diff options
| author | Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> | 2021-10-01 21:38:40 +0300 |
|---|---|---|
| committer | Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> | 2021-10-01 21:40:21 +0300 |
| commit | 9c881021a269af242594e2dfc79f1c4701404887 (patch) | |
| tree | c8ec14f412d7ea35009b2dee08770082ddbb5c6e /drivers/md/dm-crypt.c | |
| parent | e9479d98b87227b8b7502c4c1e778887b23799f1 (diff) | |
| parent | cf06e1ab1c3ed354da5873e646f2164fea147c88 (diff) | |
| download | linux-dev-5.10-intel.tar.xz | |
Merge branch 'dev-5.10' into dev-5.10-inteldev-5.10-intel
Pull 5.10.67 stable from OpenBMC upstream.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Diffstat (limited to 'drivers/md/dm-crypt.c')
| -rw-r--r-- | drivers/md/dm-crypt.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 70ae6f3aede9..2aa4acd33af3 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -2643,7 +2643,12 @@ static void *crypt_page_alloc(gfp_t gfp_mask, void *pool_data) struct crypt_config *cc = pool_data; struct page *page; - if (unlikely(percpu_counter_compare(&cc->n_allocated_pages, dm_crypt_pages_per_client) >= 0) && + /* + * Note, percpu_counter_read_positive() may over (and under) estimate + * the current usage by at most (batch - 1) * num_online_cpus() pages, + * but avoids potential spinlock contention of an exact result. + */ + if (unlikely(percpu_counter_read_positive(&cc->n_allocated_pages) >= dm_crypt_pages_per_client) && likely(gfp_mask & __GFP_NORETRY)) return NULL; |