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bh=Iykri81EvFzwHykbB/4XmCR+cinYqJzxF99XZovGSx4=; b=nU0vbvi6m57B8uPxUPw3tpGJKvoGgraMsCyoNfCvRibrvvPl1l8BBcn3i/Ryud3raORL7o lvoypSvHXCDncgCA== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 0C48513AC0; Sat, 4 Sep 2021 10:50:10 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id SEo5AmJPM2HoUQAAMHmgww (envelope-from ); Sat, 04 Sep 2021 10:50:10 +0000 From: Vlastimil Babka To: linux-mm@kvack.org, Christoph Lameter , David Rientjes , Pekka Enberg , Joonsoo Kim Cc: Andrew Morton , linux-kernel@vger.kernel.org, Mike Galbraith , Sebastian Andrzej Siewior , Thomas Gleixner , Mel Gorman , Vlastimil Babka Subject: [PATCH v6 05/33] mm, slub: remove redundant unfreeze_partials() from put_cpu_partial() Date: Sat, 4 Sep 2021 12:49:35 +0200 Message-Id: <20210904105003.11688-6-vbabka@suse.cz> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210904105003.11688-1-vbabka@suse.cz> References: <20210904105003.11688-1-vbabka@suse.cz> MIME-Version: 1.0 X-Developer-Signature: v=1; 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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. Signed-off-by: Vlastimil Babka --- mm/slub.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index fee093db2bfd..79e53303844c 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -2466,13 +2466,6 @@ static void put_cpu_partial(struct kmem_cache *s, struct page *page, int drain) } 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 */ }