: Logan Gunthorpe Signed-off-by: Dan Williams --- kernel/memremap.c |9 +++-- 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/kernel/memremap.c b/kernel/memremap.c index 4478e4688bb7..2d2c901cbe23 100644 --

[PATCH v3 0/8] mm: Rework hmm to use devm_memremap_pages and other fixes

_devmem_pages_create(). Rework HMM to be a consumer of devm_memremap_pages() directly and fix up the licensing on the exports given the deep dependencies on the mm. Patches based on v4.18-rc1 where there are no upstream consumers of the HMM functionality. --- Dan Williams (8): mm, devm_

Re: [PATCH v3 1/2] acpi/nfit: Update nfit driver to comply with ACPI 6.1

On Mon, Jun 18, 2018 at 2:37 PM, Elliott, Robert (Persistent Memory) wrote: > > >> -Original Message----- >> From: Dan Williams [mailto:dan.j.willi...@intel.com] >> Sent: Monday, June 18, 2018 2:47 PM >> To: Kani, Toshi >> Cc: linux-kernel@vger.kernel.o

Re: [PATCH v3 1/2] acpi/nfit: Update nfit driver to comply with ACPI 6.1

On Mon, Jun 18, 2018 at 2:37 PM, Elliott, Robert (Persistent Memory) wrote: > > >> -Original Message----- >> From: Dan Williams [mailto:dan.j.willi...@intel.com] >> Sent: Monday, June 18, 2018 2:47 PM >> To: Kani, Toshi >> Cc: linux-kernel@vger.kernel.o

Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

On Mon, Jun 18, 2018 at 12:31 PM, Jason Gunthorpe wrote: > On Mon, Jun 18, 2018 at 12:21:46PM -0700, Dan Williams wrote: >> On Mon, Jun 18, 2018 at 11:14 AM, John Hubbard wrote: >> > On 06/18/2018 10:56 AM, Dan Williams wrote: >> >> On Mon, Jun 18, 2018 at 10:50

Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

On Mon, Jun 18, 2018 at 12:31 PM, Jason Gunthorpe wrote: > On Mon, Jun 18, 2018 at 12:21:46PM -0700, Dan Williams wrote: >> On Mon, Jun 18, 2018 at 11:14 AM, John Hubbard wrote: >> > On 06/18/2018 10:56 AM, Dan Williams wrote: >> >> On Mon, Jun 18, 2018 at 10:50

Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

On Mon, Jun 18, 2018 at 11:14 AM, John Hubbard wrote: > On 06/18/2018 10:56 AM, Dan Williams wrote: >> On Mon, Jun 18, 2018 at 10:50 AM, John Hubbard wrote: >>> On 06/18/2018 01:12 AM, Christoph Hellwig wrote: >>>> On Sun, Jun 17, 2018 at 01:28:18PM -0700, John Hub

Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

On Mon, Jun 18, 2018 at 11:14 AM, John Hubbard wrote: > On 06/18/2018 10:56 AM, Dan Williams wrote: >> On Mon, Jun 18, 2018 at 10:50 AM, John Hubbard wrote: >>> On 06/18/2018 01:12 AM, Christoph Hellwig wrote: >>>> On Sun, Jun 17, 2018 at 01:28:18PM -0700, John Hub

Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

On Mon, Jun 18, 2018 at 10:50 AM, John Hubbard wrote: > On 06/18/2018 01:12 AM, Christoph Hellwig wrote: >> On Sun, Jun 17, 2018 at 01:28:18PM -0700, John Hubbard wrote: >>> Yes. However, my thinking was: get_user_pages() can become a way to >>> indicate that >>> these pages are going to be

Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

On Mon, Jun 18, 2018 at 10:50 AM, John Hubbard wrote: > On 06/18/2018 01:12 AM, Christoph Hellwig wrote: >> On Sun, Jun 17, 2018 at 01:28:18PM -0700, John Hubbard wrote: >>> Yes. However, my thinking was: get_user_pages() can become a way to >>> indicate that >>> these pages are going to be

Re: linux-next: build failure after merge of the xarray tree

On Sun, Jun 17, 2018 at 8:27 PM, Stephen Rothwell wrote: > Hi all, > > After merging the xarray tree, today's linux-next build (powerpc > ppc64_defconfig) failed like this: > > In file included from arch/powerpc/include/asm/bug.h:128:0, > from include/linux/bug.h:5, >

