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From: Shakeel Butt To: Yosry Ahmed Cc: Yu Zhao , Andrew Morton , syzbot , cgroups@vger.kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@kernel.org, muchun.song@linux.dev, roman.gushchin@linux.dev, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [cgroups?] [mm?] WARNING in __mod_memcg_lruvec_state Message-ID: References: <0000000000007545d00615188a03@google.com> <20240403180752.f95e1b77e033b5e03164c160@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: B146B100003 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: 7oqg6j9ybwpe1md8osbiwug5isoha346 X-HE-Tag: 1713069845-646001 X-HE-Meta: U2FsdGVkX1/jgsPHc4fWZr/rRwCPlHC5hpZTrrMzj8VgBACLP8cN/3q76U5oQk/ZZ7gMeQ/MRS4UEHaNUHnpWh9hs0HREsbgn0J6TClvAJ2zQp9iwtAF3lYjpEuBIgFaQq4n7m+1Xx9pAjwuNQU8vBHT2QymV+JgEwmpR0kLLD9D150Sp/sWXj/tDWvNWujP+SYStLhH/UStGcHCyRHnx4WcqkPh04v0OKnb106nqCS3vNvFC9h6lB+EOCIJIt/11cRXJr+FekR9TmO2qPUaQQH0Lw1AnFX0/SgZaG/mQfO7DEuW9u4xDnx2ITMubv2cn+2SCo+80IGDPFOl1X9MBqRlERKcufgu6ewfKyvDkmLoo+bvVQbRyoJB/1R6iU0BZNsaS82qYuRvVrRWBVSZw7ERaI1B6VeawDPJbg09qvwnXFm3dS0Pbfz214BtpdP74hsRzI8UdWUE/lnFU5VhgCmBiHoQeXUg+QVb49PJEmqt+Jywt91Ssgwrybbl4HrldTJzgI+MXg8fiYkzVZiQi9ZCaSBsde6DKckEP1OFWnc4aonzPP79Pao6+vz5MKJBEtBwPY8NmPKo75NDmCq+sPs79L6fhdGmD76jHXu7GS7ysX8xwJHxfYJ1w7y86e5nZZJYGM8BE6ZdxCICjx3i8whYSty13VKR1k6Gj+Vm4BRbLO2BJwcD+cobglhTmrVVGoyDjcH9SSy5qLl9M/QdfFB0Q3nRo65JZ3NrpqJC7pOESLTFOJZ5ZcjAX97ztkvcR8NTbOtPRHXy9dvPyAPUnCKxaGQytghDwS8iuE1AJr4OkkYNDrJB7+lFvrF8Onk0pNuE9Cf9LY3UfIG6swetknsZC4Cy5bc0ojd6+t9nLaMjZfVjt2KfTzMHXSWXFQhxPSbbZ/uvgJZ964Qp6lcVPDVvJeDMLrc/Rf8ITDuznnVDcxm3Z2ZLPpBepMxo1TrL7jIWu6Te0lGTFARtUHW 0bwmIcDR Dh4+gSLj6SZZQkSkIuisjgKAh8s+CSgfsU9qsnJXkhabvTOXtvb3mgQPAPYfj6Gihjs3mRgfkZTG/jmT0S34VXgzMNrFOLOl3bk0IFNAaaqiqjq+K8hOTw/tQ7Da7DhrpjcjXCRPz+guqZIzTtvJFQ5NVq5w7Fxtsp3sfhLFC5rg4BVYcqInwWaJZDKgVOg4AYbmzEaHyyvi6ae3hqtqm2XTtGWfOsecPaPjZg1agQ9qUW/kKFx4Mj9+Lq6k6ODVs9vHsL2xdBW/btx0eSYVXTMrbCg== 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-Subscribe: List-Unsubscribe: On Thu, Apr 04, 2024 at 09:47:34PM -0700, Yosry Ahmed wrote: [...] > > > > Probably an RT build where _irqsave doesn't disable IRQ? > > Yeah, that's possible. I don't have enough familiarity with RT to know > for sure. Perhaps lruvec->lru_lock needs to be changed to a > raw_spinlock_t? I am not sure if that's the correct course of action. The kernel config does not have CONFIG_PREEMPT_RT enabled. However I have not idea how irqs are getting enabled to raise this warning.