From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 53BB4C43458 for ; Mon, 13 Jul 2026 07:32:06 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 489D96B0005; Mon, 13 Jul 2026 03:32:05 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 462606B0088; Mon, 13 Jul 2026 03:32:05 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 377A06B008A; Mon, 13 Jul 2026 03:32:05 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 1361F6B0005 for ; Mon, 13 Jul 2026 03:32:05 -0400 (EDT) Received: from smtpin09.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay07.hostedemail.com (Postfix) with ESMTP id A93B1169841 for ; Mon, 13 Jul 2026 07:32:04 +0000 (UTC) X-FDA: 84982934568.09.E60C6EF Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by imf26.hostedemail.com (Postfix) with ESMTP id E7846140007 for ; Mon, 13 Jul 2026 07:32:02 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=linutronix.de header.s=2020 header.b=ZyRRVaaN; dkim=pass header.d=linutronix.de header.s=2020e header.b=d10LyRPT; spf=pass (imf26.hostedemail.com: domain of bigeasy@linutronix.de designates 193.142.43.55 as permitted sender) smtp.mailfrom=bigeasy@linutronix.de; dmarc=pass (policy=none) header.from=linutronix.de ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1783927923; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=eTEFeO/5EIAP2AE6MFktsovFd8RdOZrL0IsFXTdIgCk=; b=ynnjp/pG7SGrvIMfxzDR2BLhZmAdoXn7EQxFcpeSJQnk+u7kn5uugmq0F6zaHbWfhX01/Q odZQ3UFTjd11C3fLlIerLYiawhEbYqtXlJcatBRE4DLK7aXx8STkcNGLPkw8ZNsh4+L7Vt JdocZvwCYTVAtmSTi4UUj6lcrxnwmdI= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=linutronix.de header.s=2020 header.b=ZyRRVaaN; dkim=pass header.d=linutronix.de header.s=2020e header.b=d10LyRPT; spf=pass (imf26.hostedemail.com: domain of bigeasy@linutronix.de designates 193.142.43.55 as permitted sender) smtp.mailfrom=bigeasy@linutronix.de; dmarc=pass (policy=none) header.from=linutronix.de ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1783927923; b=jfhjkQkpzLSNcxEhhwPGJFv5HoOCrLiHkD2JyAT/x2LQbtnaR5KABngxqI8QxNvbbMPAHW OvmSDzTBBePBDMZNogb0d41fw/pb4QutU/6BVKw1Krh2FM6XIJwQOVjYilRLJZpVj8y3Oa UDh+QJp36PjUZwAqx+p8yGiv7R0IYYI= Date: Mon, 13 Jul 2026 09:31:58 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1783927920; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=eTEFeO/5EIAP2AE6MFktsovFd8RdOZrL0IsFXTdIgCk=; b=ZyRRVaaN/a7Av7n45HMCnrFZ7sdvcF8hzCP7uNhbjBapw+aHEDtJjnEs1CrWFw+3ZF2hIv M3jHDVpzqCTVy5G9o5i9LomO/JobmAY9Pz7BMLALFhrVUWJDzrl6lnP1W5As75Uoio+A5w MfIcfb5hkJuJI5oX6N7sHyWavnOgSsI4N1ZJLcXZrbLDcwxD1dnFZSIRBJqDrLp8YLiJnj XAog1JjTU0XA1iv8403f5UcFofcWj69AZt78QBnKQa89hqhHGZGm8vFUTzlQKlRFYg+XoH 2rfRcwR6Jvj2iu3gM56+RHj6Oz3Mvla6+PSMdIiAO+Vfsfn5CgVrCWF8RDyMxQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1783927920; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=eTEFeO/5EIAP2AE6MFktsovFd8RdOZrL0IsFXTdIgCk=; b=d10LyRPTmTNrbrJWbIolbyfdJhyGilwIxdwRklGSZNFcKFiW1zxvaina3PckVO0/A6wCzL oy0ppVgdLkkzKUDA== From: Sebastian Andrzej Siewior To: Leonardo Bras Cc: Jonathan Corbet , Shuah Khan , Peter Zijlstra , Ingo Molnar , Will Deacon , Boqun Feng , Waiman Long , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato , Brendan Jackman , Johannes Weiner , Zi Yan , Harry Yoo , Hao Li , Christoph Lameter , David Rientjes , Roman Gushchin , Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Baoquan He , Barry Song , Youngjun Park , Qi Zheng , Shakeel Butt , Axel Rasmussen , Yuanchu Xie , Wei Xu , "Borislav Petkov (AMD)" , Randy Dunlap , Feng Tang , Dapeng Mi , Kees Cook , Marco Elver , Jakub Kicinski , Li RongQing , Eric Biggers , "Paul E. McKenney" , Nathan Chancellor , Nicolas Schier , Miguel Ojeda , Thomas =?utf-8?Q?Wei=C3=9Fschuh?= , Thomas Gleixner , Douglas Anderson , Gary Guo , Christian Brauner , Pasha Tatashin , Coiby Xu , Masahiro Yamada , Frederic Weisbecker , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-rt-devel@lists.linux.dev, Marcelo Tosatti Subject: Re: [PATCH v4 3/4] swap: apply new pw_queue_on() interface Message-ID: <20260713073158.CHjwei-N@linutronix.de> References: <20260519012754.240804-1-leobras.c@gmail.com> <20260519012754.240804-4-leobras.c@gmail.com> <20260520150736.HZnlFkv7@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: E7846140007 X-Stat-Signature: brdqehzmcondy657dfi43zjipxos6zau X-HE-Tag: 1783927922-167717 X-HE-Meta: U2FsdGVkX19+6wRVg/gCaWojogFxHd5OOLNCGpK0mV2R2wjrlMgcseTAc0vxSUxNkoJ3fDT8o3+FC90GcYI8UXO+YyafbbFT725a1NUwuLBPemeEOHyN+ifPJwrK6bss5NXkUJUURoGHBgH5xcY9pt0CsS352eOyxduapK2wgIwIFJ8yIiiDMbzBdXey31dapJUH2l79g/p+KklwqyytAVIyhoO+81rFujRQG5TnBaNah7iL5lhHt7+5rstqTZu55mxAnSRdbXix8zAffEwDOW9ftYiHi87Y2pRpSSUoi2DV4aIy76MlcnIiLoIAkOtguXQngFum962ssQ+xO5y/I3rwp+4tGle2lFfO3KgV1W2T8VeuM1RbKkoRVMNgzF90TVqXHvefjYzFjxiAONOLkbztBrRAxpJNMkWWAxUyDqBFwOkmWICYGxt0khve8iSZIiTJFeMlJHLR6PNl502aW0wibsN93vKgQCrVl12YYvAmacnkKXAVSYM3+nBa7Ja/NiT4Duqj7M29bDhRW1BC+rmmdNvAMD1gUGluwV+wUssLEpCuGVdZwcgBK4LVYoSczgm9RskK56GUCNrm/DgNzK787AlYQS0OoKlarMgSOQBfbpEr624TxRNUDT/WsEbASQJZOnUrV9r7B6hgEfq6aoM66f+vee/RAaICwlTux6gfTgtJQpNSB4NAoQAWc29KFK6AijLhHI2eUJk6IekzG+tBjDn+4RaWR8+J9L85usRmfqZDt6We6rb9HdRM9uLdVXBajtVgiX+DXeRGNYAn/l9cndOoXRxX8QvSMrdUP4CperYBo+T0AN0+mfBAkLPfJBdyq3lDQH3IgPPmyqObCyu+W6Nboz2FpIiXHr1NA64r4cPyTU0FFH2Nm736ot6ihYdngTALUTkmjdex7/N7OJrGfBvoPzIZ7d4GPFfPhKEkqa4IELyxCWe2czZYaTGhLje0FTP1tJXywczm0VW pJP1KY+M n76qlcInhyKufGe/y5aKUK1R15eWoVhkJSrQuwrZ8zii69rHMYaL4VVNIKFQ+1Ic/2+p05m/UZ++S+o6jZfqm/Kv7Y9f4+gXPyuZxw9WfDjqCJ9XAhi0JK5nLsbzACBFIPs3o7YmDceKrBASHe5Na5W0vtvkh6O9IhWXEjEbQ3qRFbYOvdYV1NYXsgDd/JR4+AzkYPRglmva6sH4YiXZiRyfoAYmmwr/xAbLHEuBcmjTF3RxzR0c4tV884V+MqW+/s/aPeoQdwxCe6ulzKIhn9MH2GI3xtpeXcFUwjNKOggI9cF4ndAgy6h4p8u8VFowFUQv9 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 2026-07-12 18:43:48 [-0300], Leonardo Bras wrote: > > I thought that this improved since commit > > ff042f4a9b050 ("mm: lru_cache_disable: replace work queue synchronization with synchronize_rcu") > > > > Did it get worse or was it not entirely gone? > > > > I worked in this patchset majorly after that commit date, and it was still > an issue up to last time Marcelo tested. Not sure of the impact of above > commit, but I suppose it may have brought some improvements without fully > fixing it. It would be good to know what is still missing and maybe it can be addressed without introducing this remote locking. > Thanks! > Leo Sebastian