On Wed, Jan 25, 2023, at 20:07, Mike Rapoport wrote:
> From: "Mike Rapoport (IBM)"
>
> Every architecture that supports FLATMEM memory model defines its own
> version of pfn_valid() that essentially compares a pfn to max_mapnr.
>
> Use mips/powerpc version implemented as static inline as a generic
Le 11/10/2022 à 12:25, Christophe Leroy a écrit :
Le 11/10/2022 à 12:00, Michael Ellerman a écrit :
Nathan Lynch writes:
Michael Ellerman writes:
Christophe Leroy writes:
+ KASAN list
Le 06/10/2022 à 06:10, Michael Ellerman a écrit :
Nathan Lynch writes:
kasan is known to crash at
On powerpc64, you can build a kernel with KASAN as soon as you build it
with RADIX MMU support. However if the CPU doesn't have RADIX MMU,
KASAN isn't enabled at init and the following Oops is encountered.
[0.00][T0] KASAN not enabled as it requires radix!
[4.484295][ T26] B
On Wed, Jan 25, 2023 at 1:20 AM Nathan Chancellor wrote:
>
> After commit 7bbf02b875b5 ("kbuild: Stop using '-Qunused-arguments' with
> clang"), the PowerPC vDSO shows the following error with clang-13 and
> older when CONFIG_INIT_STACK_ALL_ZERO is enabled:
>
> clang: error: argument unused duri
On Thu, Jan 26, 2023 at 11:07 AM Nathan Chancellor wrote:
>
> On Thu, Jan 26, 2023 at 10:29:54AM +0900, Masahiro Yamada wrote:
> > On Wed, Jan 25, 2023 at 1:11 PM Michael Ellerman
> > wrote:
> > >
> > > Nathan Chancellor writes:
> > > > When clang's -Qunused-arguments is dropped from KBUILD_CPP
On Thu, Jan 26, 2023 at 10:29:54AM +0900, Masahiro Yamada wrote:
> On Wed, Jan 25, 2023 at 1:11 PM Michael Ellerman wrote:
> >
> > Nathan Chancellor writes:
> > > When clang's -Qunused-arguments is dropped from KBUILD_CPPFLAGS, it
> > > points out that KBUILD_AFLAGS contains a linker flag, which
On Wed, 25 Jan 2023 21:07:57 +0200 Mike Rapoport wrote:
> Every architecture that supports FLATMEM memory model defines its own
> version of pfn_valid() that essentially compares a pfn to max_mapnr.
>
> Use mips/powerpc version implemented as static inline as a generic
> implementation of pfn_va
On Wed, 25 Jan 2023 16:50:01 -0800 Suren Baghdasaryan wrote:
> On Wed, Jan 25, 2023 at 4:22 PM Andrew Morton
> wrote:
> >
> > On Wed, 25 Jan 2023 15:35:48 -0800 Suren Baghdasaryan
> > wrote:
> >
> > > Convert vma assignment in vm_area_dup() to a memcpy() to prevent compiler
> > > errors when
On Wed, Jan 25, 2023 at 1:11 PM Michael Ellerman wrote:
>
> Nathan Chancellor writes:
> > When clang's -Qunused-arguments is dropped from KBUILD_CPPFLAGS, it
> > points out that KBUILD_AFLAGS contains a linker flag, which will be
> > used:
>
> Should that say "unused" ?
Nathan, shall I fix it
The #slots literal will return NAN when not on ARM64 which causes a
perf test failure when not on an ARM64 for a JEVENTS_ARCH=all build:
..
10.4: Parsing of PMU event table metrics with fake PMUs : FAILED!
..
Add an is_test boolean so that the failure can be avoided when running
as a t
This allows the set of generated jevents events and metrics be limited
to a subset of the model names. Appropriate if trying to minimize the
binary size where only a set of models are possible.
