[merged] mm-slub-remove-redundant-unfreeze_partials-from-put_cpu_partial.patch removed from -mm tree

[merged] mm-slub-remove-redundant-unfreeze_partials-from-put_cpu_partial.patch removed from -mm tree

[akpm]

The patch titled
     Subject: mm, slub: remove redundant unfreeze_partials() from put_cpu_partial()
has been removed from the -mm tree.  Its filename was
     mm-slub-remove-redundant-unfreeze_partials-from-put_cpu_partial.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
From: Vlastimil Babka <vbabka@suse.cz>
Subject: mm, slub: remove redundant unfreeze_partials() from put_cpu_partial()

Commit d6e0b7fa1186 ("slub: make dead caches discard free slabs
immediately") introduced cpu partial flushing for kmemcg caches, based on
setting the target cpu_partial to 0 and adding a flushing check in
put_cpu_partial().  This code that sets cpu_partial to 0 was later moved
by c9fc586403e7 ("slab: introduce __kmemcg_cache_deactivate()") and
ultimately removed by 9855609bde03 ("mm: memcg/slab: use a single set of
kmem_caches for all accounted allocations").  However the check and flush
in put_cpu_partial() was never removed, although it's effectively a dead
code.  So this patch removes it.

Note that d6e0b7fa1186 also added preempt_disable()/enable() to
unfreeze_partials() which could be thus also considered unnecessary.  But
further patches will rely on it, so keep it.

Link: https://lkml.kernel.org/r/20210904105003.11688-6-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Jann Horn <jannh@google.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Qian Cai <quic_qiancai@quicinc.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/slub.c |    7 -------
 1 file changed, 7 deletions(-)

--- a/mm/slub.c~mm-slub-remove-redundant-unfreeze_partials-from-put_cpu_partial
+++ a/mm/slub.c
@@ -2466,13 +2466,6 @@ static void put_cpu_partial(struct kmem_
 
 	} while (this_cpu_cmpxchg(s->cpu_slab->partial, oldpage, page)
 								!= oldpage);
-	if (unlikely(!slub_cpu_partial(s))) {
-		unsigned long flags;
-
-		local_irq_save(flags);
-		unfreeze_partials(s, this_cpu_ptr(s->cpu_slab));
-		local_irq_restore(flags);
-	}
 	preempt_enable();
 #endif	/* CONFIG_SLUB_CPU_PARTIAL */
 }
_

Patches currently in -mm which might be from vbabka@suse.cz are