On 12/6/24 10:52, Damien Le Moal wrote: > Jens, > > These patches address potential issues with zone write plugging. > The first 2 patches fix handling of REQ_NOWAIT BIOs as these can be > "failed" after going through the zone write plugging and changing the > target zone plug zone write pointer offset. > > Patch 3 is a bigger fix and address a potential deadlock issue due to > the zone write plugging internally issuing zone report operations to > recover from write errors. This zone report operation is removed by this > patch and replaced with an automatic recovery when the BIO issuer > execute a zone report. This change in behavior results in a problem with > REQ_OP_WRITE_ZEROES handling and failures in the dm-zoned device mapper. > That is fixed in patch 4. I forgot to mention that I will followup these fixes with a cleanup of the report zones API and its callback function interface to clean it up as patch 4 introduces an indirect user callback call that is not very pretty. > > Damien Le Moal (4): > block: Use a zone write plug BIO work for REQ_NOWAIT BIOs > block: Ignore REQ_NOWAIT for zone reset and zone finish operations > block: Prevent potential deadlocks in zone write plug error recovery > dm: Fix dm-zoned-reclaim zone write pointer alignment > > block/blk-zoned.c | 507 +++++++++++++++------------------- > drivers/md/dm-zoned-reclaim.c | 4 +- > include/linux/blkdev.h | 5 +- > 3 files changed, 229 insertions(+), 287 deletions(-) > -- Damien Le Moal Western Digital Research