Signed-off-by: Ian Rogers
---
tools/perf/pmu-events/Build | 3 ++-
tools/perf/pmu-events/jevents
Turn a perf json event into an event, metric or both. This reduces the
number of events needed to scan to find an event or metric. As events
no longer need the relatively seldom used metric fields, 4 bytes is
saved per event. This reduces the big C string's size by 335kb (14.8%)
on x86.
Note, for
Add a metrics table that is just a cast from pmu_events_table. This
changes the APIs so that event and metric usage of the underlying
table is different. For the no jevents case the tables are already
separate, later changes will separate the tables for the jevents case.
Signed-off-by: Ian Rogers
Combine into a single function to simplify, in a later change, writing
metrics separately.
Signed-off-by: Ian Rogers
---
tools/perf/pmu-events/jevents.py | 36 +---
1 file changed, 14 insertions(+), 22 deletions(-)
diff --git a/tools/perf/pmu-events/jevents.py b/tool
Metrics are their own unit and these variables held broken metrics
previously and now just hold the value NULL. Remove code that used
these variables.
Reviewed-by: John Garry
Signed-off-by: Ian Rogers
---
tools/perf/builtin-stat.c | 1 -
tools/perf/util/cgroup.c | 1 -
tools/perf/u
Previous changes separated the uses of pmu_event and pmu_metric,
however, both structures contained all the variables of event and
metric. This change removes the event variables from metric and the
metric variables from event.
Note, this change removes the setting of evsel's metric_name/expr as
t
Separate the event and metric table when building without jevents. Add
find_core_metrics_table and perf_pmu__find_metrics_table while
renaming existing utilities to be event specific, so that users can
find the right table for their need.
Reviewed-by: John Garry
Signed-off-by: Ian Rogers
---
to
Create a new pmu_metric for the metric related variables from
pmu_event but that is initially just a clone of pmu_event. Add
iterators for pmu_metric and use in places that metrics are desired
rather than events. Make the event iterator skip metric only events,
and the metric iterator skip event on
Rewrite metrics within the same file in terms of each other. For example, on
Power8
other_stall_cpi is rewritten from:
"PM_CMPLU_STALL / PM_RUN_INST_CMPL - PM_CMPLU_STALL_BRU_CRU / PM_RUN_INST_CMPL
- PM_CMPLU_STALL_FXU / PM_RUN_INST_CMPL - PM_CMPLU_STALL_VSU / PM_RUN_INST_CMPL
- PM_CMPLU_STALL_L
Add RewriteMetricsInTermsOfOthers that iterates over pairs of names
and expressions trying to replace an expression, within the current
expression, with its name.
Signed-off-by: Ian Rogers
---
tools/perf/pmu-events/metric.py | 73 +++-
tools/perf/pmu-events/metric_te
rhs may not be defined, say for source_count, so add a guard.
Reviewed-by: Kajol Jain
Signed-off-by: Ian Rogers
---
tools/perf/pmu-events/metric.py | 6 --
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/tools/perf/pmu-events/metric.py b/tools/perf/pmu-events/metric.py
index 47
Add an optimization to jevents using the metric code, rewrite metrics
in terms of each other in order to minimize size and improve
readability. For example, on Power8
other_stall_cpi is rewritten from:
"PM_CMPLU_STALL / PM_RUN_INST_CMPL - PM_CMPLU_STALL_BRU_CRU / PM_RUN_INST_CMPL
- PM_CMPLU_STALL_
On Wed, Jan 25, 2023 at 4:28 PM Andrew Morton wrote:
>
> On Wed, 25 Jan 2023 15:35:49 -0800 Suren Baghdasaryan
> wrote:
>
> > --- a/include/linux/mm_types.h
> > +++ b/include/linux/mm_types.h
> > @@ -491,7 +491,15 @@ struct vm_area_struct {
> >* See vmf_insert_mixed_prot() for discussion
On Wed, Jan 25, 2023 at 4:24 PM Andrew Morton wrote:
>
> On Wed, 25 Jan 2023 15:35:49 -0800 Suren Baghdasaryan
> wrote:
>
> > vm_flags are among VMA attributes which affect decisions like VMA merging
> > and splitting. Therefore all vm_flags modifications are performed after
> > taking exclusive
On Wed, Jan 25, 2023 at 4:22 PM Andrew Morton wrote:
>
> On Wed, 25 Jan 2023 15:35:48 -0800 Suren Baghdasaryan
> wrote:
>
> > Convert vma assignment in vm_area_dup() to a memcpy() to prevent compiler
> > errors when we add a const modifier to vma->vm_flags.
