Author: mm
Date: Sat Jun 12 11:21:37 2010
New Revision: 209096
URL: http://svn.freebsd.org/changeset/base/209096
Log:
Fix vdev_probe() starvation brings txg train to a screeching halt
OpenSolaris onnv-revision: 9722:e3866bad4e96
Obtained from: OpenSolaris (Bug ID 6844069)
Approved by: pjd, delphij (mentor)
MFC after: 3 days
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 Jun 12
11:20:50 2010 (r209095)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c Sat Jun 12
11:21:37 2010 (r209096)
@@ -894,11 +894,11 @@ zio_taskq_dispatch(zio_t *zio, enum zio_
zio_type_t t = zio->io_type;
/*
- * If we're a config writer, the normal issue and interrupt threads
- * may all be blocked waiting for the config lock. In this case,
- * select the otherwise-unused taskq for ZIO_TYPE_NULL.
+ * If we're a config writer or a probe, the normal issue and
+ * interrupt threads may all be blocked waiting for the config lock.
+ * In this case, select the otherwise-unused taskq for ZIO_TYPE_NULL.
*/
- if (zio->io_flags & ZIO_FLAG_CONFIG_WRITER)
+ if (zio->io_flags & (ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_PROBE))
t = ZIO_TYPE_NULL;
/*
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