]> git.baikalelectronics.ru Git - kernel.git/commit
dm thin: add timeout to stop out-of-data-space mode holding IO forever
authorJoe Thornber <ejt@redhat.com>
Fri, 9 May 2014 14:59:38 +0000 (15:59 +0100)
committerMike Snitzer <snitzer@redhat.com>
Wed, 14 May 2014 20:11:37 +0000 (16:11 -0400)
commit7b679a520fb776173f15586ea2827f82c04c32e6
treee7599aa49a532c6ae05ac99a31bf901341ce2b45
parentd3ff47b9652679ed8a82cb47584744667c47c738
dm thin: add timeout to stop out-of-data-space mode holding IO forever

If the pool runs out of data space, dm-thin can be configured to
either error IOs that would trigger provisioning, or hold those IOs
until the pool is resized.  Unfortunately, holding IOs until the pool is
resized can result in a cascade of tasks hitting the hung_task_timeout,
which may render the system unavailable.

Add a fixed timeout so IOs can only be held for a maximum of 60 seconds.
If LVM is going to resize a thin-pool that is out of data space it needs
to be prompt about it.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org # 3.14+
drivers/md/dm-thin.c