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Tue, 17 Aug 2021 15:42:35 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id Vvn9FevYG2HCTgAAMHmgww (envelope-from ); Tue, 17 Aug 2021 15:42:35 +0000 Subject: Re: [PATCH v4 35/35] mm, slub: convert kmem_cpu_slab protection to local_lock To: Sebastian Andrzej Siewior Cc: Andrew Morton , Christoph Lameter , David Rientjes , Pekka Enberg , Joonsoo Kim , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mike Galbraith , Thomas Gleixner , Mel Gorman , Jesper Dangaard Brouer , Jann Horn References: <20210805152000.12817-1-vbabka@suse.cz> <20210805152000.12817-36-vbabka@suse.cz> <20210817153937.hxnuh7mqp6vuiyws@linutronix.de> From: Vlastimil Babka Message-ID: <0120f82e-9251-9597-442f-8c582134a0d1@suse.cz> Date: Tue, 17 Aug 2021 17:41:57 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <20210817153937.hxnuh7mqp6vuiyws@linutronix.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: AD8F730000BD Authentication-Results: imf08.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=k8mG3aJA; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=HbQQcq7u; spf=pass (imf08.hostedemail.com: domain of vbabka@suse.cz designates 195.135.220.28 as permitted sender) smtp.mailfrom=vbabka@suse.cz; dmarc=none X-Rspamd-Server: rspam01 X-Stat-Signature: dmfp1zf19i6h7o67d6mjunwxgyrh1wdg X-HE-Tag: 1629214957-449488 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: On 8/17/21 5:39 PM, Sebastian Andrzej Siewior wrote: > On 2021-08-05 17:20:00 [+0200], Vlastimil Babka wrote: >> @@ -2849,7 +2891,11 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node, >> >> load_freelist: >> >> - lockdep_assert_irqs_disabled(); >> +#ifdef CONFIG_PREEMPT_RT >> + lockdep_assert_held(this_cpu_ptr(&s->cpu_slab->lock.lock)); >> +#else >> + lockdep_assert_held(this_cpu_ptr(&s->cpu_slab->lock)); >> +#endif > > Could you please make this hunk only > > lockdep_assert_held(this_cpu_ptr(&s->cpu_slab->lock)); > > i.e. the non-RT version? Does it mean that version works fine on RT now? >> /* >> * freelist is pointing to the list of objects to be used. > > > Sebastian >