* + percpu-scoped-objcg-protection.patch added to mm-unstable branch
@ 2023-09-29 18:42 Andrew Morton
0 siblings, 0 replies; 4+ messages in thread
From: Andrew Morton @ 2023-09-29 18:42 UTC (permalink / raw)
To: mm-commits, vbabka, shakeelb, rientjes, muchun.song, mhocko,
hannes, dennis, roman.gushchin, akpm
The patch titled
Subject: percpu: scoped objcg protection
has been added to the -mm mm-unstable branch. Its filename is
percpu-scoped-objcg-protection.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/percpu-scoped-objcg-protection.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Roman Gushchin <roman.gushchin@linux.dev>
Subject: percpu: scoped objcg protection
Date: Fri, 29 Sep 2023 11:00:55 -0700
Similar to slab and kmem, switch to a scope-based protection of the
objcg pointer to avoid.
Link: https://lkml.kernel.org/r/20230929180056.1122002-6-roman.gushchin@linux.dev
Signed-off-by: Roman Gushchin (Cruise) <roman.gushchin@linux.dev>
Cc: David Rientjes <rientjes@google.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/percpu.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
--- a/mm/percpu.c~percpu-scoped-objcg-protection
+++ a/mm/percpu.c
@@ -1628,14 +1628,12 @@ static bool pcpu_memcg_pre_alloc_hook(si
if (!memcg_kmem_online() || !(gfp & __GFP_ACCOUNT))
return true;
- objcg = get_obj_cgroup_from_current();
+ objcg = current_obj_cgroup();
if (!objcg)
return true;
- if (obj_cgroup_charge(objcg, gfp, pcpu_obj_full_size(size))) {
- obj_cgroup_put(objcg);
+ if (obj_cgroup_charge(objcg, gfp, pcpu_obj_full_size(size)))
return false;
- }
*objcgp = objcg;
return true;
@@ -1649,6 +1647,7 @@ static void pcpu_memcg_post_alloc_hook(s
return;
if (likely(chunk && chunk->obj_cgroups)) {
+ obj_cgroup_get(objcg);
chunk->obj_cgroups[off >> PCPU_MIN_ALLOC_SHIFT] = objcg;
rcu_read_lock();
@@ -1657,7 +1656,6 @@ static void pcpu_memcg_post_alloc_hook(s
rcu_read_unlock();
} else {
obj_cgroup_uncharge(objcg, pcpu_obj_full_size(size));
- obj_cgroup_put(objcg);
}
}
_
Patches currently in -mm which might be from roman.gushchin@linux.dev are
mm-kmem-optimize-get_obj_cgroup_from_current.patch
mm-kmem-add-direct-objcg-pointer-to-task_struct.patch
mm-kmem-make-memcg-keep-a-reference-to-the-original-objcg.patch
mm-kmem-scoped-objcg-protection.patch
percpu-scoped-objcg-protection.patch
^ permalink raw reply [flat|nested] 4+ messages in thread
* + percpu-scoped-objcg-protection.patch added to mm-unstable branch
@ 2023-10-10 18:21 Andrew Morton
0 siblings, 0 replies; 4+ messages in thread
From: Andrew Morton @ 2023-10-10 18:21 UTC (permalink / raw)
To: mm-commits, vbabka, shakeelb, rientjes, naresh.kamboju,
muchun.song, mhocko, hannes, dennis, roman.gushchin, akpm
The patch titled
Subject: percpu: scoped objcg protection
has been added to the -mm mm-unstable branch. Its filename is
percpu-scoped-objcg-protection.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/percpu-scoped-objcg-protection.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Roman Gushchin <roman.gushchin@linux.dev>
Subject: percpu: scoped objcg protection
Date: Mon, 9 Oct 2023 17:09:29 -0700
Similar to slab and kmem, switch to a scope-based protection of the
objcg pointer to avoid.
