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| author |   Arjan van de Ven <arjan@linux.intel.com> | 2013-05-01 16:38:23 -0400 |
|---|---|---|
| committer |   Matthew Wilcox <matthew.r.wilcox@intel.com> | 2013-05-01 16:40:27 -0400 |
| commit | 564a232c059913d91b491e04c2b2d670b8f94615 (patch) | |
| tree | f0f83ea760a81c9c2d05d23f39af419fcf462f5b /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | NVMe: Add a character device for each nvme device (diff) | |
| download | linux-dev-564a232c059913d91b491e04c2b2d670b8f94615.tar.xz linux-dev-564a232c059913d91b491e04c2b2d670b8f94615.zip | |
NVMe: Set TASK_INTERRUPTIBLE before processing queues
The kthread has two tasks; handling timeouts (for which it runs once per
second), and submitting queued BIOs. If a BIO happens to be queued after
the thread has processed the queue but before it calls schedule_timeout(),
the thread will sleep for a second before submitting it, which can cause
performance problems in some rare cases (that will become more common in
a subsequent patch).
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Tested-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
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