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Sat, 4 Sep 2021 10:50:09 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id qNmAEWFPM2HoUQAAMHmgww (envelope-from ); Sat, 04 Sep 2021 10:50:09 +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 01/33] mm, slub: don't call flush_all() from slab_debug_trace_open() Date: Sat, 4 Sep 2021 12:49:31 +0200 Message-Id: <20210904105003.11688-2-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; a=openpgp-sha256; l=822; h=from:subject; bh=pGY7AAbRUOvOaavAoErs6AM4Lcn1GBH3g1REQDNPySM=; b=owEBbQGS/pANAwAIAeAhynPxiakQAcsmYgBhM07+JEDh7KnXxzJDU+VcTlsdKd7YjMnZfSqC6qP3 1n0GgYOJATMEAAEIAB0WIQSNS5MBqTXjGL5IXszgIcpz8YmpEAUCYTNO/gAKCRDgIcpz8YmpEN5pCA C5y7vGRR+edojJ+ajf1PpoAHz/WLaF8X/4mzl0yr10YYirJtFBTUKHt3beNcMeqLbqUyhB82kB3pni 481iN6OX4N5eGd0DTfs5q7VyskBd6M4RhE0XRv3Xly/40AOMyWf0OWqr7utIXEoSL+XOTjw21He5dC /GBcBqktbFTBa4CZlaEQr+UZX3C7ZGHRC/8JV7n8TFSxv7F4Q03aCsHFTOiEDPW9qldFZe6ia6LJJj TRg+gxR2J8ailfVtkP5RRlAJxRfbbF5iVjp1yzSjyo5fRbdo2f1euzCDE9Y9LxMUG2I69Cdoyi4xVT 6EF+sumhuJVZdxV4GNwA+E75+Kc0I6 X-Developer-Key: i=vbabka@suse.cz; a=openpgp; fpr=A940D434992C2E8E99103D50224FA7E7CC82A664 Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=M82h5xU9; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=pgamaKZV; spf=pass (imf14.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: ittx5f8ma8qxno6y9iknc8guw88gpmgz X-Rspamd-Queue-Id: CC78D6001982 X-Rspamd-Server: rspam04 X-HE-Tag: 1630752610-333992 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: slab_debug_trace_open() can only be called on caches with SLAB_STORE_USER= flag and as with all slub debugging flags, such caches avoid cpu or percpu par= tial slabs altogether, so there's nothing to flush. Signed-off-by: Vlastimil Babka Acked-by: Christoph Lameter --- mm/slub.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index f77d8cd79ef7..f6063ec97a55 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -5825,9 +5825,6 @@ static int slab_debug_trace_open(struct inode *inod= e, struct file *filep) if (!alloc_loc_track(t, PAGE_SIZE / sizeof(struct location), GFP_KERNEL= )) return -ENOMEM; =20 - /* Push back cpu slabs */ - flush_all(s); - for_each_kmem_cache_node(s, node, n) { unsigned long flags; struct page *page; --=20 2.33.0