CVS commit: [netbsd-5] src/sys/fs/puffs

[Soren Jacobsen <snj%netbsd.org@localhost>]

Module Name:    src
Committed By:   snj
Date:           Sat Jan  9 01:22:58 UTC 2010

Modified Files:
        src/sys/fs/puffs [netbsd-5]: puffs_msgif.c puffs_sys.h puffs_vfsops.c

Log Message:
Pull up following revision(s) (requested by pooka in ticket #1212):
        sys/fs/puffs/puffs_msgif.c: revision 1.76 via patch
        sys/fs/puffs/puffs_sys.h: revision 1.73 via patch
        sys/fs/puffs/puffs_vfsops.c: revision 1.84 via patch
Process flush requests from the file server in a separate thread
context.  This fixes a long-standing but seldomly seen deadlock,
where the kernel was holding pages busy (due to e.g. readahead
request) while waiting for the server to respond, and the server
made a callback into the kernel asking to invalidate those pages.
... or, well, theoretically fixes, since I didn't have any reliable
way of repeating the deadlock and I think I saw it only twice.


To generate a diff of this commit:
cvs rdiff -u -r1.72 -r1.72.4.1 src/sys/fs/puffs/puffs_msgif.c
cvs rdiff -u -r1.70 -r1.70.20.1 src/sys/fs/puffs/puffs_sys.h
cvs rdiff -u -r1.81 -r1.81.8.1 src/sys/fs/puffs/puffs_vfsops.c

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