> >
> > ...
> >
> > --- a/kernel/fork.
On Wed, 25 Jan 2023 15:35:49 -0800 Suren Baghdasaryan wrote:
> --- a/include/linux/mm_types.h
> +++ b/include/linux/mm_types.h
> @@ -491,7 +491,15 @@ struct vm_area_struct {
>* See vmf_insert_mixed_prot() for discussion.
>*/
> pgprot_t vm_page_prot;
> - unsigned long vm_
On Wed, 25 Jan 2023 15:35:49 -0800 Suren Baghdasaryan wrote:
> vm_flags are among VMA attributes which affect decisions like VMA merging
> and splitting. Therefore all vm_flags modifications are performed after
> taking exclusive mmap_lock to prevent vm_flags updates racing with such
> operations
On Wed, 25 Jan 2023 15:35:48 -0800 Suren Baghdasaryan wrote:
> Convert vma assignment in vm_area_dup() to a memcpy() to prevent compiler
> errors when we add a const modifier to vma->vm_flags.
>
> ...
>
> --- a/kernel/fork.c
> +++ b/kernel/fork.c
> @@ -482,7 +482,7 @@ struct vm_area_struct *vm_a
On Thu, Dec 29, 2022 at 07:01:37PM -0500, Sean Anderson wrote:
> This adds bindings for the SerDes devices. They are disabled by default
> to prevent any breakage on existing boards.
>
> Signed-off-by: Sean Anderson
> ---
>
> (no changes since v4)
>
> Changes in v4:
> - Convert to new bindings
On Thu, Dec 29, 2022 at 07:01:35PM -0500, Sean Anderson wrote:
> This adds bindings for the SerDes devices. They are disabled by default
s/bindings/descriptions?
The term "bindings" generally means the schema/doc in
Documentation/devicetree/bindings/.
Shawn
> to prevent any breakage on existing
On Thu, Dec 29, 2022 at 07:01:36PM -0500, Sean Anderson wrote:
> This adds appropriate bindings for the macs which use the SerDes. The
> 156.25MHz fixed clock is a crystal. The 100MHz clocks (there are
> actually 3) come from a Renesas 6V49205B at address 69 on i2c0. There is
> no driver for this d
mmap_assert_write_locked() is used in vm_flags modifiers. Because
mmap_assert_write_locked() uses dump_mm() and vm_flags are sometimes
modified from inside a module, it's necessary to export dump_mm()
function.
Signed-off-by: Suren Baghdasaryan
Acked-by: Michal Hocko
---
mm/debug.c | 1 +
1 fil
In cases when VMA flags are modified after VMA was isolated and mmap_lock
was downgraded, flags modifications would result in an assertion because
mmap write lock is not held.
Introduce mod_vm_flags_nolock to be used in such situation, when VMA is
not part of VMA tree and locking it is not required
Replace indirect modifications to vma->vm_flags with calls to modifier
functions to be able to track flag changes and to keep vma locking
correctness.
Signed-off-by: Suren Baghdasaryan
Acked-by: Michal Hocko
---
arch/powerpc/kvm/book3s_hv_uvmem.c | 5 -
arch/s390/mm/gmap.c|
Replace direct modifications to vma->vm_flags with calls to modifier
functions to be able to track flag changes and to keep vma locking
correctness.
Signed-off-by: Suren Baghdasaryan
Acked-by: Michal Hocko
---
arch/arm/kernel/process.c | 2 +-
arch/ia64/mm/init.c
To simplify the usage of VM_LOCKED_CLEAR_MASK in clear_vm_flags(),
replace it with VM_LOCKED_MASK bitmask and convert all users.