Re: linux-next: build failure after merge of the xarray tree

On Sun, Jun 17, 2018 at 8:27 PM, Stephen Rothwell wrote: > Hi all, > > After merging the xarray tree, today's linux-next build (powerpc > ppc64_defconfig) failed like this: > > In file included from arch/powerpc/include/asm/bug.h:128:0, > from include/linux/bug.h:5, >

Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

On Sun, Jun 17, 2018 at 1:04 PM, Jason Gunthorpe wrote: > On Sun, Jun 17, 2018 at 12:53:04PM -0700, Dan Williams wrote: >> > diff --git a/mm/rmap.c b/mm/rmap.c >> > index 6db729dc4c50..37576f0a4645 100644 >> > +++ b/mm/rmap.c >> > @@ -1360,6 +1360,8 @@ s

Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

On Sun, Jun 17, 2018 at 1:04 PM, Jason Gunthorpe wrote: > On Sun, Jun 17, 2018 at 12:53:04PM -0700, Dan Williams wrote: >> > diff --git a/mm/rmap.c b/mm/rmap.c >> > index 6db729dc4c50..37576f0a4645 100644 >> > +++ b/mm/rmap.c >> > @@ -1360,6 +1360,8 @@ s

Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

On Sat, Jun 16, 2018 at 6:25 PM, wrote: > From: John Hubbard > > This fixes a few problems that come up when using devices (NICs, GPUs, > for example) that want to have direct access to a chunk of system (CPU) > memory, so that they can DMA to/from that memory. Problems [1] come up > if that

Re: [PATCH 2/2] mm: set PG_dma_pinned on get_user_pages*()

On Sat, Jun 16, 2018 at 6:25 PM, wrote: > From: John Hubbard > > This fixes a few problems that come up when using devices (NICs, GPUs, > for example) that want to have direct access to a chunk of system (CPU) > memory, so that they can DMA to/from that memory. Problems [1] come up > if that

Re: OpenAFS module libafs.ko uses GPL-only symbol '__put_devmap_managed_page'

On Fri, Jun 15, 2018 at 9:43 PM, John Hubbard wrote: > On 06/13/2018 12:51 PM, Dan Williams wrote: >> [ adding Andrew, Christoph, and linux-mm ] >> >> On Wed, Jun 13, 2018 at 12:33 PM, Joe Gorse wrote: >>> Greetings, >>> >>> Please CC answers

Re: OpenAFS module libafs.ko uses GPL-only symbol '__put_devmap_managed_page'

On Fri, Jun 15, 2018 at 9:43 PM, John Hubbard wrote: > On 06/13/2018 12:51 PM, Dan Williams wrote: >> [ adding Andrew, Christoph, and linux-mm ] >> >> On Wed, Jun 13, 2018 at 12:33 PM, Joe Gorse wrote: >>> Greetings, >>> >>> Please CC answers

Re: OpenAFS module libafs.ko uses GPL-only symbol '__put_devmap_managed_page'

[ adding Andrew, Christoph, and linux-mm ] On Wed, Jun 13, 2018 at 12:33 PM, Joe Gorse wrote: > Greetings, > > Please CC answers & comments to this email. Thanks! =) > > Our build is breaking as of > commit e7638488434415aa478e78435cac8f0365737638 > Author: Dan Williams

Re: OpenAFS module libafs.ko uses GPL-only symbol '__put_devmap_managed_page'

[ adding Andrew, Christoph, and linux-mm ] On Wed, Jun 13, 2018 at 12:33 PM, Joe Gorse wrote: > Greetings, > > Please CC answers & comments to this email. Thanks! =) > > Our build is breaking as of > commit e7638488434415aa478e78435cac8f0365737638 > Author: Dan Williams

Re: [PATCH 3/3] x86/mce: Check for alternate indication of machine check recovery on Skylake

On Thu, Jun 7, 2018 at 10:43 AM, Luck, Tony wrote: > On Fri, May 25, 2018 at 02:42:09PM -0700, Tony Luck wrote: >> Currently we just check the "CAPID0" register to see whether the CPU >> can recover from machine checks. >> >> But there are also some special SKUs which do not have all advanced >>

