Author: alc
Date: Thu Feb 3 14:42:46 2011
New Revision: 218223
URL: http://svn.freebsd.org/changeset/base/218223
Log:
Eliminate unnecessary page hold_count checks. These checks predate
r90944, which introduced a general mechanism for handling the freeing
of held pages.
Reviewed by: kib@
Modified:
head/sys/kern/uipc_syscalls.c
head/sys/kern/vfs_bio.c
Modified: head/sys/kern/uipc_syscalls.c
==============================================================================
--- head/sys/kern/uipc_syscalls.c Thu Feb 3 13:10:13 2011
(r218222)
+++ head/sys/kern/uipc_syscalls.c Thu Feb 3 14:42:46 2011
(r218223)
@@ -2115,8 +2115,7 @@ retry_space:
* then free it.
*/
if (pg->wire_count == 0 && pg->valid == 0 &&
- pg->busy == 0 && !(pg->oflags & VPO_BUSY) &&
- pg->hold_count == 0)
+ pg->busy == 0 && !(pg->oflags & VPO_BUSY))
vm_page_free(pg);
vm_page_unlock(pg);
VM_OBJECT_UNLOCK(obj);
Modified: head/sys/kern/vfs_bio.c
==============================================================================
--- head/sys/kern/vfs_bio.c Thu Feb 3 13:10:13 2011 (r218222)
+++ head/sys/kern/vfs_bio.c Thu Feb 3 14:42:46 2011 (r218223)
@@ -1647,8 +1647,7 @@ vfs_vmio_release(struct buf *bp)
* no valid data. We also free the page if the
* buffer was used for direct I/O
*/
- if ((bp->b_flags & B_ASYNC) == 0 && !m->valid &&
- m->hold_count == 0) {
+ if ((bp->b_flags & B_ASYNC) == 0 && !m->valid) {
vm_page_free(m);
} else if (bp->b_flags & B_DIRECT) {
vm_page_try_to_free(m);
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