[v2] nvme: Convert tag_list mutex to rwsemaphore to avoid deadlock

[PATCH v2 0/1] nvme: Convert tag_list mutex to rwsemaphore to avoid deadlock

Mohamed Khalfella posted 1 patch 2 weeks ago

Diff against v1
Download series mbox

block/blk-mq-sysfs.c   | 10 ++---
block/blk-mq.c         | 95 +++++++++++++++++++++++-------------------
include/linux/blk-mq.h |  4 +-
3 files changed, 58 insertions(+), 51 deletions(-)

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[PATCH v2 0/1] nvme: Convert tag_list mutex to rwsemaphore to avoid deadlock

Posted by Mohamed Khalfella 2 weeks ago

Changes from v1:

- Keep existing behavior do not freeze newly added "q" when
  transitioning tagset from unshared to shared.
- Delete blk_mq_update_tag_set_shared() and explicitly freeze "firstq"
  and "q" and set their shared status.
- Add comment explaining why we are downgrading the semaphore before
  freezing "firstq".

v1: https://lore.kernel.org/all/20251113202320.2530531-1-mkhalfella@purestorage.com/

Mohamed Khalfella (1):
  nvme: Convert tag_list mutex to rwsemaphore to avoid deadlock

 block/blk-mq-sysfs.c   | 10 ++---
 block/blk-mq.c         | 95 +++++++++++++++++++++++-------------------
 include/linux/blk-mq.h |  4 +-
 3 files changed, 58 insertions(+), 51 deletions(-)

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2.51.0