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[RFC,v2,01/34] mm, slub: don't call flush_all() from list_locations()

Message ID 20210609113903.1421-2-vbabka@suse.cz (mailing list archive)
State New
Headers show
Series SLUB: reduce irq disabled scope and make it RT compatible | expand

Commit Message

Vlastimil Babka June 9, 2021, 11:38 a.m. UTC
list_locations() can only be called on caches with SLAB_STORE_USER flag and as
with all slub debugging flags, such caches avoid cpu or percpu partial slabs
altogether, so there's nothing to flush.

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---
 mm/slub.c | 2 --
 1 file changed, 2 deletions(-)
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Patch

diff --git a/mm/slub.c b/mm/slub.c
index 3f96e099817a..f928607230b2 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4839,8 +4839,6 @@  static int list_locations(struct kmem_cache *s, char *buf,
 			     GFP_KERNEL)) {
 		return sysfs_emit(buf, "Out of memory\n");
 	}
-	/* Push back cpu slabs */
-	flush_all(s);
 
 	for_each_kmem_cache_node(s, node, n) {
 		unsigned long flags;