From: Chris Down <chris@chrisdown.name>
To: Daniel Xu <dxu@dxuuu.xyz>
Cc: cgroups@vger.kernel.org, tj@kernel.org, lizefan@huawei.com,
hannes@cmpxchg.org, viro@zeniv.linux.org.uk, shakeelb@google.com,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
gregkh@linuxfoundation.org, kernel-team@fb.com
Subject: Re: [PATCH v3 0/4] Support user xattrs in cgroupfs
Date: Fri, 13 Mar 2020 01:00:57 +0000 [thread overview]
Message-ID: <20200313010057.GB24320@chrisdown.name> (raw)
In-Reply-To: <20200312200317.31736-1-dxu@dxuuu.xyz>
Daniel Xu writes:
>User extended attributes are useful as metadata storage for kernfs
>consumers like cgroups. Especially in the case of cgroups, it is useful
>to have a central metadata store that multiple processes/services can
>use to coordinate actions.
>
>A concrete example is for userspace out of memory killers. We want to
>let delegated cgroup subtree owners (running as non-root) to be able to
>say "please avoid killing this cgroup". This is especially important for
>desktop linux as delegated subtrees owners are less likely to run as
>root.
>
>The first two commits set up some stuff for the third commit which
>intro introduce a new flag, KERNFS_ROOT_SUPPORT_USER_XATTR,
>that lets kernfs consumers enable user xattr support. The final commit
>turns on user xattr support for cgroupfs.
The whole series looks good to me, thanks.
For the whole series:
Acked-by: Chris Down <chris@chrisdown.name>
prev parent reply other threads:[~2020-03-13 1:00 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-12 20:03 [PATCH v3 0/4] Support user xattrs in cgroupfs Daniel Xu
2020-03-12 20:03 ` [PATCH v3 1/4] kernfs: kvmalloc xattr value instead of kmalloc Daniel Xu
[not found] ` <20200312200317.31736-2-dxu-zUS5+7O8QwqlVyrhU4qvOw@public.gmane.org>
2020-03-12 21:03 ` Shakeel Butt
2020-03-12 21:03 ` Shakeel Butt
2020-03-12 21:09 ` Andreas Dilger
2020-03-12 21:09 ` Andreas Dilger
2020-03-12 20:03 ` [PATCH v3 2/4] kernfs: Add removed_size out param for simple_xattr_set Daniel Xu
2020-03-12 20:03 ` [PATCH v3 3/4] kernfs: Add option to enable user xattrs Daniel Xu
2020-03-12 20:03 ` [PATCH v3 4/4] cgroupfs: Support " Daniel Xu
2020-03-12 20:09 ` [PATCH v3 0/4] Support user xattrs in cgroupfs Daniel Xu
2020-03-12 20:09 ` Daniel Xu
[not found] ` <20200312200317.31736-1-dxu-zUS5+7O8QwqlVyrhU4qvOw@public.gmane.org>
2020-03-12 21:17 ` Tejun Heo
2020-03-12 21:17 ` Tejun Heo
[not found] ` <20200312211735.GA1967398-146+VewaZzwNjtGbbfXrCEEOCMrvLtNR@public.gmane.org>
2020-03-12 21:19 ` Tejun Heo
2020-03-12 21:19 ` Tejun Heo
2020-03-12 22:05 ` Greg KH
2020-03-12 22:05 ` Greg KH
2020-03-16 19:55 ` Tejun Heo
2020-03-16 19:55 ` Tejun Heo
2020-03-13 1:00 ` Chris Down [this message]
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