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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:15:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:15:13 +0000 |
commit | 98f739b627c5daa488e70dae1c8097aa78ca80ae (patch) | |
tree | afd38c73d3b6b7a6567383aeeaee0536dcdcb920 /mm/workingset.c | |
parent | Adding upstream version 6.9.9. (diff) | |
download | linux-98f739b627c5daa488e70dae1c8097aa78ca80ae.tar.xz linux-98f739b627c5daa488e70dae1c8097aa78ca80ae.zip |
Adding upstream version 6.9.10.upstream/6.9.10
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | mm/workingset.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/mm/workingset.c b/mm/workingset.c index f2a0ecaf70..8a044921ed 100644 --- a/mm/workingset.c +++ b/mm/workingset.c @@ -412,10 +412,12 @@ void *workingset_eviction(struct folio *folio, struct mem_cgroup *target_memcg) * @file: whether the corresponding folio is from the file lru. * @workingset: where the workingset value unpacked from shadow should * be stored. + * @flush: whether to flush cgroup rstat. * * Return: true if the shadow is for a recently evicted folio; false otherwise. */ -bool workingset_test_recent(void *shadow, bool file, bool *workingset) +bool workingset_test_recent(void *shadow, bool file, bool *workingset, + bool flush) { struct mem_cgroup *eviction_memcg; struct lruvec *eviction_lruvec; @@ -467,10 +469,16 @@ bool workingset_test_recent(void *shadow, bool file, bool *workingset) /* * Flush stats (and potentially sleep) outside the RCU read section. + * + * Note that workingset_test_recent() itself might be called in RCU read + * section (for e.g, in cachestat) - these callers need to skip flushing + * stats (via the flush argument). + * * XXX: With per-memcg flushing and thresholding, is ratelimiting * still needed here? */ - mem_cgroup_flush_stats_ratelimited(eviction_memcg); + if (flush) + mem_cgroup_flush_stats_ratelimited(eviction_memcg); eviction_lruvec = mem_cgroup_lruvec(eviction_memcg, pgdat); refault = atomic_long_read(&eviction_lruvec->nonresident_age); @@ -558,7 +566,7 @@ void workingset_refault(struct folio *folio, void *shadow) mod_lruvec_state(lruvec, WORKINGSET_REFAULT_BASE + file, nr); - if (!workingset_test_recent(shadow, file, &workingset)) + if (!workingset_test_recent(shadow, file, &workingset, true)) return; folio_set_active(folio); |