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h=Date:From:To:Cc:Subject:References:In-Reply-To; b=cJnfCa+/PPqcAgkpvqezLMR2js34rRk5O0su+0QMFVJyNCuOqk6uWWS8vcRhlA4CB mQgXzdDCRjKIpqHA5EcBHCiLXNHe8GgvfJVcxMMwx+EC4KpkRH2kjpeog+A77ZaWqz EhrpBpUwo5teWQe8D+rF0DJEKe1uFw3G0kAKGR4KPdZOCbjh43F/W0dp5yeps7IedX JwYjlXPm3gDeQV227wPy87XybOVTt2/hdzmjQ0UbDDqaxRo4dv/5P6O9fw/rMl2dqC cFpkhbBzWMAE5BLbJ3ZimbjY2p45QVM9zCw2juQdunu9khq793nphxcuofJ3VNQBKC bNojwVvfyvZGA== Date: Fri, 29 May 2026 08:56:45 +0100 From: Lorenzo Stoakes To: Andrew Morton Cc: xu.xin16@zte.com.cn, david@kernel.org, chengming.zhou@linux.dev, hughd@google.com, wang.yaxin@zte.com.cn, linux-mm@kvack.org, linux-kernel@vger.kernel.org, corbet@lwn.net Subject: Re: [PATCH v6 0/6] KSM: performance optimizations for rmap_walk_ksm Message-ID: References: <20260522105234715fKI7KSsjC5XpEVMwoV6rI@zte.com.cn> <20260522202824.fccba46554fb6223e63d685c@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260522202824.fccba46554fb6223e63d685c@linux-foundation.org> X-Rspam-User: X-Rspamd-Queue-Id: CBEFD140003 X-Rspamd-Server: rspam03 X-Stat-Signature: tukmwam39ea9diazsu1ui3aurjzy6em4 X-HE-Tag: 1780041412-590612 X-HE-Meta: U2FsdGVkX198zCq0kwtJkhNw6/qqpftfShuZVHYl93vr3qkLoVOjdLNPuthKGUM1N26pXRu09WZzMXFw0zkrsxWGT7xnVWpGHozHg9qqkYgSRhWgfETeclwfkbXRuUKLobNIXkuR11cR4Q4EYN1yiHDCwvAmVqlzHAPxqcgZ74qbtgNbeGvwwT3lrt0c4Z4yCLeo1J86W8u+07VlBOlsVmI2HpPGhE7u1FtpL8LwyQwSnASymNX0dzoYnYupVtLM7dpXhkfijviNKs0qlV7VlTXT/11DILxZj0uBYyaXtNXAIn49wJ4kRmWaLpMLdZszEQ+CsxuNrrWLSA/igvRNCNbZT5arCTpPCplCnYTT60cwG0N5wDbXXZYEHbgnXjHc9CRd5x9ZjG5+Z/4pdusKCKX3h0Y66UHELtrlw+J0uh1bia21J/0Ojt6lllOz+mE6VPj02Gs/lEr89cyQr9bc6YchbqUWvfieflNfd6AGLPrL7ulw2kGdtfPOT2GFLKQE+tZt3FEvD2k/McJFFzM+BHdGtZHHodxKRkLR/NTBaW0z2czvrWBNlViMNaCzGwDy09cmjFRvKOTtm/2yNypc8EtGw4+NMzJF6RLOq7mcFnoFty/ojHI67sNoFOJXvotd6Vn/fFdigjdYSjt5NE88PIklOSL+Xv17Gmc6j9Es13nSIpxfjavj7mdF6UU0LD6FmxgMWQWsWyc5gFpq4jQlt+sP40KG939JafJ4Oj9SBu3NlZIhPPRRQDmGupZtwh+MrLm7Wnjyipr+HIsiN+DeyrB+fvtMpJwlAAPnVc4sWnLFqvmw01KrroOjstn1TeGDW4CgeVPBbm0mf8HR9N26V2F6gP1ina5aG3L/ewCBVW8vY8UDSsqu3f0wTxXv6GKK0ii9XYnUihFO+PDHCbzrtmfy2AM9LY0HIFNqlq8aBAC8oUEvGT3cPUKhGRTTnSGvz18kPzVY4UNsoavCO4r 9om5VbeM C3lA4lVOGzcyWS+otQuTEVuEuhtKhIfJyb66SAFRPw+DYvOq7YLNuis2GhDCYGa5dQqfotDPd5Euv8jBRd8JPUUtMyOvNoh9fwLGteGljqH8fNesYhPf/CgSsEsUQSx7pV019rPf9RPY+xloXJEgFgEgLYBIFLwXXWaViC02uyOap5l7dimh4729TjB4QoSiM9H2tD4S09rgosnlhXKFrvOatIoDYpwf+u6z1xD2lFMao0lTXKmCOdIqktkrUaSTo6P4gC3B8V2XwNdjk0w0EBZBWL6N62iWXk8IIXA8281NpPNMRCX0yNO11BASk+nAycVrsDAUSQQKUgyN8VilOCTb0ud5bRRFwwUpc1ysIBI5RwpoNEv9IQsWJ9xDLmir+AaYQIPMHwkpOj3+uJWV3ARjnOiE9HoJtpvRA Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, May 22, 2026 at 08:28:24PM -0700, Andrew Morton wrote: > On Fri, 22 May 2026 10:52:34 +0800 (CST) wrote: > > > This series fixes a severe KSM reverse-mapping performance problem > > that can freeze applications for hundreds of milliseconds under > > memory pressure especially when a lot of unrelated VMAs sharing a > > single anon_vma. > > Thanks. I agree that this behaviour is quite obnoxious and getting it > addressed is quite desirable. > > So I'd normally merge this in its present unreviewed state in order to > push things along a bit, but the AI review gives me pause: > > https://sashiko.dev/#/patchset/20260522105234715fKI7KSsjC5XpEVMwoV6rI@zte.com.cn > > Can you please take a look, decide what (if any) changes are needed? I also plan to look through this! Cheers, Lorenzo