On Fri, 2019-06-21 at 23:50 +0900, Masami Hiramatsu wrote:
> On Tue, 18 Jun 2019 20:17:06 +0530
> "Naveen N. Rao" wrote:
trivia:
> > diff --git a/arch/powerpc/kernel/kprobes-ftrace.c
> > b/arch/powerpc/kernel/kprobes-ftrace.c
[]
> > @@ -57,6 +82,11 @@ NOKPROBE_SYMBOL(kprobe_ftrace_handler);
>
Christoph Hellwig's on June 21, 2019 6:15 pm:
> On Thu, Jun 20, 2019 at 10:21:46AM -0700, Linus Torvalds wrote:
>> Hmm. Honestly, I've never seen anything like that in any kernel profiles.
>>
>> Compared to the problems I _do_ see (which is usually the obvious
>> cache misses, and locking), it
On Fri, 21 Jun 2019 20:24:59 +0200 David Hildenbrand wrote:
> @Qian Cai, unfortunately I can't reproduce.
>
> If you get the chance, it would be great if you could retry with
>
> diff --git a/drivers/base/memory.c b/drivers/base/memory.c
> index 972c5336bebf..742f99ddd148 100644
> ---
Mahesh J Salgaonkar's on June 21, 2019 9:47 pm:
> On 2019-06-21 06:27:15 Fri, Santosh Sivaraj wrote:
>> From: Reza Arbab
>>
>> Testing my memcpy_mcsafe() work in progress with an injected UE, I get
>> an error like this immediately after the function returns:
>>
>> BUG: Unable to handle kernel
The early machine check runs in real mode, so locking is unnecessary.
Worse, the windup does not restore AMR, so this can result in a false
KUAP fault after a recoverable machine check hits inside a user copy
operation.
Fix this similarly to HMI by just avoiding the kuap lock in the
early machine
_memory_block_hinted()"
> > 5cfcd52288b6 Revert "drivers-base-memoryc-get-rid-of-
> > find_memory_block_hinted-
> > v3"
> >
> > [4.582081][T1] ACPI FADT declares the system doesn't support PCIe
> > ASPM,
> > so disable it
> &g
ry_hotplug: move and simplify
>>>> walk_memory_blocks()"
>>>> 59a9f3eec5d1 Revert "drivers/base/memory.c: Get rid of
>>>> find_memory_block_hinted()"
>>>> 5cfcd52288b6 Revert "drivers-base-memoryc-get-rid-of-
>>>> find_memory_blo
ot;drivers/base/memory.c: Get rid of
> > > find_memory_block_hinted()"
> > > 5cfcd52288b6 Revert "drivers-base-memoryc-get-rid-of-
> > > find_memory_block_hinted-
> > > v3"
> > >
> > > [4.582081][T1] ACPI FADT declares
_block_hinted-
>> v3"
>>
>> [4.582081][T1] ACPI FADT declares the system doesn't support PCIe
>> ASPM,
>> so disable it
>> [4.590405][T1] ACPI: bus type PCI registered
>> [4.592908][T1] PCI: MMCONFIG for domain [bus 00-ff]
memoryc-get-rid-of-find_memory_block_hinted-
> v3"
>
> [4.582081][T1] ACPI FADT declares the system doesn't support PCIe
> ASPM,
> so disable it
> [4.590405][T1] ACPI: bus type PCI registered
> [4.592908][T1] PCI: MMCONFIG for domain [bus 00-ff] at
On Fri, Jun 21, 2019 at 09:35:11AM -0600, Khalid Aziz wrote:
> On 6/21/19 7:39 AM, Jason Gunthorpe wrote:
> > On Tue, Jun 11, 2019 at 04:40:47PM +0200, Christoph Hellwig wrote:
> >> This will allow sparc64 to override its ADI tags for
> >> get_user_pages and get_user_pages_fast.
> >>
> >>
On 6/21/19 7:39 AM, Jason Gunthorpe wrote:
> On Tue, Jun 11, 2019 at 04:40:47PM +0200, Christoph Hellwig wrote:
>> This will allow sparc64 to override its ADI tags for
>> get_user_pages and get_user_pages_fast.
>>
>> Signed-off-by: Christoph Hellwig
>> mm/gup.c | 4 ++--
>> 1 file changed, 2
On 20.06.19 20:31, David Hildenbrand wrote:
> Let's move walk_memory_blocks() to the place where memory block logic
> resides and simplify it. While at it, add a type for the callback function.
>
> Cc: Greg Kroah-Hartman
> Cc: "Rafael J. Wysocki"
> Cc: David Hildenbrand
> Cc: Andrew Morton
>
memoryc-get-rid-of-find_memory_block_hinted-
> v3"
>
> [4.582081][T1] ACPI FADT declares the system doesn't support PCIe
> ASPM,
> so disable it
> [4.590405][T1] ACPI: bus type PCI registered
> [4.592908][T1] PCI: MMCONFIG for domain [bus 00-ff] at
ff] at [mem
0x8000-0x8fff] (base 0x8000)
[4.601860][T1] PCI: MMCONFIG at [mem 0x8000-0x8fff] reserved in
E820
[4.601860][T1] PCI: Using configuration type 1 for base access
[ 28.661336][ C16] watchdog: BUG: soft lockup - CPU#16 stuck for 22s!
[swapper/0:1]
[ 28.67135
On Tue, 18 Jun 2019 20:17:06 +0530
"Naveen N. Rao" wrote:
> With KPROBES_ON_FTRACE, kprobe is allowed to be inserted on instructions
> that branch to _mcount (referred to as ftrace location). With
> -mprofile-kernel, we now include the preceding 'mflr r0' as being part
> of the ftrace location.
