From: Roman Gushchin <guro@fb.com>
To: Vasily Averin <vvs@virtuozzo.com>
Cc: Michal Hocko <mhocko@suse.com>, <cgroups@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
Alexey Dobriyan <adobriyan@gmail.com>,
Shakeel Butt <shakeelb@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Vladimir Davydov <vdavydov.dev@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Dmitry Safonov <0x7f454c46@gmail.com>
Subject: Re: [PATCH 1/2] ipc sem: use kvmalloc for sem_undo allocation
Date: Mon, 26 Apr 2021 13:29:20 -0700 [thread overview]
Message-ID: <YIcioHGrtjFHoDej@carbon.dhcp.thefacebook.com> (raw)
In-Reply-To: <722774d8-d46b-f8a6-a88e-3c56b4968622@virtuozzo.com>
On Mon, Apr 26, 2021 at 01:18:09PM +0300, Vasily Averin wrote:
> size of sem_undo can exceed one page and with the maximum possible
> nsems = 32000 it can grow up to 64Kb. Let's switch its allocation
> to kvmalloc to avoid user-triggered disruptive actions like OOM killer
> in case of high-order memory shortage.
>
> Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Acked-by: Roman Gushchin <guro@fb.com>
next prev parent reply other threads:[~2021-04-26 20:29 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <e67f2a95-4b01-9db2-fe47-0b2210f0b138@virtuozzo.com>
2021-04-26 10:18 ` [PATCH 0/2] ipc: allocations cleanup Vasily Averin
2021-04-28 7:35 ` [PATCH v2 " Vasily Averin
2021-04-28 7:35 ` [PATCH v2 1/2] ipc sem: use kvmalloc for sem_undo allocation Vasily Averin
2021-04-28 7:35 ` [PATCH v2 2/2] ipc: use kmalloc for msg_queue and shmid_kernel Vasily Averin
2021-04-26 10:18 ` [PATCH 1/2] ipc sem: use kvmalloc for sem_undo allocation Vasily Averin
2021-04-26 10:28 ` Michal Hocko
2021-04-26 16:22 ` Shakeel Butt
2021-04-26 20:29 ` Roman Gushchin [this message]
2021-04-26 10:18 ` [PATCH 2/2] ipc: use kmalloc for msg_queue and shmid_kernel Vasily Averin
2021-04-26 10:25 ` Michal Hocko
2021-04-28 5:15 ` Vasily Averin
2021-04-28 6:33 ` Michal Hocko
2021-04-26 16:23 ` Shakeel Butt
2021-04-26 20:29 ` Roman Gushchin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YIcioHGrtjFHoDej@carbon.dhcp.thefacebook.com \
--to=guro@fb.com \
--cc=0x7f454c46@gmail.com \
--cc=adobriyan@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=cgroups@vger.kernel.org \
--cc=hannes@cmpxchg.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mhocko@suse.com \
--cc=shakeelb@google.com \
--cc=vdavydov.dev@gmail.com \
--cc=vvs@virtuozzo.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).