Signed-off-by: Suren Baghdasaryan
Acked-by: Michal Hocko
---
include/linux/mm.h | 4 ++--
kernel/fork.c | 2 +-
mm/hugetlb.c | 4 ++--
mm/mlock.c |
vm_flags are among VMA attributes which affect decisions like VMA merging
and splitting. Therefore all vm_flags modifications are performed after
taking exclusive mmap_lock to prevent vm_flags updates racing with such
operations. Introduce modifier functions for vm_flags to be used whenever
flags a
Convert vma assignment in vm_area_dup() to a memcpy() to prevent compiler
errors when we add a const modifier to vma->vm_flags.
Signed-off-by: Suren Baghdasaryan
---
kernel/fork.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/fork.c b/kernel/fork.c
index 6683c1b0f460
This patchset was originally published as a part of per-VMA locking [1] and
was split after suggestion that it's viable on its own and to facilitate
the review process. It is now a preprequisite for the next version of per-VMA
lock patchset, which reuses vm_flags modifier functions to lock the VMA
On Wed, Jan 25, 2023 at 10:33 AM Matthew Wilcox wrote:
>
> On Wed, Jan 25, 2023 at 12:38:46AM -0800, Suren Baghdasaryan wrote:
> > +/* Use when VMA is not part of the VMA tree and needs no locking */
> > +static inline void init_vm_flags(struct vm_area_struct *vma,
> > +
On Wed, Jan 25, 2023 at 10:37 AM Matthew Wilcox wrote:
>
> On Wed, Jan 25, 2023 at 08:49:50AM -0800, Suren Baghdasaryan wrote:
> > On Wed, Jan 25, 2023 at 1:10 AM Peter Zijlstra wrote:
> > > > + /*
> > > > + * Flags, see mm.h.
> > > > + * WARNING! Do not modify directly.
> > > > +
On Wed, Jan 25, 2023 at 08:49:50AM -0800, Suren Baghdasaryan wrote:
> On Wed, Jan 25, 2023 at 1:10 AM Peter Zijlstra wrote:
> > > + /*
> > > + * Flags, see mm.h.
> > > + * WARNING! Do not modify directly.
> > > + * Use {init|reset|set|clear|mod}_vm_flags() functions instead.
> >
On Wed, Jan 25, 2023 at 12:38:46AM -0800, Suren Baghdasaryan wrote:
> +/* Use when VMA is not part of the VMA tree and needs no locking */
> +static inline void init_vm_flags(struct vm_area_struct *vma,
> + unsigned long flags)
> +{
> + vma->vm_flags = flags;
vm_fl
On Wed, Jan 25, 2023 at 9:08 AM Michal Hocko wrote:
>
> On Wed 25-01-23 08:57:48, Suren Baghdasaryan wrote:
> > On Wed, Jan 25, 2023 at 1:38 AM 'Michal Hocko' via kernel-team
> > wrote:
> > >
> > > On Wed 25-01-23 00:38:49, Suren Baghdasaryan wrote:
> > > > Replace indirect modifications to vma->
On Wed 25-01-23 08:57:48, Suren Baghdasaryan wrote:
> On Wed, Jan 25, 2023 at 1:38 AM 'Michal Hocko' via kernel-team
> wrote:
> >
> > On Wed 25-01-23 00:38:49, Suren Baghdasaryan wrote:
> > > Replace indirect modifications to vma->vm_flags with calls to modifier
> > > functions to be able to track
On Wed, Jan 25, 2023 at 1:42 AM Michal Hocko wrote:
>
> On Wed 25-01-23 00:38:50, Suren Baghdasaryan wrote:
> > In cases when VMA flags are modified after VMA was isolated and mmap_lock
> > was downgraded, flags modifications would result in an assertion because
> > mmap write lock is not held.
