CVS commit: src/sys/ufs/lfs

["Maya Rashish" <maya%netbsd.org@localhost>]

Module Name:    src
Committed By:   maya
Date:           Thu Jun 15 14:37:31 UTC 2017

Modified Files:
        src/sys/ufs/lfs: lfs_segment.c

Log Message:
It isn't safe to drain dirops with seglock held, it'll deadlock if there
are any dirops. drain before grabbing seglock.

lfs_dirops == 0 is always true (as we already drained dirops), so omit
that part of the comparison.

Fixes a lot of LFS deadlocks. PR kern/52301

Many thanks to dholland for help analyzing coredumps


To generate a diff of this commit:
cvs rdiff -u -r1.271 -r1.272 src/sys/ufs/lfs/lfs_segment.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.