Thanks, i'll take a look at that. For reference, the deadlock we are seeing looks similar to the one described at the bottom of this issue: https://tracker.ceph.com/issues/52088 thanks sam On Wed, Dec 21, 2022 at 4:04 PM Josef Johansson <josef86@xxxxxxxxx> wrote: > Hi, > > I made some progress with my testing on a similat issue. Maybe the test > will be easy to adapt tonyour case. > > https://tracker.ceph.com/issues/57396 > > What I can say though is that I don't see the deadlock problem in my > testing. > > Cheers > -Josef > > On Wed, 21 Dec 2022 at 22:00, Sam Perman <sam@xxxxxxxx> wrote: > >> Hello! >> >> I'm trying to chase down a deadlock we occasionally see on the client side >> when using rbd-nbd and have a question about a lingering process we are >> seeing. >> >> I have a simple test script that will execute the following in order: >> >> * use rbd to create a new image >> * use rbd-nbd to map the image locally >> * mkfs a file system >> * mount the image locally >> * use dd to write some dummy data >> * unmount the device >> * use rbd-nbd to unmap the image >> * use rbd to remove the image >> >> After this is all done, there is a lingering process that I'm curious >> about. >> >> The process is called "[kworker/u9:0-knbd0-recv]" (in state "I") and is a >> child of "[kthreadd]" (in state "S"). >> >> Is this normal? I don't see any specific problems with it but I'm >> eventually going to ramp up this test to use a lot of concurrency to see >> if >> I can reproduce the deadlock we are seeing, and want to make sure I'm >> starting clean.) >> >> Thanks for any insight you have! >> sam >> _______________________________________________ >> ceph-users mailing list -- ceph-users@xxxxxxx >> To unsubscribe send an email to ceph-users-leave@xxxxxxx >> > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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