Re: [PATCH 3/3] x86/mce: Check for alternate indication of machine check recovery on Skylake

On Thu, Jun 7, 2018 at 10:43 AM, Luck, Tony wrote: > On Fri, May 25, 2018 at 02:42:09PM -0700, Tony Luck wrote: >> Currently we just check the "CAPID0" register to see whether the CPU >> can recover from machine checks. >> >> But there are also some special SKUs which do not have all advanced >>

Re: [PATCH 0/5] mm: rework hmm to use devm_memremap_pages

On Thu, Jun 7, 2018 at 7:16 AM, Jerome Glisse wrote: [..] > HMM is self contain interface but i doubt i can convince you of that. I agree that HMM is self contained... after it completely subverts the core-mm. It's that deep understanding and working around of core memory management

Re: [PATCH 0/5] mm: rework hmm to use devm_memremap_pages

On Thu, Jun 7, 2018 at 7:16 AM, Jerome Glisse wrote: [..] > HMM is self contain interface but i doubt i can convince you of that. I agree that HMM is self contained... after it completely subverts the core-mm. It's that deep understanding and working around of core memory management

[PATCH v2] x86/spectre_v1: Disable compiler optimizations over array_index_mask_nospec()

ngo Molnar Reported-by: Mark Rutland Acked-by: Mark Rutland Signed-off-by: Dan Williams --- Changes in v2: * drop the barrier() call (Mark) * update the example (Mark) arch/x86/include/asm/barrier.h |2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/include

[PATCH v2] x86/spectre_v1: Disable compiler optimizations over array_index_mask_nospec()

ngo Molnar Reported-by: Mark Rutland Acked-by: Mark Rutland Signed-off-by: Dan Williams --- Changes in v2: * drop the barrier() call (Mark) * update the example (Mark) arch/x86/include/asm/barrier.h |2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/include

Re: [PATCH v3 2/4] libnvdimm: unconditionally deep flush on *sync

d > whether or not DAX would flush CPU caches via dax_flush() in response to > *sync calls. > > Simplify this by making the *sync deep flush always happen, regardless of > the write cache setting of a namespace. The DAX CPU cache flushing will > still be controlled the write_cache s

Re: [PATCH v3 2/4] libnvdimm: unconditionally deep flush on *sync

d > whether or not DAX would flush CPU caches via dax_flush() in response to > *sync calls. > > Simplify this by making the *sync deep flush always happen, regardless of > the write cache setting of a namespace. The DAX CPU cache flushing will > still be controlled the write_cache s

Re: [PATCH 0/5] mm: rework hmm to use devm_memremap_pages

On Tue, Jun 5, 2018 at 5:08 PM, Jerome Glisse wrote: > On Tue, Jun 05, 2018 at 04:06:12PM -0700, Dan Williams wrote: [..] >> I want the EXPORT_SYMBOL_GPL on devm_memremap_pages() primarily for >> development purposes. Any new users of devm_memremap_pages() sho

Re: [PATCH 0/5] mm: rework hmm to use devm_memremap_pages

On Tue, Jun 5, 2018 at 5:08 PM, Jerome Glisse wrote: > On Tue, Jun 05, 2018 at 04:06:12PM -0700, Dan Williams wrote: [..] >> I want the EXPORT_SYMBOL_GPL on devm_memremap_pages() primarily for >> development purposes. Any new users of devm_memremap_pages() sho

Re: [PATCH 0/5] mm: rework hmm to use devm_memremap_pages

On Tue, Jun 5, 2018 at 3:19 PM, Dave Airlie wrote: > On 6 June 2018 at 04:48, Jerome Glisse wrote: >> On Tue, May 29, 2018 at 04:33:49PM -0700, Dan Williams wrote: >>> On Tue, May 29, 2018 at 4:00 PM, Dave Airlie wrote: >>> > On 30 May 2018 at 08:31, Dan Williams

Re: [PATCH 0/5] mm: rework hmm to use devm_memremap_pages

On Tue, Jun 5, 2018 at 3:19 PM, Dave Airlie wrote: > On 6 June 2018 at 04:48, Jerome Glisse wrote: >> On Tue, May 29, 2018 at 04:33:49PM -0700, Dan Williams wrote: >>> On Tue, May 29, 2018 at 4:00 PM, Dave Airlie wrote: >>> > On 30 May 2018 at 08:31, Dan Williams

