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Chunwei Chen bc25c9325b Use a dedicated taskq for vdev_file

Originally, vdev_file used system_taskq. This would cause a deadlock,
especially on system with few CPUs. The reason is that the prefetcher
threads, which are on system_taskq, will sometimes be blocked waiting
for I/O to finish. If the prefetcher threads consume all the tasks in
system_taskq, the I/O cannot be served and thus results in a deadlock.

We fix this by creating a dedicated vdev_file_taskq for vdev_file I/O.

Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2270

2014-05-14 16:20:21 -07:00

linux

Implement File Attribute Support

2014-05-01 10:11:18 -07:00

sys

Use a dedicated taskq for vdev_file

2014-05-14 16:20:21 -07:00

libnvpair.h

Support custom build directories and move includes

2010-09-08 12:38:56 -07:00

libuutil_common.h

Support custom build directories and move includes