Link: https://lkml.kernel.org/r/20231010000929.450702-6-roman.gushchin@linux.dev
Signed-off-by: Roman Gushchin (Cruise) <roman.gushchin@linux.dev>
Cc: David Rientjes <rientjes@google.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/percpu.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
--- a/mm/percpu.c~percpu-scoped-objcg-protection
+++ a/mm/percpu.c
@@ -1628,14 +1628,12 @@ static bool pcpu_memcg_pre_alloc_hook(si
if (!memcg_kmem_online() || !(gfp & __GFP_ACCOUNT))
return true;
- objcg = get_obj_cgroup_from_current();
+ objcg = current_obj_cgroup();
if (!objcg)
return true;
- if (obj_cgroup_charge(objcg, gfp, pcpu_obj_full_size(size))) {
- obj_cgroup_put(objcg);
+ if (obj_cgroup_charge(objcg, gfp, pcpu_obj_full_size(size)))
return false;
- }
*objcgp = objcg;
return true;
@@ -1649,6 +1647,7 @@ static void pcpu_memcg_post_alloc_hook(s
return;
if (likely(chunk && chunk->obj_cgroups)) {
+ obj_cgroup_get(objcg);
chunk->obj_cgroups[off >> PCPU_MIN_ALLOC_SHIFT] = objcg;
rcu_read_lock();
@@ -1657,7 +1656,6 @@ static void pcpu_memcg_post_alloc_hook(s
rcu_read_unlock();
} else {
obj_cgroup_uncharge(objcg, pcpu_obj_full_size(size));
- obj_cgroup_put(objcg);
}
}
_
Patches currently in -mm which might be from roman.gushchin@linux.dev are
mm-kmem-optimize-get_obj_cgroup_from_current.patch
mm-kmem-add-direct-objcg-pointer-to-task_struct.patch
mm-kmem-make-memcg-keep-a-reference-to-the-original-objcg.patch
mm-kmem-scoped-objcg-protection.patch
percpu-scoped-objcg-protection.patch
^ permalink raw reply [flat|nested] 4+ messages in thread
* + percpu-scoped-objcg-protection.patch added to mm-unstable branch
@ 2023-10-16 22:58 Andrew Morton
0 siblings, 0 replies; 4+ messages in thread
From: Andrew Morton @ 2023-10-16 22:58 UTC (permalink / raw)
To: mm-commits, vbabka, shakeelb, rientjes, naresh.kamboju,
muchun.song, mhocko, hannes, dennis, roman.gushchin, akpm
The patch titled
Subject: percpu: scoped objcg protection
has been added to the -mm mm-unstable branch. Its filename is
percpu-scoped-objcg-protection.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/percpu-scoped-objcg-protection.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Roman Gushchin <roman.gushchin@linux.dev>
Subject: percpu: scoped objcg protection
Date: Mon, 16 Oct 2023 15:19:00 -0700
Similar to slab and kmem, switch to a scope-based protection of the objcg
pointer to avoid.
