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Date:      Sun, 17 Sep 2017 17:57:23 +0000
From:      bugzilla-noreply@freebsd.org
To:        gecko@FreeBSD.org
Subject:   [Bug 222356] www/firefox: file-backed shared memory performance
Message-ID:  <bug-222356-21738-IQhLSsIAt6@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-222356-21738@https.bugs.freebsd.org/bugzilla/>
References:  <bug-222356-21738@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222356

--- Comment #5 from Konstantin Belousov <kib@FreeBSD.org> ---
(In reply to Tijl Coosemans from comment #4)
+J should make the amount of writes on close significantly larger.  +J solv=
es
the problem of leaked resources only, since the problem of the filesystem
metadata correctness is already solved by the SU part.  So +J must journal =
all
metadata objects which cannot be reached from the normal metadata accesses.=
  In
particular, all freed data blocks must be mentioned in the journal records
before cg bitmaps are allowed to be written.

The result is that +J at least doubles the amount of writes, and also the d=
ata
amount is O(file length) at least.

Again, your description does not make me see how my patch (which only affec=
ts
msync(2)) relates to the build failures.

--=20
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