The patch titled
Subject: memcg: enable accounting for ldt_struct objects
has been added to the -mm tree. Its filename is
memcg-enable-accounting-for-ldt_struct-objects.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/memcg-enable-accounting-for-ldt_struct-objects.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/memcg-enable-accounting-for-ldt_struct-objects.patch
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------------------------------------------------------
From: Vasily Averin <vvs@xxxxxxxxxxxxx>
Subject: memcg: enable accounting for ldt_struct objects
Each task can request own LDT and force the kernel to allocate up to 64Kb
memory per-mm.
There are legitimate workloads with hundreds of processes and there can be
hundreds of workloads running on large machines. The unaccounted memory
can cause isolation issues between the workloads particularly on highly
utilized machines.
It makes sense to account for this objects to restrict the host's memory
consumption from inside the memcg-limited container.
Link: https://lkml.kernel.org/r/38010594-50fe-c06d-7cb0-d1f77ca422f3@xxxxxxxxxxxxx
Signed-off-by: Vasily Averin <vvs@xxxxxxxxxxxxx>
Acked-by: Borislav Petkov <bp@xxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: Andrei Vagin <avagin@xxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Christian Brauner <christian.brauner@xxxxxxxxxx>
Cc: Dmitry Safonov <0x7f454c46@xxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "J. Bruce Fields" <bfields@xxxxxxxxxxxx>
Cc: Jeff Layton <jlayton@xxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Jiri Slaby <jirislaby@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Roman Gushchin <guro@xxxxxx>
Cc: Serge Hallyn <serge@xxxxxxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Cc: Yutian Yang <nglaive@xxxxxxxxx>
Cc: Zefan Li <lizefan.x@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/ldt.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/arch/x86/kernel/ldt.c~memcg-enable-accounting-for-ldt_struct-objects
+++ a/arch/x86/kernel/ldt.c
@@ -154,7 +154,7 @@ static struct ldt_struct *alloc_ldt_stru
if (num_entries > LDT_ENTRIES)
return NULL;
- new_ldt = kmalloc(sizeof(struct ldt_struct), GFP_KERNEL);
+ new_ldt = kmalloc(sizeof(struct ldt_struct), GFP_KERNEL_ACCOUNT);
if (!new_ldt)
return NULL;
@@ -168,9 +168,9 @@ static struct ldt_struct *alloc_ldt_stru
* than PAGE_SIZE.
*/
if (alloc_size > PAGE_SIZE)
- new_ldt->entries = vzalloc(alloc_size);
+ new_ldt->entries = __vmalloc(alloc_size, GFP_KERNEL_ACCOUNT | __GFP_ZERO);
else
- new_ldt->entries = (void *)get_zeroed_page(GFP_KERNEL);
+ new_ldt->entries = (void *)get_zeroed_page(GFP_KERNEL_ACCOUNT);
if (!new_ldt->entries) {
kfree(new_ldt);
_
Patches currently in -mm which might be from vvs@xxxxxxxxxxxxx are
memcg-enable-accounting-for-pids-in-nested-pid-namespaces.patch
memcg-enable-accounting-for-mnt_cache-entries.patch
memcg-enable-accounting-for-pollfd-and-select-bits-arrays.patch
memcg-enable-accounting-for-file-lock-caches.patch
memcg-enable-accounting-for-fasync_cache.patch
memcg-enable-accounting-for-new-namesapces-and-struct-nsproxy.patch
memcg-enable-accounting-of-ipc-resources.patch
memcg-enable-accounting-for-signals.patch
memcg-enable-accounting-for-posix_timers_cache-slab.patch
memcg-enable-accounting-for-tty-related-objects.patch
memcg-enable-accounting-for-ldt_struct-objects.patch