Re: linux-next: manual merge of the nvdimm tree with the xfs tree

On Fri, Jun 1, 2018 at 6:33 PM, Stephen Rothwell wrote: > Hi Darrick, > > On Fri, 1 Jun 2018 17:59:48 -0700 "Darrick J. Wong" > wrote: >> >> > + if (!dax_enabled) { >> > - pr_debug("VFS (%s): error: dax support not enabled\n", >> > - sb->s_id); >> > +

Re: linux-next: manual merge of the nvdimm tree with the xfs tree

On Fri, Jun 1, 2018 at 6:33 PM, Stephen Rothwell wrote: > Hi Darrick, > > On Fri, 1 Jun 2018 17:59:48 -0700 "Darrick J. Wong" > wrote: >> >> > + if (!dax_enabled) { >> > - pr_debug("VFS (%s): error: dax support not enabled\n", >> > - sb->s_id); >> > +

Re: linux-next: manual merge of the nvdimm tree with the xfs tree

On Fri, Jun 1, 2018 at 1:58 AM, Stephen Rothwell wrote: > Hi Dan, > > Today's linux-next merge of the nvdimm tree got a conflict in: > > drivers/dax/super.c > > between commits: > > ba23cba9b3bd ("fs: allow per-device dax status checking for filesystems") > 80660f20252d ("dax: change

Re: linux-next: manual merge of the nvdimm tree with the xfs tree

On Fri, Jun 1, 2018 at 1:58 AM, Stephen Rothwell wrote: > Hi Dan, > > Today's linux-next merge of the nvdimm tree got a conflict in: > > drivers/dax/super.c > > between commits: > > ba23cba9b3bd ("fs: allow per-device dax status checking for filesystems") > 80660f20252d ("dax: change

Re: [PATCH v2] async_pq: Remove VLA usage

On Wed, May 30, 2018 at 2:33 PM, Kees Cook wrote: > On Tue, May 29, 2018 at 3:40 PM, Dan Williams > wrote: >> [ add Vinod's korg address ] >> >> On Tue, May 29, 2018 at 3:37 PM, Dan Williams >> wrote: >>> [ adding linux-raid ] >>> >>> A

Re: [PATCH v2] async_pq: Remove VLA usage

On Wed, May 30, 2018 at 2:33 PM, Kees Cook wrote: > On Tue, May 29, 2018 at 3:40 PM, Dan Williams > wrote: >> [ add Vinod's korg address ] >> >> On Tue, May 29, 2018 at 3:37 PM, Dan Williams >> wrote: >>> [ adding linux-raid ] >>> >>> A

Re: [PATCH 0/5] mm: rework hmm to use devm_memremap_pages

On Tue, May 29, 2018 at 4:00 PM, Dave Airlie wrote: > On 30 May 2018 at 08:31, Dan Williams wrote: >> On Tue, May 29, 2018 at 3:22 PM, Dave Airlie wrote: >>> >>> On 24 May 2018 at 13:18, Dan Williams wrote: >>> > On Wed, May 23, 2018 at 5:10 PM, Jero

Re: [PATCH 0/5] mm: rework hmm to use devm_memremap_pages

On Tue, May 29, 2018 at 4:00 PM, Dave Airlie wrote: > On 30 May 2018 at 08:31, Dan Williams wrote: >> On Tue, May 29, 2018 at 3:22 PM, Dave Airlie wrote: >>> >>> On 24 May 2018 at 13:18, Dan Williams wrote: >>> > On Wed, May 23, 2018 at 5:10 PM, Jero

Re: [PATCH 0/5] mm: rework hmm to use devm_memremap_pages

On Tue, May 29, 2018 at 3:22 PM, Dave Airlie wrote: > > On 24 May 2018 at 13:18, Dan Williams wrote: > > On Wed, May 23, 2018 at 5:10 PM, Jerome Glisse wrote: > >> On Mon, May 21, 2018 at 03:35:14PM -0700, Dan Williams wrote: > >>> Hi Andrew, ple

Re: [PATCH 0/5] mm: rework hmm to use devm_memremap_pages

On Tue, May 29, 2018 at 3:22 PM, Dave Airlie wrote: > > On 24 May 2018 at 13:18, Dan Williams wrote: > > On Wed, May 23, 2018 at 5:10 PM, Jerome Glisse wrote: > >> On Mon, May 21, 2018 at 03:35:14PM -0700, Dan Williams wrote: > >>> Hi Andrew, ple