>
On Wed, Jan 25, 2023 at 1:38 AM 'Michal Hocko' via kernel-team
wrote:
>
> On Wed 25-01-23 00:38:49, Suren Baghdasaryan wrote:
> > Replace indirect modifications to vma->vm_flags with calls to modifier
> > functions to be able to track flag changes and to keep vma locking
> > correctness. Add a BUG
On Wed, Jan 25, 2023 at 1:30 AM 'Michal Hocko' via kernel-team
wrote:
>
> On Wed 25-01-23 00:38:48, Suren Baghdasaryan wrote:
> > Replace direct modifications to vma->vm_flags with calls to modifier
> > functions to be able to track flag changes and to keep vma locking
> > correctness.
>
> Is this
On Wed, Jan 25, 2023 at 1:10 AM Peter Zijlstra wrote:
>
> On Wed, Jan 25, 2023 at 12:38:46AM -0800, Suren Baghdasaryan wrote:
>
> > diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
> > index 2d6d790d9bed..6c7c70bf50dd 100644
> > --- a/include/linux/mm_types.h
> > +++ b/include/linu
From: "Mike Rapoport (IBM)"
Every architecture that supports FLATMEM memory model defines its own
version of pfn_valid() that essentially compares a pfn to max_mapnr.
Use mips/powerpc version implemented as static inline as a generic
implementation of pfn_valid() and drop its per-architecture de
From: "Mike Rapoport (IBM)"
There is stale definition of pfn_valid() for DISCONTINGMEM memory model
guarded !FLATMEM && !SPARSEMEM && NUMA ifdefery.
Remove everything but definition of pfn_valid() for FLATMEM.
Signed-off-by: Mike Rapoport (IBM)
---
arch/mips/include/asm/page.h | 15 --
From: "Mike Rapoport (IBM)"
The MMU variant uses generic definitions of page_to_pfn() and
pfn_to_page(), but !MMU defines them in include/asm/page_no.h for no
good reason.
Include asm-generic/memory_model.h in the common include/asm/page.h and
drop redundant definitions.
Signed-off-by: Mike Rap
From: "Mike Rapoport (IBM)"
Hi,
Every architecture that supports FLATMEM memory model defines its own
version of pfn_valid() that essentially compares a pfn to max_mapnr.
Use mips/powerpc version implemented as static inline as a generic
implementation of pfn_valid() and drop its per-architectu
On Wed, Jan 25, 2023 at 10:53 AM Josh Poimboeuf wrote:
>
> On Wed, Jan 25, 2023 at 09:36:02AM -0800, Song Liu wrote:
> > On Wed, Jan 25, 2023 at 8:46 AM Josh Poimboeuf wrote:
> > >
> > > On Tue, Jan 24, 2023 at 10:09:56PM -0800, Song Liu wrote:
> > > > > @@ -514,9 +515,18 @@ static int restore_r2
On Wed, Jan 25, 2023 at 09:36:02AM -0800, Song Liu wrote:
> On Wed, Jan 25, 2023 at 8:46 AM Josh Poimboeuf wrote:
> >
> > On Tue, Jan 24, 2023 at 10:09:56PM -0800, Song Liu wrote:
> > > > @@ -514,9 +515,18 @@ static int restore_r2(const char *name, u32
> > > > *instruction, struct module *me)
> >
On Wed, Jan 25, 2023 at 8:46 AM Josh Poimboeuf wrote:
>
> On Tue, Jan 24, 2023 at 10:09:56PM -0800, Song Liu wrote:
> > > @@ -514,9 +515,18 @@ static int restore_r2(const char *name, u32
> > > *instruction, struct module *me)
> > > if (!instr_is_relative_link_branch(ppc_inst(*prev_insn)))
On 24/01/2023 06:33, Ian Rogers wrote:
This allows the set of generated jevents events and metrics be limited
to a subset of the model names. Appropriate if trying to minimize the
binary size where only a set of models are possible. On ARM64 the
--model selects the implementor rather than model.
On 24/01/2023 06:33, Ian Rogers wrote:
Previous changes separated the uses of pmu_event and pmu_metric,
however, both structures contained all the variables of event and
metric. This change removes the event variables from metric and the
metric variables from event.
