On Mar 12, 2025 / 10:42, Damien Le Moal wrote: > On 3/12/25 10:31, Naohiro Aota wrote: > > There is a potential deadlock if we do report zones in an IO context. When one > > process do a report zones and another process freezes the block device, the > > report zones side cannot allocate a tag because the freeze is already started. > > This can thus result in new block group creation to hang forever, blocking the > > write path. > > +Shin'ichiro > > blktest has a failing test case due to a lockdep splat triggered by this. Would > be good to add that information (with the splat) here. I confirmed that this fix avoids the blktests zbd/009 failure I reported [1]. Thanks for the fix! Tested-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@xxxxxxx> [1] https://lore.kernel.org/linux-block/uyijd3ufbrfbiyyaajvhyhdyytssubekvymzgyiqjqmkh33cmi@ksqjpewsqlvw/