Re: [PATCH 2/3 V2] x86/mce: Fix incorrect "Machine check from unknown source" message

On Tue, May 29, 2018 at 11:54 AM, Luck, Tony wrote: > On Tue, May 29, 2018 at 07:53:14PM +0200, Borislav Petkov wrote: [..] > P.S. What happened to my "part 3/3" (updating the Skylake quirk) > ... does that belong in somebody else's tree? I have no qualms taking it through the nvdimm tree with

Re: [PATCH 2/3 V2] x86/mce: Fix incorrect "Machine check from unknown source" message

On Tue, May 29, 2018 at 11:54 AM, Luck, Tony wrote: > On Tue, May 29, 2018 at 07:53:14PM +0200, Borislav Petkov wrote: [..] > P.S. What happened to my "part 3/3" (updating the Skylake quirk) > ... does that belong in somebody else's tree? I have no qualms taking it through the nvdimm tree with

Re: [PATCH] dm: writecache: add DAX dependency

On Mon, May 28, 2018 at 8:38 AM, Arnd Bergmann wrote: > The new dm-writecache driver inconditionally uses the dax > subsystem, leading to link errors in some configurations: > > drivers/md/dm-writecache.o: In function `writecache_ctr': > dm-writecache.c:(.text+0x1fdc): undefined reference to

Re: [PATCH] dm: writecache: add DAX dependency

On Mon, May 28, 2018 at 8:38 AM, Arnd Bergmann wrote: > The new dm-writecache driver inconditionally uses the dax > subsystem, leading to link errors in some configurations: > > drivers/md/dm-writecache.o: In function `writecache_ctr': > dm-writecache.c:(.text+0x1fdc): undefined reference to

[PATCH 0/2] x86/numa_emulation: Introduce uniform split capability

as described by the ACPI HMAT (see 5.2.27.5 Memory Side Cache Information Structure in ACPI 6.2a) See more details in patch2. --- Dan Williams (2): x86/numa_emulation: Fix emulated-to-physical node mapping x86/numa_emulation: Introduce uniform split capability Documentation/x86/x86_64/boot

[PATCH 1/2] x86/numa_emulation: Fix emulated-to-physical node mapping

in" <h...@zytor.com> Cc: Ingo Molnar <mi...@redhat.com> Cc: <x...@kernel.org> Signed-off-by: Dan Williams <dan.j.willi...@intel.com> --- arch/x86/mm/numa_emulation.c |2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/mm/numa_emulation

[PATCH 1/2] x86/numa_emulation: Fix emulated-to-physical node mapping

Without this change the distance table calculation for emulated nodes may use the wrong numa node and report an incorrect distance. Cc: Wei Yang Cc: David Rientjes Cc: Thomas Gleixner Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Signed-off-by: Dan Williams --- arch/x86/mm/numa_e

[PATCH 0/2] x86/numa_emulation: Introduce uniform split capability

as described by the ACPI HMAT (see 5.2.27.5 Memory Side Cache Information Structure in ACPI 6.2a) See more details in patch2. --- Dan Williams (2): x86/numa_emulation: Fix emulated-to-physical node mapping x86/numa_emulation: Introduce uniform split capability Documentation/x86/x86_64/boot

[PATCH 2/2] x86/numa_emulation: Introduce uniform split capability

h...@zytor.com> Cc: Ingo Molnar <mi...@redhat.com> Cc: <x...@kernel.org> Signed-off-by: Dan Williams <dan.j.willi...@intel.com> --- Documentation/x86/x86_64/boot-options.txt |4 + arch/x86/mm/numa_emulation.c | 96 +++-- 2 files ch

[PATCH 2/2] x86/numa_emulation: Introduce uniform split capability

20 2: 10 10 10 20 20 20 3: 20 20 20 10 10 10 4: 20 20 20 10 10 10 5: 20 20 20 10 10 10 Cc: Wei Yang Cc: David Rientjes Cc: Thomas Gleixner Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Signed-off-by: Dan Williams --- Documentation/x86/x86_64/boot-o

