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 B38FDD3EE8A for ; Thu, 22 Jan 2026 16:26:19 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 26FC26B02A1; Thu, 22 Jan 2026 11:26:19 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 2474C6B02A2; Thu, 22 Jan 2026 11:26:19 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 11F666B02A3; Thu, 22 Jan 2026 11:26:19 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id F28736B02A1 for ; Thu, 22 Jan 2026 11:26:18 -0500 (EST) Received: from smtpin29.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 9FBA5B8724 for ; Thu, 22 Jan 2026 16:26:18 +0000 (UTC) X-FDA: 84360127236.29.AA06538 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.223.130]) by imf23.hostedemail.com (Postfix) with ESMTP id F3195140007 for ; Thu, 22 Jan 2026 16:26:15 +0000 (UTC) Authentication-Results: imf23.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=jJKKItUR; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=Dk8Q9Jze; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=kL36N72O; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=13PF3AMW; spf=pass (imf23.hostedemail.com: domain of vbabka@suse.cz designates 195.135.223.130 as permitted sender) smtp.mailfrom=vbabka@suse.cz; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1769099176; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=lhAO6JRvDmgniWiT+4x4JmaEjz5+uH6dH2x0bAyzNW4=; b=ZDP1LqGzeTeHLjlNL/HhvU4MsvHXI0mITyzy9/wsc/yPYAcONYE0v4iv8Y7madZIVgRuOu 8enGMRZYaTgTUIo7jPOWwXt7YBsfdHvNMskcPROEVp8tnqpdfOd3KVFZHkQXNkRDpIQsG0 3dm3Yd89mSqcbDvq/AEII8DdQLX46Fw= ARC-Authentication-Results: i=1; imf23.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=jJKKItUR; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=Dk8Q9Jze; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=kL36N72O; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=13PF3AMW; spf=pass (imf23.hostedemail.com: domain of vbabka@suse.cz designates 195.135.223.130 as permitted sender) smtp.mailfrom=vbabka@suse.cz; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1769099176; a=rsa-sha256; cv=none; b=Rwd6i0Mfp5abB6I7ySeF4mdoex9eVCU+B0zkih8LztUcB2zqQlzD3WSslxkHZKstnKyAJP z+ildeOZJRjWx8Hig8VvAQVwSbTyLZp5euMSVe80gl8+KcwmzyVGYSwAL4iYG6YJcmoIN4 vn1I5xN3cGmED7J3bqqFQnXCS+OIKJI= Received: from imap1.dmz-prg2.suse.org (imap1.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id EBE4E336C9; Thu, 22 Jan 2026 16:26:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1769099174; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=lhAO6JRvDmgniWiT+4x4JmaEjz5+uH6dH2x0bAyzNW4=; b=jJKKItURmgece1TxMBzVqICRtrRaWH4bi9sSOMofdpKEjOrjkVp8MXMVFr9OzM/QNzpUFM k5u/7PLc9Pk3Pehw4W+9if9HoohZ1lirvQkgNq4DK24WmAj2Tzifkw+3FyLxox9r6cI7z2 FfJ+9ZXGTgWv011ow1Obuk5qKt6af0E= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1769099174; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=lhAO6JRvDmgniWiT+4x4JmaEjz5+uH6dH2x0bAyzNW4=; b=Dk8Q9JzeQ0XFx0pcsQB7lolqcDY2bg1bzejIy8RSXnW2uUkGiwKuI61z8TXoV1QOQam/9m H0Rx1FEP/PUrymAw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1769099173; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=lhAO6JRvDmgniWiT+4x4JmaEjz5+uH6dH2x0bAyzNW4=; b=kL36N72Oet36756J/1vuwz8owAMhV2/prKIPiGTIMGjIBvPEfcAbdgipiQa6unAz1i11TP LPabOQS0CUykRzuqlY4q6F3IJigWRPCS1JdqZ+MV6q/7AdpZIjl8/4yEKgnyhj5FbFQT+p WGks+SY5bmLAEuFz5X6phqSl+jMY+lg= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1769099173; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=lhAO6JRvDmgniWiT+4x4JmaEjz5+uH6dH2x0bAyzNW4=; b=13PF3AMWNDe+efLmUcgmWXxsv/urwyiwIm3npK6io0t1DBmpQl02NiYvPGaUIiMYV2ml+7 3c+CaNIrkPP9sKAQ== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id AF7A913533; Thu, 22 Jan 2026 16:26:13 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id pxqAKaVPcmkoGwAAD6G6ig (envelope-from ); Thu, 22 Jan 2026 16:26:13 +0000 Message-ID: <6c8b63cc-d357-4e70-89d4-07afd004bc83@suse.cz> Date: Thu, 22 Jan 2026 17:26:13 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RESEND v3 01/10] mm/vma: rename VMA_LOCK_OFFSET to VM_REFCNT_EXCLUDE_READERS_FLAG