Link: https://lkml.kernel.org/r/20231016221900.4031141-6-roman.gushchin@linux.dev
Signed-off-by: Roman Gushchin (Cruise) <roman.gushchin@linux.dev>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Acked-by: Shakeel Butt <shakeelb@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/percpu.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
--- a/mm/percpu.c~percpu-scoped-objcg-protection
+++ a/mm/percpu.c
@@ -1628,14 +1628,12 @@ static bool pcpu_memcg_pre_alloc_hook(si
if (!memcg_kmem_online() || !(gfp & __GFP_ACCOUNT))
return true;
- objcg = get_obj_cgroup_from_current();
+ objcg = current_obj_cgroup();
if (!objcg)
return true;
- if (obj_cgroup_charge(objcg, gfp, pcpu_obj_full_size(size))) {
- obj_cgroup_put(objcg);
+ if (obj_cgroup_charge(objcg, gfp, pcpu_obj_full_size(size)))
return false;
- }
*objcgp = objcg;
return true;
@@ -1649,6 +1647,7 @@ static void pcpu_memcg_post_alloc_hook(s
return;
if (likely(chunk && chunk->obj_cgroups)) {
+ obj_cgroup_get(objcg);
chunk->obj_cgroups[off >> PCPU_MIN_ALLOC_SHIFT] = objcg;
rcu_read_lock();
@@ -1657,7 +1656,6 @@ static void pcpu_memcg_post_alloc_hook(s
rcu_read_unlock();
} else {
obj_cgroup_uncharge(objcg, pcpu_obj_full_size(size));
- obj_cgroup_put(objcg);
}
}
_
Patches currently in -mm which might be from roman.gushchin@linux.dev are
mm-kmem-optimize-get_obj_cgroup_from_current.patch
mm-kmem-add-direct-objcg-pointer-to-task_struct.patch
mm-kmem-make-memcg-keep-a-reference-to-the-original-objcg.patch
mm-kmem-scoped-objcg-protection.patch
percpu-scoped-objcg-protection.patch
^ permalink raw reply [flat|nested] 4+ messages in thread
* + percpu-scoped-objcg-protection.patch added to mm-unstable branch
@ 2023-10-20 17:11 Andrew Morton
0 siblings, 0 replies; 4+ messages in thread
From: Andrew Morton @ 2023-10-20 17:11 UTC (permalink / raw)
To: mm-commits, vbabka, shakeelb, rientjes, naresh.kamboju,
muchun.song, mhocko, hannes, dennis, roman.gushchin, akpm
The patch titled
Subject: percpu: scoped objcg protection
has been added to the -mm mm-unstable branch. Its filename is
percpu-scoped-objcg-protection.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/percpu-scoped-objcg-protection.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Roman Gushchin <roman.gushchin@linux.dev>
Subject: percpu: scoped objcg protection
Date: Thu, 19 Oct 2023 15:53:45 -0700
Similar to slab and kmem, switch to a scope-based protection of the objcg
pointer to avoid.
Link: https://lkml.kernel.org/r/20231019225346.1822282-6-roman.gushchin@linux.dev
Signed-off-by: Roman Gushchin (Cruise) <roman.gushchin@linux.dev>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Acked-by: Shakeel Butt <shakeelb@google.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/percpu.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
--- a/mm/percpu.c~percpu-scoped-objcg-protection
+++ a/mm/percpu.c
@@ -1628,14 +1628,12 @@ static bool pcpu_memcg_pre_alloc_hook(si
if (!memcg_kmem_online() || !(gfp & __GFP_ACCOUNT))
return true;
- objcg = get_obj_cgroup_from_current();
+ objcg = current_obj_cgroup();
if (!objcg)
return true;
- if (obj_cgroup_charge(objcg, gfp, pcpu_obj_full_size(size))) {
- obj_cgroup_put(objcg);
+ if (obj_cgroup_charge(objcg, gfp, pcpu_obj_full_size(size)))
return false;
- }
*objcgp = objcg;
return true;
@@ -1649,6 +1647,7 @@ static void pcpu_memcg_post_alloc_hook(s
return;
if (likely(chunk && chunk->obj_cgroups)) {
+ obj_cgroup_get(objcg);
chunk->obj_cgroups[off >> PCPU_MIN_ALLOC_SHIFT] = objcg;
rcu_read_lock();
@@ -1657,7 +1656,6 @@ static void pcpu_memcg_post_alloc_hook(s
rcu_read_unlock();
} else {
obj_cgroup_uncharge(objcg, pcpu_obj_full_size(size));
- obj_cgroup_put(objcg);
}
}
_
Patches currently in -mm which might be from roman.gushchin@linux.dev are
mm-kmem-optimize-get_obj_cgroup_from_current.patch
mm-kmem-add-direct-objcg-pointer-to-task_struct.patch
mm-kmem-make-memcg-keep-a-reference-to-the-original-objcg.patch
mm-kmem-scoped-objcg-protection.patch
percpu-scoped-objcg-protection.patch
mm-kmem-reimplement-get_obj_cgroup_from_current.patch
^ permalink raw reply [flat|nested] 4+ messages in thread
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