From: Tejun Heo <tj@kernel.org>
To: Christian Brauner <brauner@kernel.org>
Cc: Song Liu <song@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
bpf@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org, kernel-team@meta.com,
andrii@kernel.org, eddyz87@gmail.com, ast@kernel.org,
daniel@iogearbox.net, martin.lau@linux.dev,
viro@zeniv.linux.org.uk, jack@suse.cz, kpsingh@kernel.org,
mattbobrowski@google.com, amir73il@gmail.com,
daan.j.demeyer@gmail.com
Subject: Re: [PATCH bpf-next 1/4] kernfs: Add __kernfs_xattr_get for RCU protected access
Date: Fri, 20 Jun 2025 16:38:01 -1000 [thread overview]
Message-ID: <aFYbCVRZyyoOXYa-@slm.duckdns.org> (raw)
In-Reply-To: <20250619-kaulquappen-absagen-27377e154bc0@brauner>
On Thu, Jun 19, 2025 at 12:01:19PM +0200, Christian Brauner wrote:
> From bdc53435a1cd5c456dc28d8239eff0e7fa4e8dda Mon Sep 17 00:00:00 2001
> From: Christian Brauner <brauner@kernel.org>
> Date: Thu, 19 Jun 2025 11:50:26 +0200
> Subject: [PATCH] kernfs: remove iattr_mutex
>
> All allocations of struct kernfs_iattrs are serialized through a global
> mutex. Simply do a racy allocation and let the first one win. I bet most
> callers are under inode->i_rwsem anyway and it wouldn't be needed but
> let's not require that.
>
> Signed-off-by: Christian Brauner <brauner@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Thanks.
--
tejun
next prev parent reply other threads:[~2025-06-21 2:38 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-18 23:37 [PATCH bpf-next 0/4] Introduce bpf_kernfs_read_xattr Song Liu
2025-06-18 23:37 ` [PATCH bpf-next 1/4] kernfs: Add __kernfs_xattr_get for RCU protected access Song Liu
2025-06-19 10:01 ` Christian Brauner
2025-06-19 10:33 ` Greg Kroah-Hartman
2025-06-19 15:33 ` Song Liu
2025-06-21 2:38 ` Tejun Heo [this message]
2025-06-19 13:57 ` kernel test robot
2025-06-18 23:37 ` [PATCH bpf-next 2/4] bpf: Introduce bpf_kernfs_read_xattr to read xattr of kernfs nodes Song Liu
2025-06-19 8:49 ` Christian Brauner
2025-06-18 23:37 ` [PATCH bpf-next 3/4] bpf: Mark cgroup_subsys_state->cgroup RCU safe Song Liu
2025-06-18 23:37 ` [PATCH bpf-next 4/4] selftests/bpf: Add tests for bpf_kernfs_read_xattr Song Liu
2025-06-19 0:43 ` [PATCH bpf-next 0/4] Introduce bpf_kernfs_read_xattr Tejun Heo
2025-06-19 8:48 ` Christian Brauner
2025-06-19 15:31 ` Song Liu
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