[PATCH] uio, lib: Fix CONFIG_ARCH_HAS_UACCESS_MCSAFE compilation

Add a common Kconfig CONFIG_ARCH_HAS_UACCESS_MCSAFE that archs can optionally select, and fixup the declaration of _copy_to_iter_mcsafe(). Fixes: 8780356ef630 ("x86/asm/memcpy_mcsafe: Define copy_to_iter_mcsafe()") Signed-off-by: Dan Williams <dan.j.willi...@intel.com> --- Ingo, T

[PATCH] uio, lib: Fix CONFIG_ARCH_HAS_UACCESS_MCSAFE compilation

Add a common Kconfig CONFIG_ARCH_HAS_UACCESS_MCSAFE that archs can optionally select, and fixup the declaration of _copy_to_iter_mcsafe(). Fixes: 8780356ef630 ("x86/asm/memcpy_mcsafe: Define copy_to_iter_mcsafe()") Signed-off-by: Dan Williams --- Ingo, Thomas, fyi, here is a trivial c

[PATCH] x86/spectre_v1: Disable compiler optimizations over array_index_mask_nospec()

;pet...@infradead.org> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Ingo Molnar <mi...@kernel.org> Reported-by: Mark Rutland <mark.rutl...@arm.com> Signed-off-by: Dan Williams <dan.j.willi...@intel.com> --- arch/x86/include/asm/barrier.h |3 ++- 1 file changed,

[PATCH] x86/spectre_v1: Disable compiler optimizations over array_index_mask_nospec()

ove. Regardless, I worry this is fragile -- GCC *can* generate code as per the above, even if it's unlikely to. Cc: Fixes: babdde2698d4 ("x86: Implement array_index_mask_nospec") Cc: Thomas Gleixner Cc: Peter Zijlstra Cc: Linus Torvalds Cc: Ingo Molnar Reported-by: Mark Rutlan

Re: [PATCH 0/5] mm: rework hmm to use devm_memremap_pages

On Wed, May 23, 2018 at 5:10 PM, Jerome Glisse <jgli...@redhat.com> wrote: > On Mon, May 21, 2018 at 03:35:14PM -0700, Dan Williams wrote: >> Hi Andrew, please consider this series for 4.18. >> >> For maintainability, as ZONE_DEVICE continues to attract new users, >&g

Re: [PATCH 0/5] mm: rework hmm to use devm_memremap_pages

On Wed, May 23, 2018 at 5:10 PM, Jerome Glisse wrote: > On Mon, May 21, 2018 at 03:35:14PM -0700, Dan Williams wrote: >> Hi Andrew, please consider this series for 4.18. >> >> For maintainability, as ZONE_DEVICE continues to attract new users, >> it is useful to

Re: [PATCH v3 7/9] dax: report bytes remaining in dax_iomap_actor()

On Wed, May 23, 2018 at 9:47 AM, Ross Zwisler <ross.zwis...@linux.intel.com> wrote: > On Wed, May 23, 2018 at 09:39:04AM -0700, Dan Williams wrote: >> On Wed, May 23, 2018 at 9:34 AM, Ross Zwisler >> <ross.zwis...@linux.intel.com> wrote: >> > On Thu, May 03, 20

Re: [PATCH v3 7/9] dax: report bytes remaining in dax_iomap_actor()

On Wed, May 23, 2018 at 9:47 AM, Ross Zwisler wrote: > On Wed, May 23, 2018 at 09:39:04AM -0700, Dan Williams wrote: >> On Wed, May 23, 2018 at 9:34 AM, Ross Zwisler >> wrote: >> > On Thu, May 03, 2018 at 05:06:42PM -0700, Dan Williams wrote: >> >> In prepa

Re: [PATCH v3 7/9] dax: report bytes remaining in dax_iomap_actor()

On Wed, May 23, 2018 at 9:34 AM, Ross Zwisler <ross.zwis...@linux.intel.com> wrote: > On Thu, May 03, 2018 at 05:06:42PM -0700, Dan Williams wrote: >> In preparation for protecting the dax read(2) path from media errors >> with copy_to_iter_mcsafe() (via dax_cop

Re: [PATCH v3 7/9] dax: report bytes remaining in dax_iomap_actor()

