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[90.235.0.241]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-52fd5c2d48fsm444127e87.275.2024.07.26.02.40.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 26 Jul 2024 02:40:48 -0700 (PDT) From: Uladzislau Rezki X-Google-Original-From: Uladzislau Rezki Date: Fri, 26 Jul 2024 11:40:46 +0200 To: Vlastimil Babka , "Paul E. McKenney" Cc: kernel test robot , oe-lkp@lists.linux.dev, lkp@intel.com, linux-mm@kvack.org, RCU Subject: Re: [vbabka:slab-kfree_rcu-destroy-v1r0] [mm, slab] df00e211c9: WARNING:at_mm/slab_common.c:#kmem_cache_kfree_rcu_destroy_workfn Message-ID: References: <202407251313.32e55498-oliver.sang@intel.com> <4b31f1be-fbc5-404b-8a4e-1eb2ad4111e3@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4b31f1be-fbc5-404b-8a4e-1eb2ad4111e3@suse.cz> X-Rspamd-Queue-Id: 33B4F1C0023 X-Stat-Signature: xn1gqeqobmmcfxssgrqcnfsjrbo1jio9 X-Rspamd-Server: rspam09 X-Rspam-User: X-HE-Tag: 1721986850-36390 X-HE-Meta: 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 QXF+nIU/ zK/a4V6YVzKvTpePOgF2IBZHGymVJf40X3SdKSxkAzPxGhwddKNX0CQZaVfBFKbN1B4Zr9Fi6vCcZyzXT+K/h75l+lludWYVgd1RsvNgc85p8h78NkE6mST85FD3d/lbPTUz8QMQEDfeyCdWY6N6EqKcr9iGS1UhiwKKkYeqZyAxfX+XEb8vF1vfOMLllRiloFTkt9y781EZsWs45ivilEtvxoXVu8PQdSaVotoxgTPnvsMbJu8iV9uc9c88BS0YGZ+z01bMIUawjJhUYuTxS54nPrlWLDGCAW/Lb3/PMtk/QLRgWD/wxNdnxJPftvHqV4RYr/pQXb6TnH1dByuWQeq6lvjKfWxxQSu2wL441mwf+Iz6AXrq6ypqKssQc55ELT0jz/K3Q9swyTaR10t1CR1gzVBQzJtamUJ6Mpk2NIOysl1Hur5QRb1b+Qwy25pN1vA4ZNaAIIC1XO6AhHIdAHnnhs7ay9dQmh4hW X-Bogosity: Ham, tests=bogofilter, spamicity=0.000037, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Jul 26, 2024 at 11:34:57AM +0200, Vlastimil Babka wrote: > On 7/25/24 7:59 AM, kernel test robot wrote: > > > > hi, Vlastimil Babka, > > > > we noticed by this commit: > > > > 7fd4dfd0d38db6f3 df00e211c9c11e8d20f2ea7b4ab > > ---------------- --------------------------- > > fail:runs %reproduction fail:runs > > | | | > > 6:6 -100% :6 dmesg.WARNING:at_mm/slab_common.c:#kmem_cache_destroy > > :6 100% 6:6 dmesg.WARNING:at_mm/slab_common.c:#kmem_cache_kfree_rcu_destroy_workfn > > > > below formal report just FYI what we observed in our tests. not sure if it's > > valuable to supply any hints. > > > > > > Hello, > > > > kernel test robot noticed "WARNING:at_mm/slab_common.c:#kmem_cache_kfree_rcu_destroy_workfn" on: > > > > commit: df00e211c9c11e8d20f2ea7b4ab1d7c9760fe822 ("mm, slab: asynchronously destroy caches with outstanding objects") > > https://git.kernel.org/cgit/linux/kernel/git/vbabka/linux.git slab-kfree_rcu-destroy-v1r0 > > Yes, that's expected proves we need the proper barrier added from the RCU > folks :) > Give me some time, i will implement it! After discussion with Paul it should not be so hard :) Thanks! -- Uladzislau Rezki