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Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1uqWUZ-0000000DqjD-1and; Mon, 25 Aug 2025 12:40:07 +0000 Date: Mon, 25 Aug 2025 13:40:07 +0100 From: Matthew Wilcox To: yangshiguang1011@163.com Cc: harry.yoo@oracle.com, vbabka@suse.cz, akpm@linux-foundation.org, cl@gentwo.org, rientjes@google.com, roman.gushchin@linux.dev, glittao@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, yangshiguang , stable@vger.kernel.org Subject: Re: [PATCH v3] mm: slub: avoid wake up kswapd in set_track_prepare Message-ID: References: <20250825121737.2535732-1-yangshiguang1011@163.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250825121737.2535732-1-yangshiguang1011@163.com> X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 4D67D14000C X-Stat-Signature: uz49ow3q3rzjmmx5rssskyfemo1xsqh8 X-Rspam-User: X-HE-Tag: 1756125618-421308 X-HE-Meta: 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 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 Mon, Aug 25, 2025 at 08:17:37PM +0800, yangshiguang1011@163.com wrote: > Avoid deadlock caused by implicitly waking up kswapd by > passing in allocation flags. [...] > + /* Preemption is disabled in ___slab_alloc() */ > + gfp_flags &= ~(__GFP_DIRECT_RECLAIM); If you don't mean __GFP_KSWAPD_RECLAIM here, the explanation needs to be better.