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Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1qYBjL-00CIfE-TN; Mon, 21 Aug 2023 20:42:31 +0000 Date: Mon, 21 Aug 2023 21:42:31 +0100 From: Matthew Wilcox To: Mateusz Guzik Cc: linux-kernel@vger.kernel.org, dennis@kernel.org, tj@kernel.org, cl@linux.com, akpm@linux-foundation.org, shakeelb@google.com, linux-mm@kvack.org Subject: Re: [PATCH 0/2] execve scalability issues, part 1 Message-ID: References: <20230821202829.2163744-1-mjguzik@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230821202829.2163744-1-mjguzik@gmail.com> X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 7830080026 X-Stat-Signature: 67mwjwfcht758tc6dp41rbzrpzmcbmbq X-Rspam-User: X-HE-Tag: 1692650560-79545 X-HE-Meta: U2FsdGVkX1/rWLnvAIYlzxKiajSHij7UBirsOPcjn3i/5CtOnPJ/CbSxv+I1F0rGJgeY5fWs5Ro4HM3UbzXBy6mXhZZb/6lnIvIgLhwOMUl1gEwYOwJR4OTV1BPdktYpQxCPo6EJUs5OMSshCNmzjbpfFg1OqHa3a4jvHwT8zLLy9DsJa6lmDpvJ4lEEU+djS0iZHmT8Wgwhblbb/L+74SA+m30h+2L5xdyLr9yukebL0DfTXRceW18QhmKV6T7by3b0ZsVplTcZr0flOPi35la+ADytZ8VFF51ac39UChNI90i06U9YNAxs+mC1bVR7LGRJo2MoYK1cOTZE+os8DO9muazWNQVstq0yujt+yS9xl9JqLlITMjQyd7q7Mp8gnSFJZMi0LWX7Jf3bnSZq3Yau5jqqc9PneeVwFWEzqs31INRaN2d9TsIEwZHfoSuXX4lIa/G3QEpDO7yxj37mIw1UmX+//ZIIA8Pb64EW0Lw92fDevVxTxsIAs7bNxdFY9IGfloLw5WmxxsC2+z17ggJ3qihklAA/pamyolvE9GMH0IDOSLvirXjS1isaxKl8dFyKgJqcifqC5cl5rjGoi5b+odoLZULeCqzap44yGmKzjHKG9dTHSE5UvdpTxm08VD+b/eeF5mYUKW12ZO9YfxuARUKcaxfZz8Us8kHYjyXNYqI5CuQclvNJ1QykFWEfubhxfP3w2mMOrt+MiuERRjzou38hl4wu2l1kgyOU9gYajQBZA81lG9j3oRwJQetETvMgTLBZaXcf0DgFGt1ArXJUFW5zpAfDf8KKbCwZdeYHiXX1bzeCwNs4rIt+UMAb/OT1BUSqpE1GWUnqGgLeq8hR1HW8BP42bJ/psfY7YdPcW56Elkuy4UaZihSZuinLEJHRHQYbJyf1E6CxxM0OC1nCIu8ybY9bRVIBaDkrLkUIvBwpiDqxfJbImZeBJD/pcKPkiY9fqytYiE+CiIy CLBxKkZ6 xAspLaRJ7NAVWcseVq0yQdhEvs3jnieI8tr3b6rdviUVnI4Xd+o3jfDPd/J109a46f4pqzyqMF5SwQCwvT6hxo1La3OeVnxFzuq0KPRlpI9udhs4SQ4yscXmWP9NdrAsfcI0Zg/6tQGrTvYU= 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: On Mon, Aug 21, 2023 at 10:28:27PM +0200, Mateusz Guzik wrote: > > While with the patch these allocations remain a significant problem, > > the primary bottleneck shifts to: > > > > __pv_queued_spin_lock_slowpath+1 > > _raw_spin_lock_irqsave+57 > > folio_lruvec_lock_irqsave+91 > > release_pages+590 > > tlb_batch_pages_flush+61 > > tlb_finish_mmu+101 > > exit_mmap+327 > > __mmput+61 > > begin_new_exec+1245 > > load_elf_binary+712 > > bprm_execve+644 > > do_execveat_common.isra.0+429 > > __x64_sys_execve+50 > > do_syscall_64+46 > > entry_SYSCALL_64_after_hwframe+110 > > I intend to do more work on the area to mostly sort it out, but I would > not mind if someone else took the hammer to folio. :) Funny you should ask ... these patches are from ~3 weeks ago. They may or may not apply to a current tree, but I'm working on this area.