Date: Sat, 13 Feb 2010 10:34:50 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/ufs/ffs ffs_alloc.c Message-ID: <201002131035.o1DAZ3rr003466@repoman.freebsd.org>
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kib 2010-02-13 10:34:50 UTC
FreeBSD src repository
Modified files:
sys/ufs/ffs ffs_alloc.c
Log:
SVN rev 203818 on 2010-02-13 10:34:50Z by kib
When ffs_realloccg() failed to allocate bigger fragment and, because
pending blocks are scheduled for removal, goes to retry the (re)allocation,
clear the bp pointer. It might happen that meantime free space is really
exhausted and we are entering nospace: label without bread()ing buffer,
causing stale bp value to be brelse()d again.
Tested by: pho
(Producing a scenario to reliably reproduce the
race appeared to be much harder then fixing the bug)
MFC after: 1 week
Revision Changes Path
1.157 +3 -1 src/sys/ufs/ffs/ffs_alloc.c
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