Content-Language: en-US To: Lorenzo Stoakes , Andrew Morton Cc: David Hildenbrand , "Liam R . Howlett" , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Shakeel Butt , Jann Horn , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev, Peter Zijlstra , Ingo Molnar , Will Deacon , Boqun Feng , Waiman Long , Sebastian Andrzej Siewior , Clark Williams , Steven Rostedt References: From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSBWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmN6PsLBlAQTAQoAPgIbAwULCQgHAwUVCgkICwUWAgMBAAIe AQIXgBYhBKlA1DSZLC6OmRA9UCJPp+fMgqZkBQJnyBr8BQka0IFQAAoJECJPp+fMgqZkqmMQ AIbGN95ptUMUvo6aAdhxaOCHXp1DfIBuIOK/zpx8ylY4pOwu3GRe4dQ8u4XS9gaZ96Gj4bC+ jwWcSmn+TjtKW3rH1dRKopvC07tSJIGGVyw7ieV/5cbFffA8NL0ILowzVg8w1ipnz1VTkWDr 2zcfslxJsJ6vhXw5/npcY0ldeC1E8f6UUoa4eyoskd70vO0wOAoGd02ZkJoox3F5ODM0kjHu Y97VLOa3GG66lh+ZEelVZEujHfKceCw9G3PMvEzyLFbXvSOigZQMdKzQ8D/OChwqig8wFBmV QCPS4yDdmZP3oeDHRjJ9jvMUKoYODiNKsl2F+xXwyRM2qoKRqFlhCn4usVd1+wmv9iLV8nPs 2Db1ZIa49fJet3Sk3PN4bV1rAPuWvtbuTBN39Q/6MgkLTYHb84HyFKw14Rqe5YorrBLbF3rl M51Dpf6Egu1yTJDHCTEwePWug4XI11FT8lK0LNnHNpbhTCYRjX73iWOnFraJNcURld1jL1nV r/LRD+/e2gNtSTPK0Qkon6HcOBZnxRoqtazTU6YQRmGlT0v+rukj/cn5sToYibWLn+RoV1CE Qj6tApOiHBkpEsCzHGu+iDQ1WT0Idtdynst738f/uCeCMkdRu4WMZjteQaqvARFwCy3P/jpK uvzMtves5HvZw33ZwOtMCgbpce00DaET4y/UzsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZ8gcVAUJFhTonwAKCRAiT6fnzIKmZLY8D/9uo3Ut9yi2YCuASWxr7QQZ lJCViArjymbxYB5NdOeC50/0gnhK4pgdHlE2MdwF6o34x7TPFGpjNFvycZqccSQPJ/gibwNA zx3q9vJT4Vw+YbiyS53iSBLXMweeVV1Jd9IjAoL+EqB0cbxoFXvnjkvP1foiiF5r73jCd4PR rD+GoX5BZ7AZmFYmuJYBm28STM2NA6LhT0X+2su16f/HtummENKcMwom0hNu3MBNPUOrujtW khQrWcJNAAsy4yMoJ2Lw51T/5X5Hc7jQ9da9fyqu+phqlVtn70qpPvgWy4HRhr25fCAEXZDp xG4RNmTm+pqorHOqhBkI7wA7P/nyPo7ZEc3L+ZkQ37u0nlOyrjbNUniPGxPxv1imVq8IyycG AN5FaFxtiELK22gvudghLJaDiRBhn8/AhXc642/Z/yIpizE2xG4KU4AXzb6C+o7LX/WmmsWP Ly6jamSg6tvrdo4/e87lUedEqCtrp2o1xpn5zongf6cQkaLZKQcBQnPmgHO5OG8+50u88D9I rywqgzTUhHFKKF6/9L/lYtrNcHU8Z6Y4Ju/MLUiNYkmtrGIMnkjKCiRqlRrZE/v5YFHbayRD dJKXobXTtCBYpLJM4ZYRpGZXne/FAtWNe4KbNJJqxMvrTOrnIatPj8NhBVI0RSJRsbilh6TE m6M14QORSWTLRg== In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Action: no action X-Rspam-User: X-Rspamd-Queue-Id: F3195140007 X-Rspamd-Server: rspam07 X-Stat-Signature: 4h1kzemoouqpueq7cqhoi51871ohz1m4 X-HE-Tag: 1769099175-664687 X-HE-Meta: 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 y5opPgPQ ixTTFTMdqd5xBSEJLyc/lwzyEO2KqsO/KdTcUSYGZ4XWj4x6g+SiFFpZVbuGQvKCfJVdlVzwO6qk2tlyEYPMduLljl/UCb5Jj6GcC86TXCmJsJEqeO906/FWbELV3isjDy410NlmTV0oCl9+UFgdmhGp+1mD9XBYTZVPU7TcvSkcNZ8ydPv644Ngr8TXFVsVJElzfmNXhq3WIJUfaed47Z7GXmpF9g43bsmmqzpEpBfnodqlpsGt4tr/uImTuRp8tmtcShd1aXW1GUgmaW7GQiNz9HSb+xGqjAe097TVLcBWul83qBRuk8gQF0LR5xGN5cT/DmlVDdzYrfyGLV1zE20Le0pnpFIZCvGKptY/UWrXrt/+NDuhu5EJ2DJW5jHiqRQSKQB3q1zcT2GrHggz59yHp8cHwymF9wak7gUSRcwvDmx4= 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 1/22/26 14:01, Lorenzo Stoakes wrote: > The VMA_LOCK_OFFSET value encodes a flag which vma->vm_refcnt is set to in > order to indicate that a VMA is in the process of having VMA read-locks > excluded in __vma_enter_locked() (that is, first checking if there are any > VMA read locks held, and if there are, waiting on them to be released). > > This happens when a VMA write lock is being established, or a VMA is being > marked detached and discovers that the VMA reference count is elevated due > to read-locks temporarily elevating the reference count only to discover a > VMA write lock is in place. > > The naming does not convey any of this, so rename VMA_LOCK_OFFSET to > VM_REFCNT_EXCLUDE_READERS_FLAG (with a sensible new prefix to differentiate > from the newly introduced VMA_*_BIT flags). > > Also rename VMA_REF_LIMIT to VM_REFCNT_LIMIT to make this consistent also. > > Update comments to reflect this. > > No functional change intended. > > Signed-off-by: Lorenzo Stoakes Reviewed-by: Vlastimil Babka git grep tells me VMA_LOCK_OFFSET is still used in tools/testing/vma/vma_internal.h but I guess it doesn't break the tests?