On Wed, May 23, 2018 at 9:34 AM, Ross Zwisler wrote: > On Thu, May 03, 2018 at 05:06:42PM -0700, Dan Williams wrote: >> In preparation for protecting the dax read(2) path from media errors >> with copy_to_iter_mcsafe() (via dax_copy_to_iter()), convert the >> implementatio

Re: [PATCH] kernel: sys: fix potential Spectre v1

On Wed, May 23, 2018 at 8:07 AM, Mark Rutland wrote: > On Wed, May 23, 2018 at 11:08:40AM +0200, Peter Zijlstra wrote: >> >> Sorry for being late to the party.. > > Likewise! > >> On Wed, May 23, 2018 at 12:03:57AM -0500, Gustavo A. R. Silva wrote: >> > +#define

Re: [PATCH] kernel: sys: fix potential Spectre v1

On Wed, May 23, 2018 at 8:07 AM, Mark Rutland wrote: > On Wed, May 23, 2018 at 11:08:40AM +0200, Peter Zijlstra wrote: >> >> Sorry for being late to the party.. > > Likewise! > >> On Wed, May 23, 2018 at 12:03:57AM -0500, Gustavo A. R. Silva wrote: >> > +#define validate_index_nospec(index, size)

Re: [PATCH v2 3/7] mm, devm_memremap_pages: Fix shutdown handling

On Wed, May 23, 2018 at 8:47 AM, Logan Gunthorpe <log...@deltatee.com> wrote: > > > On 22/05/18 11:10 PM, Dan Williams wrote: >> diff --git a/include/linux/memremap.h b/include/linux/memremap.h >> index 7b4899c06f49..b5e894133cf6 100644 >> --- a/include/linux/

Re: [PATCH v2 3/7] mm, devm_memremap_pages: Fix shutdown handling

On Wed, May 23, 2018 at 8:47 AM, Logan Gunthorpe wrote: > > > On 22/05/18 11:10 PM, Dan Williams wrote: >> diff --git a/include/linux/memremap.h b/include/linux/memremap.h >> index 7b4899c06f49..b5e894133cf6 100644 >> --- a/include/linux/memremap.h >> +++ b/incl

Re: [PATCH] kernel: sys: fix potential Spectre v1

On Wed, May 23, 2018 at 2:08 AM, Peter Zijlstra wrote: > > Sorry for being late to the party.. > > On Wed, May 23, 2018 at 12:03:57AM -0500, Gustavo A. R. Silva wrote: > >> +#define validate_index_nospec(index, size)\ >> +({

Re: [PATCH] kernel: sys: fix potential Spectre v1

On Wed, May 23, 2018 at 2:08 AM, Peter Zijlstra wrote: > > Sorry for being late to the party.. > > On Wed, May 23, 2018 at 12:03:57AM -0500, Gustavo A. R. Silva wrote: > >> +#define validate_index_nospec(index, size)\ >> +({

[PATCH v2 4/7] mm, devm_memremap_pages: Add MEMORY_DEVICE_PRIVATE support

@deltatee.com> Signed-off-by: Dan Williams <dan.j.willi...@intel.com> --- kernel/memremap.c | 38 -- 1 file changed, 32 insertions(+), 6 deletions(-) diff --git a/kernel/memremap.c b/kernel/memremap.c index dfec0801f652..89eed25e2a80 100644 --

[PATCH v2 4/7] mm, devm_memremap_pages: Add MEMORY_DEVICE_PRIVATE support

In preparation for consolidating all ZONE_DEVICE enabling via devm_memremap_pages(), teach it how to handle the constraints of MEMORY_DEVICE_PRIVATE ranges. Cc: Christoph Hellwig Cc: "Jérôme Glisse" Reported-by: Logan Gunthorpe Signed-off-by: Dan Williams --- kernel/memrema

[PATCH v2 6/7] mm, hmm: Replace hmm_devmem_pages_create() with devm_memremap_pages()

Christoph Hellwig <h...@lst.de> Cc: "Jérôme Glisse" <jgli...@redhat.com> Cc: Logan Gunthorpe <log...@deltatee.com> Signed-off-by: Dan Williams <dan.j.willi...@intel.com> --- mm/hmm.c | 198 -- 1 file chan

[PATCH v2 6/7] mm, hmm: Replace hmm_devmem_pages_create() with devm_memremap_pages()

