From: Peter Zijlstra <peterz@infradead.org>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>,
fuse-devel@lists.linux.dev, linux-kernel@vger.kernel.org,
"Rafael J. Wysocki" <rafael@kernel.org>,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH v2] fuse: permit freezing while waiting for request answer
Date: Thu, 20 Aug 2026 10:49:33 +0200 [thread overview]
Message-ID: <20260820084933.GA4036497@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <CAJfpegu2wOG85R6KSvCwHOuxe2fWczA1KbrFcCZz=ofUch4K=w@mail.gmail.com>
On Wed, Aug 19, 2026 at 12:03:32PM +0200, Miklos Szeredi wrote:
> Why is this unsafe exactly? Does that unsafeness apply to
> filesystems? If so why do we allow freezing while blocked on
> sb_start_write()?
Getting frozen with lock A held, while another task is blocked on A in
an unfreezable state results in the system not being freezable.
IOW you deadlock the freeze.
next prev parent reply other threads:[~2026-08-20 8:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-19 2:35 [PATCH v2] fuse: permit freezing while waiting for request answer Sergey Senozhatsky
2026-08-19 10:03 ` Miklos Szeredi
2026-08-20 4:57 ` Sergey Senozhatsky
2026-08-20 8:49 ` Peter Zijlstra [this message]
2026-08-20 9:07 ` Sergey Senozhatsky
2026-08-20 9:10 ` Peter Zijlstra
2026-08-20 9:24 ` Sergey Senozhatsky
2026-08-20 9:34 ` Peter Zijlstra
2026-08-20 9:47 ` Sergey Senozhatsky
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