Christoph Hellwig <hch@xxxxxx> writes: > On Thu, Jul 15, 2021 at 03:17:37PM +0200, Vitaly Kuznetsov wrote: >> Christoph Hellwig <hch@xxxxxx> writes: >> >> > On Thu, Jul 15, 2021 at 11:16:30AM +0200, Vitaly Kuznetsov wrote: >> >> I'm observing a deadlock every time I try to unplug a xen-blkfront >> >> device. With 5.14-rc1+ the deadlock looks like: >> > >> > I did actually stumble over this a few days ago just from code >> > inspection. Below is what I come up with, can you give it a spin? >> >> This eliminates the deadlock, thanks! Unfortunately, this reveals the >> same issue I observed when I just dropped taking the mutex from >> blkfront_closing(): > > Yeah, this still left too much cruft in blkfront_closing. Can you > try this version instead? > This one seems to work fine for me! Feel free to throw Tested-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> in. Thanks a lot! -- Vitaly
