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Wed, 3 Sep 2025 13:00:09 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id gMTvDNk7uGitOAAAD6G6ig (envelope-from ); Wed, 03 Sep 2025 13:00:09 +0000 From: Vlastimil Babka Date: Wed, 03 Sep 2025 14:59:44 +0200 Subject: [PATCH v7 02/21] slab: simplify init_kmem_cache_nodes() error handling Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250903-slub-percpu-caches-v7-2-71c114cdefef@suse.cz> References: <20250903-slub-percpu-caches-v7-0-71c114cdefef@suse.cz> In-Reply-To: <20250903-slub-percpu-caches-v7-0-71c114cdefef@suse.cz> To: Suren Baghdasaryan , "Liam R. Howlett" , Christoph Lameter , David Rientjes Cc: Roman Gushchin , Harry Yoo , Uladzislau Rezki , Sidhartha Kumar , linux-mm@kvack.org, linux-kernel@vger.kernel.org, rcu@vger.kernel.org, maple-tree@lists.infradead.org, vbabka@suse.cz X-Mailer: b4 0.14.2 X-Spamd-Result: default: False [-4.30 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-0.999]; MIME_GOOD(-0.10)[text/plain]; ARC_NA(0.00)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; MIME_TRACE(0.00)[0:+]; RCPT_COUNT_TWELVE(0.00)[13]; RCVD_TLS_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; FROM_HAS_DN(0.00)[]; FREEMAIL_CC(0.00)[linux.dev,oracle.com,gmail.com,kvack.org,vger.kernel.org,lists.infradead.org,suse.cz]; TO_DN_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.cz:mid,suse.cz:email] X-Spam-Flag: NO X-Spam-Level: X-Spam-Score: -4.30 We don't need to call free_kmem_cache_nodes() immediately when failing to allocate a kmem_cache_node, because when we return 0, do_kmem_cache_create() calls __kmem_cache_release() which also performs free_kmem_cache_nodes(). Signed-off-by: Vlastimil Babka Reviewed-by: Harry Yoo --- mm/slub.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index 30003763d224c2704a4b93082b8b47af12dcffc5..9f671ec76131c4b0b28d5d568aa= 45842b5efb6d4 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -5669,10 +5669,8 @@ static int init_kmem_cache_nodes(struct kmem_cache *= s) n =3D kmem_cache_alloc_node(kmem_cache_node, GFP_KERNEL, node); =20 - if (!n) { - free_kmem_cache_nodes(s); + if (!n) return 0; - } =20 init_kmem_cache_node(n); s->node[node] =3D n; --=20 2.51.0