Author: kmacy
Date: Sat Jan 28 17:41:42 2012
New Revision: 230647
URL: http://svn.freebsd.org/changeset/base/230647
Log:
add tunable for developers working on areas outside of ZFS
to further reduce core size by excluding ARC metadata buffers
from core dumps
Modified:
head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c
Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c Sat Jan 28
17:27:58 2012 (r230646)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c Sat Jan 28
17:41:42 2012 (r230647)
@@ -42,6 +42,10 @@ static int zio_use_uma = 0;
TUNABLE_INT("vfs.zfs.zio.use_uma", &zio_use_uma);
SYSCTL_INT(_vfs_zfs_zio, OID_AUTO, use_uma, CTLFLAG_RDTUN, &zio_use_uma, 0,
"Use uma(9) for ZIO allocations");
+static int zio_exclude_metadata = 0;
+TUNABLE_INT("vfs.zfs.zio.exclude_metadata", &zio_exclude_metadata);
+SYSCTL_INT(_vfs_zfs_zio, OID_AUTO, exclude_metadata, CTLFLAG_RDTUN,
&zio_exclude_metadata, 0,
+ "Exclude metadata buffers from dumps as well");
/*
* ==========================================================================
@@ -217,13 +221,14 @@ void *
zio_buf_alloc(size_t size)
{
size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
+ int flags = zio_exclude_metadata ? KM_NODEBUG : 0;
ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
if (zio_use_uma)
return (kmem_cache_alloc(zio_buf_cache[c], KM_PUSHPAGE));
else
- return (kmem_alloc(size, KM_SLEEP));
+ return (kmem_alloc(size, KM_SLEEP|flags));
}
/*
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