linux-kernel - Re: [PATCH 5.15] fuse: Fix race condition in writethrough path A race

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Message-ID: <CAJfpegvkJQ2eW4dpkKApyGSwuXDw8s3+Z1iPH+uBO-AuGpfReQ@mail.gmail.com>
Date: Tue, 14 Oct 2025 18:10:45 +0200
From: Miklos Szeredi <miklos@...redi.hu>
To: Brian Foster <bfoster@...hat.com>
Cc: lu gu <giveme.gulu@...il.com>, Joanne Koong <joannelkoong@...il.com>, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Bernd Schubert <bernd@...ernd.com>
Subject: Re: [PATCH 5.15] fuse: Fix race condition in writethrough path A race

On Tue, 14 Oct 2025 at 15:57, Brian Foster <bfoster@...hat.com> wrote:

> But TBH, if the writeback thing or something similarly simple works for
> resolving the immediate bug, I wouldnt worry too much about it
> until/unless there are userspace fs' explicitly looking for that sort of
> behavior. Just my .02.

Agreed.

I just feel it unfortunate that this is default in libfuse and so many
filesystems will have auto_inval_data enabled which don't even need
it, and some mixed read-write workloads suffering badly as a
consequence.

Thanks,
Miklos