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From: Kip Macy <kmacy@FreeBSD.org>
Date: Sun, 15 Nov 2009 23:53:10 +0000 (UTC)
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Cc:
Subject: svn commit: r199303 -
user/kmacy/releng_8_fcs_buf/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
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X-List-Received-Date: Sun, 15 Nov 2009 23:53:10 -0000
Author: kmacy
Date: Sun Nov 15 23:53:09 2009
New Revision: 199303
URL: http://svn.freebsd.org/changeset/base/199303
Log:
make tunable for disabling freeing of buffers to the page cache
Modified:
user/kmacy/releng_8_fcs_buf/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
Modified: user/kmacy/releng_8_fcs_buf/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
==============================================================================
--- user/kmacy/releng_8_fcs_buf/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Sun Nov 15 23:51:59 2009 (r199302)
+++ user/kmacy/releng_8_fcs_buf/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Sun Nov 15 23:53:09 2009 (r199303)
@@ -187,7 +187,9 @@ SYSCTL_QUAD(_vfs_zfs, OID_AUTO, arc_min,
SYSCTL_INT(_vfs_zfs, OID_AUTO, mdcomp_disable, CTLFLAG_RDTUN,
&zfs_mdcomp_disable, 0, "Disable metadata compression");
-static int page_cache_disable = 1;
+static int zfs_page_cache_disable = 0;
+SYSCTL_INT(_vfs_zfs, OID_AUTO, page_cache_disable, CTLFLAG_RDTUN,
+ &zfs_page_cache_disable, 0, "Disable backing ARC with page cache ");
#ifdef ZIO_USE_UMA
extern kmem_cache_t *zio_buf_cache[];
@@ -1389,7 +1391,7 @@ arc_getblk(arc_buf_t *buf)
data = zio_buf_alloc(size);
} else if ((buf->b_hdr->b_flags & ARC_BUF_CLONING) ||
BUF_EMPTY(buf->b_hdr) ||
- page_cache_disable) {
+ zfs_page_cache_disable) {
newbp = geteblk(size, flags);
data = newbp->b_data;
} else {
@@ -1402,7 +1404,7 @@ arc_getblk(arc_buf_t *buf)
if ((buf->b_hdr->b_flags & ARC_BUF_CLONING) &&
(size >= PAGE_SIZE) &&
(!BUF_EMPTY(buf->b_hdr)) &&
- !page_cache_disable)
+ !zfs_page_cache_disable)
arc_binval(buf, blkno, vp, size, flags, newbp);
buf->b_hdr->b_flags &= ~ARC_BUF_CLONING;
@@ -3474,7 +3476,7 @@ arc_write_done(zio_t *zio)
(bp != NULL) &&
(bp->b_bufobj == NULL) &&
(bp->b_bcount >= PAGE_SIZE) &&
- !page_cache_disable) {
+ !zfs_page_cache_disable) {
arc_binval(buf, blkno, vp, bp->b_bcount, 0, bp);
}