Re: [PATCH] mbcache: Avoid nesting of cache->c_list_lock under bit locks

[Theodore Ts'o]

On Thu, 8 Sep 2022 11:10:32 +0200, Jan Kara wrote:
> Commit 307af6c87937 ("mbcache: automatically delete entries from cache
> on freeing") started nesting cache->c_list_lock under the bit locks
> protecting hash buckets of the mbcache hash table in
> mb_cache_entry_create(). This causes problems for real-time kernels
> because there spinlocks are sleeping locks while bitlocks stay atomic.
> Luckily the nesting is easy to avoid by holding entry reference until
> the entry is added to the LRU list. This makes sure we cannot race with
> entry deletion.
> 
> [...]

Applied, thanks!

[1/1] mbcache: Avoid nesting of cache->c_list_lock under bit locks
      commit: 9cbf99ae41e3a051cc9ec738f2c436ec1725e0e8

Best regards,
-- 
Theodore Ts'o <tytso@xxxxxxx>