Date: Wed, 17 Jun 2009 20:29:56 +0000 (UTC) From: Kip Macy <kmacy@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r194396 - user/kmacy/releng_7_2_fcs/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <200906172029.n5HKTuC5087269@svn.freebsd.org>
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Author: kmacy Date: Wed Jun 17 20:29:56 2009 New Revision: 194396 URL: http://svn.freebsd.org/changeset/base/194396 Log: don't block on pre-fetch Modified: user/kmacy/releng_7_2_fcs/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_zfetch.c Modified: user/kmacy/releng_7_2_fcs/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_zfetch.c ============================================================================== --- user/kmacy/releng_7_2_fcs/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_zfetch.c Wed Jun 17 20:28:07 2009 (r194395) +++ user/kmacy/releng_7_2_fcs/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_zfetch.c Wed Jun 17 20:29:56 2009 (r194396) @@ -305,7 +305,10 @@ dmu_zfetch_find(zfetch_t *zf, zstream_t * modified in a number of different ways. */ - rw_enter(&zf->zf_rwlock, RW_READER); + if (rw_tryenter(&zf->zf_rwlock, RW_READER) == 0) { + rc = 1; + goto out; + } top: for (zs = list_head(&zf->zf_stream); zs;
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