cvs commit: src/sys/kern vfs_mount.c
dillon at crater.dragonflybsd.org
Tue Feb 8 18:53:10 PST 2005
dillon 2005/02/08 18:51:04 PST
DragonFly src repository
Fix a case that can prevent the vnlru_proc vnode recycler from operating.
The vnode recycler is not allowed to recycle 'internal' directory nodes
in the namecache topology. i.e. if the path A/B/C/D is cached, then the
recycler is not allowed to remove A, B, or C. The recycler checks
this condition by checking the vnode's v_holdcnt. The recycler also tries
to recycle vnodes with little or no cached data rather then the vnodes
with a great deal of cached data.
However, the buffer cache now uses v_holdcnt as well. If the buffer cache
is large enough and maxvnodes is small enough the recycler can wind up not
finding any vnodes to recycle.
The fix is clean out the buffers with the candidate vnode and then make a
final v_holdcnt check.
Reported-by: Gary Allan <dragonfly at xxxxxxxxxxxxxxx>
Revision Changes Path
1.7 +57 -4 src/sys/kern/vfs_mount.c
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