[Bug 276002] nfscl: data corruption using both copy_file_range and mmap'd I/O

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From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 30 Dec 2023 18:02:24 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276002

--- Comment #22 from Konstantin Belousov <kib@FreeBSD.org> ---
(In reply to Rick Macklem from comment #21)
It would be very strange if this patch helped.  More, I think it is somewhat
dangerous because it can cause data corruption on itself.

Issue is, not clearing pages dirty bits also does not remove write perms from
the existing mappings, allowing writers to continue write to the file mappings.
I think that this allows more mapped writes to be lost.

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