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Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1uMt3z-00000003OmV-2tly; Wed, 04 Jun 2025 18:42:11 +0000 Date: Wed, 4 Jun 2025 19:42:11 +0100 From: Matthew Wilcox To: Dave Chinner Cc: Michal Hocko , Andrew Morton , Shakeel Butt , Yafang Shao , Harry Yoo , Kees Cook , joel.granados@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Josef Bacik , linux-mm@kvack.org, Vlastimil Babka Subject: Re: [PATCH] mm: kvmalloc: make kmalloc fast path real fast path Message-ID: References: <3315D21B-0772-4312-BCFB-402F408B0EF6@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 420B516000D X-Stat-Signature: 4k3fza6ind3e58pcceuhhap9c83sgg56 X-Rspam-User: X-Rspamd-Server: rspam04 X-HE-Tag: 1749062542-374104 X-HE-Meta: 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 PQdR6Aoa r5siAgUFAmeju9hWRtNuz1jFk/0+2c/fDOD8Hz0V6AnBHofiByOiPFtyJlHmJgLWIK0oA/oLwp/YgBFd7SEdhlMZUeYbCk5zgRCGnaq/pZZ5hnhfbyvnWsSVZSg2f6ew0YnkZ9l+NSTkzJMiE+7ZL36a67Gy6SEUy1S7gvuGEr61+DnrsCWZtgqnWJrZtXq0Nd5SgrccA/6/36+5RcsGFnDFLXfPZeSWHpFnR+Ski6IZG6anvIBEwNdrBTosuurFuTAW3w8aB78ijnwvWiNCRvGXi/tDoVsnSQBi0fy3v+R/q30g= 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 Wed, Apr 09, 2025 at 11:10:02AM +1000, Dave Chinner wrote: > On Thu, Apr 03, 2025 at 09:51:44PM +0200, Michal Hocko wrote: > > Add Andrew > > > > Also, Dave do you want me to redirect xlog_cil_kvmalloc to kvmalloc or > > do you preffer to do that yourself? > > I'll do it when the kvmalloc patches evntually land and I can do > back to back testing to determine if the new kvmalloc code behaves > as expected... > > Please cc me on the new patches you send that modify the kvmalloc > behaviour. FWIW, this has now landed in Linus' tree as 46459154f997: if (!(flags & __GFP_RETRY_MAYFAIL)) - flags |= __GFP_NORETRY; + flags &= ~__GFP_DIRECT_RECLAIM;