On Tue, Jun 11, 2019 at 04:40:46PM +0200, Christoph Hellwig wrote:
> Hi Linus and maintainers,
>
> below is a series to switch mips, sh and sparc64 to use the generic
> GUP code so that we only have one codebase to touch for further
> improvements to this code. I don't have hardware for any of
On Tue, 18 Jun 2019 20:17:05 +0530
"Naveen N. Rao" wrote:
> Ftrace location could include more than a single instruction in case of
> some architectures (powerpc64, for now). In this case, kprobe is
> permitted on any of those instructions, and uses ftrace infrastructure
> for functioning.
>
>
On Tue, Jun 11, 2019 at 04:40:57PM +0200, Christoph Hellwig wrote:
> @@ -2168,7 +2221,7 @@ static void gup_pgd_range(unsigned long addr, unsigned
> long end,
> */
> static bool gup_fast_permitted(unsigned long start, unsigned long end)
> {
> - return true;
> + return
On Tue, Jun 11, 2019 at 04:40:56PM +0200, Christoph Hellwig wrote:
> We only support the generic GUP now, so rename the config option to
> be more clear, and always use the mm/Kconfig definition of the
> symbol and select it from the arch Kconfigs.
Looks OK to me
Reviewed-by: Jason Gunthorpe
On Tue, Jun 11, 2019 at 04:40:50PM +0200, Christoph Hellwig wrote:
> diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
> index 4ccb465ef3f2..7d27194e3b45 100644
> +++ b/arch/mips/include/asm/pgtable.h
> @@ -20,6 +20,7 @@
> #include
> #include
> #include
>
On Tue, Jun 11, 2019 at 04:40:49PM +0200, Christoph Hellwig wrote:
> The split low/high access is the only non-READ_ONCE version of
> gup_get_pte that did show up in the various arch implemenations.
> Lift it to common code and drop the ifdef based arch override.
>
> Signed-off-by: Christoph
On Tue, Jun 11, 2019 at 04:40:48PM +0200, Christoph Hellwig wrote:
> Pass in the already calculated end value instead of recomputing it, and
> leave the end > start check in the callers instead of duplicating them
> in the arch code.
>
> Signed-off-by: Christoph Hellwig
> ---
>
On Tue, Jun 11, 2019 at 04:40:47PM +0200, Christoph Hellwig wrote:
> This will allow sparc64 to override its ADI tags for
> get_user_pages and get_user_pages_fast.
>
> Signed-off-by: Christoph Hellwig
> mm/gup.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git
On Tue, Jun 11, 2019 at 04:40:47PM +0200, Christoph Hellwig wrote:
> This will allow sparc64 to override its ADI tags for
> get_user_pages and get_user_pages_fast.
>
> Signed-off-by: Christoph Hellwig
> ---
> mm/gup.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
Reviewed-by:
On 2019-06-21 06:27:15 Fri, Santosh Sivaraj wrote:
> From: Reza Arbab
>
> Testing my memcpy_mcsafe() work in progress with an injected UE, I get
> an error like this immediately after the function returns:
>
> BUG: Unable to handle kernel data access at 0x7fff84dec8f8
> Faulting instruction
On Fri, Jun 21, 2019 at 11:21:38AM +0200, Frederic Barrat wrote:
> The as-notify can be used in both CAPI mode and PCI mode. In capi mode,
> it's integrated in the capi protocol, so the cxl driver doesn't need to do
> extra setup, compared to what's already done to activate capi.
> As mentioned
Le 21/06/2019 à 03:47, Oliver O'Halloran a écrit :
On Thu, May 23, 2019 at 5:51 PM Christoph Hellwig wrote:
These have been unused ever since they've been added to the kernel.
Signed-off-by: Christoph Hellwig
---
arch/powerpc/include/asm/pnv-pci.h| 4 --
When building with clang-8 the frame size limit is hit:
../arch/powerpc/lib/xor_vmx.c:119:6: error: stack frame size of 1200 bytes in
function '__xor_altivec_5' [-Werror,-Wframe-larger-than=]
Follow the same approach as commit 9c87156cce5a ("powerpc/xmon: Relax
frame size for clang") until a
Linus Torvalds's on June 21, 2019 3:21 am:
> On Thu, Jun 20, 2019 at 5:19 AM Nicholas Piggin wrote:
>>
>> The processor aliasing problem happens because the struct will
>> be initialised with stores using one base register (e.g., stack
>> register), and then same memory is loaded using a
On Thu, Jun 20, 2019 at 10:21:46AM -0700, Linus Torvalds wrote:
> Hmm. Honestly, I've never seen anything like that in any kernel profiles.
>
> Compared to the problems I _do_ see (which is usually the obvious
> cache misses, and locking), it must either be in the noise or it's
> some problem
On 6/21/19 6:27 AM, Santosh Sivaraj wrote:
> From: Reza Arbab
>
> If a notifier returns NOTIFY_STOP, consider the MCE handled, just as we
> do when machine_check_early() returns 1.
>
> Signed-off-by: Reza Arbab
> ---
> arch/powerpc/include/asm/asm-prototypes.h | 2 +-
>
The protocol for suspending or migrating an LPAR requires all present
processor threads to enter H_JOIN. So if we have threads offline, we
have to temporarily bring them up. This can race with administrator
actions such as SMT state changes. As of dfd718a2ed1f ("powerpc/rtas:
Fix a potential race
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