Alexander Larsson 2ffef1b7eb devmapper: Avoid AB-BA deadlock ... We currently drop the global lock while holding a per-device lock when waiting for device removal, and then we re-aquire it when the sleep is done. This is causing a AB-BA deadlock if anyone at the same time tries to do any operation on that device like this: thread A: thread B grabs global lock grabs device lock releases global lock sleeps grabs global lock blocks on device lock wakes up blocks on global lock To trigger this you can for instance do: ID=`docker run -d fedora sleep 5` cd /var/lib/docker/devicemapper/mnt/$ID docker wait $ID docker rm $ID & docker rm $ID The unmount will fail due to the mount being busy thus causing the timeout and the second rm will then trigger the deadlock. We fix this by adding a lock ordering such that the device locks are always grabbed before the global lock. This is safe since the device lookups now have a separate lock. Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)		2014-04-02 09:05:00 +02:00
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aufs	This patch adds SELinux labeling support.	2014-03-26 15:30:40 -04:00
btrfs	This patch adds SELinux labeling support.	2014-03-26 15:30:40 -04:00
devmapper	devmapper: Avoid AB-BA deadlock	2014-04-02 09:05:00 +02:00
vfs	This patch adds SELinux labeling support.	2014-03-26 15:30:40 -04:00
driver.go	Merge pull request #4838 from crosbymichael/btrfs-ftw	2014-03-27 19:55:25 +02:00