Date: Wed, 12 Jan 2000 23:17:41 -0800 (PST) From: Kirk McKusick <mckusick@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/contrib/softupdates ffs_softdep.c Message-ID: <200001130717.XAA08252@freefall.freebsd.org>
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mckusick 2000/01/12 23:17:41 PST
Modified files:
sys/contrib/softupdates ffs_softdep.c
Log:
A panic occurs during an fsync when a dirty block associated with
a vnode has not been written (which would clear certain of its
dependencies). The problems arises because fsync with MNT_NOWAIT
no longer pushes all the dirty blocks associated with a vnode. It
skips those that require rollbacks, since they will just get instantly
dirty again. Such skipped blocks are marked so that they will not be
skipped a second time (otherwise circular dependencies would never
clear). So, we fsync twice to ensure that everything will be written
at least once.
Revision Changes Path
1.48 +8 -5 src/sys/contrib/softupdates/ffs_softdep.c
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