Christoph Hellwig Cc: "Jérôme Glisse" Cc: Logan Gunthorpe Signed-off-by: Dan Williams --- mm/hmm.c | 198 -- 1 file changed, 26 insertions(+), 172 deletions(-) diff --git a/mm/hmm.c b/mm/hmm.c index d081857f29b5..5723331f6

[PATCH v2 5/7] mm, hmm: Use devm semantics for hmm_devmem_{add, remove}

<h...@lst.de> Cc: "Jérôme Glisse" <jgli...@redhat.com> Cc: Logan Gunthorpe <log...@deltatee.com> Signed-off-by: Dan Williams <dan.j.willi...@intel.com> --- Documentation/vm/hmm.txt |1 include/linux/hmm.h |4

[PATCH v2 2/7] mm, devm_memremap_pages: Kill mapping "System RAM" support

error. Cc: Christoph Hellwig <h...@lst.de> Cc: "Jérôme Glisse" <jgli...@redhat.com> Cc: Logan Gunthorpe <log...@deltatee.com> Signed-off-by: Dan Williams <dan.j.willi...@intel.com> --- kernel/memremap.c |9 +++-- 1 file changed, 3 insertions(+), 6 deletions(

[PATCH v2 1/7] mm, devm_memremap_pages: Mark devm_memremap_pages() EXPORT_SYMBOL_GPL

structure reference counting relative to get_user_pages() and get_user_pages_fast(). It was an oversight that this was not marked EXPORT_SYMBOL_GPL from the outset. Cc: Michal Hocko <mho...@suse.com> Cc: "Jérôme Glisse" <jgli...@redhat.com> Reviewed-by: Christoph Hellwig <h...@l

[PATCH v2 7/7] mm, hmm: Mark hmm_devmem_{add, add_resource} EXPORT_SYMBOL_GPL

that these symbols were not marked EXPORT_SYMBOL_GPL from the outset due to how they originally copied (and now reuse) devm_memremap_pages(). Cc: "Jérôme Glisse" <jgli...@redhat.com> Cc: Logan Gunthorpe <log...@deltatee.com> Reviewed-by: Christoph Hellwig <h...@lst.de> Signed-off-b

[PATCH v2 3/7] mm, devm_memremap_pages: Fix shutdown handling

remap_pages interface...") Cc: Christoph Hellwig <h...@lst.de> Cc: "Jérôme Glisse" <jgli...@redhat.com> Reported-by: Logan Gunthorpe <log...@deltatee.com> Signed-off-by: Dan Williams <dan.j.willi...@intel.com> --- drivers/dax/pmem.c| 10 ++

[PATCH v2 1/7] mm, devm_memremap_pages: Mark devm_memremap_pages() EXPORT_SYMBOL_GPL

structure reference counting relative to get_user_pages() and get_user_pages_fast(). It was an oversight that this was not marked EXPORT_SYMBOL_GPL from the outset. Cc: Michal Hocko Cc: "Jérôme Glisse" Reviewed-by: Christoph Hellwig Signed-off-by: Dan Williams --- kernel/memremap.c |

[PATCH v2 7/7] mm, hmm: Mark hmm_devmem_{add, add_resource} EXPORT_SYMBOL_GPL

that these symbols were not marked EXPORT_SYMBOL_GPL from the outset due to how they originally copied (and now reuse) devm_memremap_pages(). Cc: "Jérôme Glisse" Cc: Logan Gunthorpe Reviewed-by: Christoph Hellwig Signed-off-by: Dan Williams --- mm/hmm.c |4 ++-- 1 file changed, 2 insert

[PATCH v2 3/7] mm, devm_memremap_pages: Fix shutdown handling

") Cc: Christoph Hellwig Cc: "Jérôme Glisse" Reported-by: Logan Gunthorpe Signed-off-by: Dan Williams --- drivers/dax/pmem.c| 10 ++ drivers/nvdimm/pmem.c | 18 -- include/linux/memremap.h |7 +-

[PATCH v2 5/7] mm, hmm: Use devm semantics for hmm_devmem_{add, remove}

Cc: "Jérôme Glisse" Cc: Logan Gunthorpe Signed-off-by: Dan Williams --- Documentation/vm/hmm.txt |1 include/linux/hmm.h |4 - mm/hmm.c | 127 +- 3 files changed, 25 insertions(+), 107 deletions(-)

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