CVS commit: src/sys/dev

["Manuel Bouyer" <bouyer%netbsd.org@localhost>]

Module Name:    src
Committed By:   bouyer
Date:           Wed Jan 28 15:08:12 UTC 2015

Modified Files:
        src/sys/dev: vnd.c

Log Message:
As discussed in
http://mail-index.netbsd.org/tech-kern/2015/01/24/msg018339.html
don't bump v_numoutput if we need to vn_lock() the vnode before queuing
the corresponding I/O, because this may deadlock with genfs_do_putpages()
when called with the vnode locked (as can happen with fsync(2)).
Instead bump is just before the last VOP_STRATEGY(), or before calling
nestiobuf_done().
Thanks to Taylor R Campbell for review.


To generate a diff of this commit:
cvs rdiff -u -r1.239 -r1.240 src/sys/dev/vnd.c

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