[Bug 269261] data corruption with fspacectl and mmap

In reply to: bugzilla-noreply_a_freebsd.org: "[Bug 269261] data corruption with fspacectl and mmap"
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From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 04 Feb 2023 17:05:42 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=269261

--- Comment #5 from Alan Somers <asomers@FreeBSD.org> ---
(In reply to Konstantin Belousov from comment #4)
Kib's patch looks good for UFS.  However, I've determined that the corruption
in fusefs has a different root cause.  And it's more general, too.  It can be
triggered by mmap()ing a file, then setting O_DIRECT and doing a write.  It
doesn't require fspacectl.  Going forward, let's restrict this bug to
discussion of UFS.

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