Note, this change removes the
On Tue, Jan 24, 2023 at 10:09:56PM -0800, Song Liu wrote:
> > @@ -514,9 +515,18 @@ static int restore_r2(const char *name, u32
> > *instruction, struct module *me)
> > if (!instr_is_relative_link_branch(ppc_inst(*prev_insn)))
> > return 0;
> >
> > - if (*instruction !
> On 20-Jan-2023, at 7:58 PM, Arnaldo Carvalho de Melo wrote:
>
> Em Fri, Jan 20, 2023 at 05:32:56PM +0530, Athira Rajeev escreveu:
>> While parsing the tracepoint events in parse_events_add_tracepoint()
>> function, code checks for HAVE_LIBTRACEEVENT support. This is needed
>> since libtracee
Hi,
Le 15/09/2022 à 12:15, Ganesh a écrit :
> On 9/2/22 05:49, Jason Gunthorpe wrote:
>
>> On Tue, Aug 16, 2022 at 08:57:13AM +0530, Ganesh Goudar wrote:
>>> Hi,
>>>
>>> EEH reocvery is currently serialized and these patches shorten
>>> the time taken for EEH recovery by making the recovery to ru
On Tue 2023-01-24 19:38:05, Josh Poimboeuf wrote:
> When a module with a livepatched function is unloaded and then reloaded,
> klp attempts to dynamically re-patch it. On ppc64, that fails with the
> following error:
>
> module_64: livepatch_nfsd: Expected nop after call, got e8410018 at
> e_s
On Tue 2023-01-24 19:38:04, Josh Poimboeuf wrote:
> restore_r2() returns 1 on success, which is surprising for a non-boolean
> function. Change it to return 0 on success and -errno on error to match
> kernel coding convention.
>
> Signed-off-by: Josh Poimboeuf
Looks good:
Reviewed-by: Petr Mla
Andrew Donnellan writes:
> A number of structures and buffers passed to PKS hcalls have alignment
> requirements, which could on occasion cause problems:
>
> - Authorisation structures must be 16-byte aligned and must not cross a
> page boundary
>
> - Label structures must not cross page boundar
On Wed 25-01-23 00:38:51, Suren Baghdasaryan wrote:
> mmap_assert_write_locked() is used in vm_flags modifiers. Because
> mmap_assert_write_locked() uses dump_mm() and vm_flags are sometimes
> modified from from inside a module, it's necessary to export
> dump_mm() function.
>
> Signed-off-by: Sur
On Wed 25-01-23 00:38:50, Suren Baghdasaryan wrote:
> In cases when VMA flags are modified after VMA was isolated and mmap_lock
> was downgraded, flags modifications would result in an assertion because
> mmap write lock is not held.
> Introduce mod_vm_flags_nolock to be used in such situation.
> P
On Wed 25-01-23 00:38:49, Suren Baghdasaryan wrote:
> Replace indirect modifications to vma->vm_flags with calls to modifier
> functions to be able to track flag changes and to keep vma locking
> correctness. Add a BUG_ON check in ksm_madvise() to catch indirect
> vm_flags modification attempts.
T
On Wed, Jan 25, 2023 at 12:38:46AM -0800, Suren Baghdasaryan wrote:
> diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
> index 2d6d790d9bed..6c7c70bf50dd 100644
> --- a/include/linux/mm_types.h
> +++ b/include/linux/mm_types.h
> @@ -491,7 +491,13 @@ struct vm_area_struct {
>
On Wed 25-01-23 00:38:47, Suren Baghdasaryan wrote:
> To simplify the usage of VM_LOCKED_CLEAR_MASK in clear_vm_flags(),
> replace it with VM_LOCKED_MASK bitmask and convert all users.
