CVS commit: src/sys/kern

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

Module Name:    src
Committed By:   bouyer
Date:           Thu Jan 14 22:41:53 UTC 2010

Modified Files:
        src/sys/kern: vfs_subr.c

Log Message:
Remove KASSERT(vp->v_usecount == 1) in getnewvnode() and ungetnewvnode().
Another process could be vget()ing the vnode and bump v_usecount while
getcleanvnode() is vclean()ing it (as vclean drops the interlock).
vget() will then wait for VI_XLOCK or VI_FREEING to clear; and we could test
this assertion while the other process is still slepping. We could even
end up in ungetnewvnode() before this other process got a chance to run.


To generate a diff of this commit:
cvs rdiff -u -r1.395 -r1.396 src/sys/kern/vfs_subr.c

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