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Wed, 09 Jun 2021 11:39:31 +0000 From: Vlastimil Babka To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Christoph Lameter , David Rientjes , Pekka Enberg , Joonsoo Kim Cc: Sebastian Andrzej Siewior , Thomas Gleixner , Mel Gorman , Jesper Dangaard Brouer , Peter Zijlstra , Jann Horn , Vlastimil Babka Subject: [RFC v2 01/34] mm, slub: don't call flush_all() from list_locations() Date: Wed, 9 Jun 2021 13:38:30 +0200 Message-Id: <20210609113903.1421-2-vbabka@suse.cz> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210609113903.1421-1-vbabka@suse.cz> References: <20210609113903.1421-1-vbabka@suse.cz> MIME-Version: 1.0 Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b="IN8TwQl/"; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=d08Kapwu; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b="IN8TwQl/"; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=d08Kapwu; spf=pass (imf01.hostedemail.com: domain of vbabka@suse.cz designates 195.135.220.28 as permitted sender) smtp.mailfrom=vbabka@suse.cz; dmarc=none X-Stat-Signature: rzjge6hmtpt1hqreyrek7ypk8i9giihm X-Rspamd-Queue-Id: 1131B5001703 X-Rspamd-Server: rspam06 X-HE-Tag: 1623238768-474323 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: list_locations() can only be called on caches with SLAB_STORE_USER flag a= nd as with all slub debugging flags, such caches avoid cpu or percpu partial sl= abs altogether, so there's nothing to flush. Signed-off-by: Vlastimil Babka --- mm/slub.c | 2 -- 1 file changed, 2 deletions(-) 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, cha= r *buf, GFP_KERNEL)) { return sysfs_emit(buf, "Out of memory\n"); } - /* Push back cpu slabs */ - flush_all(s); =20 for_each_kmem_cache_node(s, node, n) { unsigned long flags; --=20 2.31.1