>
> Signed-off-by: Suren Baghdasaryan
Acked-by: Michal Hocko
> ---
> include/linux/mm.h | 4 ++--
> kernel/fo
On Wed 25-01-23 00:38:46, Suren Baghdasaryan wrote:
> vm_flags are among VMA attributes which affect decisions like VMA merging
> and splitting. Therefore all vm_flags modifications are performed after
> taking exclusive mmap_lock to prevent vm_flags updates racing with such
> operations. Introduce
mmap_assert_write_locked() is used in vm_flags modifiers. Because
mmap_assert_write_locked() uses dump_mm() and vm_flags are sometimes
modified from from inside a module, it's necessary to export
dump_mm() function.
Signed-off-by: Suren Baghdasaryan
---
mm/debug.c | 1 +
1 file changed, 1 insert
In cases when VMA flags are modified after VMA was isolated and mmap_lock
was downgraded, flags modifications would result in an assertion because
mmap write lock is not held.
Introduce mod_vm_flags_nolock to be used in such situation.
Pass a hint to untrack_pfn to conditionally use mod_vm_flags_no
Replace indirect modifications to vma->vm_flags with calls to modifier
functions to be able to track flag changes and to keep vma locking
correctness. Add a BUG_ON check in ksm_madvise() to catch indirect
vm_flags modification attempts.
Signed-off-by: Suren Baghdasaryan
---
arch/powerpc/kvm/book
Replace direct modifications to vma->vm_flags with calls to modifier
functions to be able to track flag changes and to keep vma locking
correctness.
Signed-off-by: Suren Baghdasaryan
---
arch/arm/kernel/process.c | 2 +-
arch/ia64/mm/init.c
To simplify the usage of VM_LOCKED_CLEAR_MASK in clear_vm_flags(),
replace it with VM_LOCKED_MASK bitmask and convert all users.
Signed-off-by: Suren Baghdasaryan
---
include/linux/mm.h | 4 ++--
kernel/fork.c | 2 +-
mm/hugetlb.c | 4 ++--
mm/mlock.c | 6 +++---
mm/mmap.c
This patchset was originally published as a part of per-VMA locking [1] and
was split after suggestion that it's viable on its own and to facilitate
the review process. It is now a preprequisite for the next version of per-VMA
lock patchset, which reuses vm_flags modifier functions to lock the VMA
vm_flags are among VMA attributes which affect decisions like VMA merging
and splitting. Therefore all vm_flags modifications are performed after
taking exclusive mmap_lock to prevent vm_flags updates racing with such
operations. Introduce modifier functions for vm_flags to be used whenever
flags a
Benjamin Gray writes:
> Converts the BUILD_BUG to a WARN to allow building with a low/unoptimised
> compiler.
>
> The original expectation was that a compiler would see that the only
> usage of this function was in a function that is only called behind
> radix-only guards. And it worked this way o
Le 24/01/2023 à 22:54, Benjamin Gray a écrit :
> Converts the BUILD_BUG to a WARN to allow building with a low/unoptimised
> compiler.
No no no no. Please don't do that.
That approach is used everywhere in the kernel, why should it be a
problem only for local_flush_tlb_page_psize() and not eve
On Fri, 06 Jan 2023 16:17:46 +0100,
Dawei Li wrote:
>
> Since commit fc7a6209d571 ("bus: Make remove callback return void")
> forces bus_type::remove be void-returned, it doesn't make much sense
> for any bus based driver implementing remove callbalk to return
> non-void to its caller.
>
> As suc
"Naveen N. Rao" writes:
> Sathvika Vasireddy wrote:
>>
> arch/powerpc/kvm/booke.o: warning: objtool: kvmppc_fill_pt_regs+0x30:
> unannotated intra-function call
>>
>> As an attempt to fix it, I tried expanding ANNOTATE_INTRA_FUNCTION_CALL
>> macro to indicate that the branch target is
Le 22/01/2023 à 12:19, Pali Rohár a écrit :
> On Saturday 24 December 2022 18:44:52 Pali Rohár wrote:
>> On Thursday 08 December 2022 19:57:39 Christophe Leroy wrote:
>>> Le 08/12/2022 à 20:16, Pali Rohár a écrit :
On Sunday 28 August 2022 17:43:53 Christophe Leroy wrote:
> Le 28/08/2022
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