[{"id":3674053,"web_url":"http://patchwork.ozlabs.org/comment/3674053/","msgid":"<20260407100427.GS2872@noisy.programming.kicks-ass.net>","list_archive_url":null,"date":"2026-04-07T10:04:27","subject":"Re: [patch 07/12] alarmtimer: Provide alarmtimer_start()","submitter":{"id":493,"url":"http://patchwork.ozlabs.org/api/people/493/","name":"Peter Zijlstra","email":"peterz@infradead.org"},"content":"On Tue, Apr 07, 2026 at 10:54:48AM +0200, Thomas Gleixner wrote:\n> Alarm timers utilize hrtimers for normal operation and only switch to the\n> RTC on suspend. In order to catch already expired timers early and without\n> going through a timer interrupt cycle, provide a new start function which\n> internally uses hrtimer_start_range_ns_user().\n> \n> If hrtimer_start_range_ns_user() detects an already expired timer, it does\n> not queue it. In that case remove the timer from the alarm base as well.\n> \n> Return the status queued or not back to the caller to handle the early\n> expiry.\n> \n> Signed-off-by: Thomas Gleixner \n\nNot familiar with this code, but my head hurts from the:\n\nalarm_\nalarm_timer_\nalarmtimer_\n\nprefixes, what's what?","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","netfilter-devel@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256\n header.s=casper.20170209 header.b=a8FiwdAm;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; helo=tor.lore.kernel.org;\n envelope-from=netfilter-devel+bounces-11662-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org\n header.b=\"a8FiwdAm\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=90.155.50.34","smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=infradead.org","smtp.subspace.kernel.org;\n spf=none smtp.mailfrom=infradead.org"],"Received":["from tor.lore.kernel.org (tor.lore.kernel.org\n [IPv6:2600:3c04:e001:36c::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fqhd15v7Tz1yGf\n\tfor ; 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Tue, 07 Apr 2026 12:04:27 +0200 (CEST)"],"ARC-Seal":"i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1775556271; cv=none;\n b=fnS8nqA0BcJG1PoKiu9auix7L3okqNrcWnbToEuaXEH8JRL07rbubuM4eSTtAnNIM0z/E/bx3ELXh9a0erCjO1FxMrDO7Pocv26pCEKml4tvYLM+of00QSP8J8Xbo65Iir0dRrSybRO1n3c6SqyosUmfiwdxEcT4Gcxun0UPsPs=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1775556271; c=relaxed/simple;\n\tbh=yOY7+KmRjtyw8Q72hV54JYZywu94r/DU9OedaN0htSA=;\n\th=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version:\n\t Content-Type:Content-Disposition:In-Reply-To;\n b=HiNf8OBxKnnegJJfPw5CfzcIrinQBCybSP1HM2gyTMoVHYQjWqwgNq3Lf40TNjIXckQWH59PLFFGTiTKTrGZj5KUlI8p62FqlXbPADqElh4WhicVyb8rynamCJKX4lEJ188NSscTHarYSW+n/uizRcBmTRy+QauNiyaJKXIfPZY=","ARC-Authentication-Results":"i=1; smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=infradead.org;\n spf=none smtp.mailfrom=infradead.org;\n dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org\n header.b=a8FiwdAm; arc=none smtp.client-ip=90.155.50.34","DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n\td=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version:\n\tReferences:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To:\n\tContent-Transfer-Encoding:Content-ID:Content-Description;\n\tbh=T8HUZX93ODTWp3PC34SKmXA5tERstb9SD8VY+5Ru9Yw=; b=a8FiwdAmfzbJJUl3Ffp9Q8g23e\n\tUkjGMD8OHR7D9YD+uzyoPa4Ucigbk52PNJfKKav0gLxT/lI95rzDTTmixVoG+Sj12s76LfYVOpiVF\n\trMXiJoIkcjxVAl5sWoUEcmysVOxgQ5d6BVL19ZGhKLPN/agyGg0hcMos9AnO0Gmy6I8Uc0p4h2+9n\n\t8QRSkh7OPiEvl5LdK/rI7lgbgJfVfFZoYMD2NQQMEiA3f6WZZvJEOhmTf+jAZB6FQE60O6K9keeIq\n\tA+qJqrG6gv82NziEXTrXaOSttQWJr0j6DgTmW4ybqcZ+hNOfjR+7OJcq73eXPDJSWiYJxAgC6cYsI\n\tFHT3569g==;","Date":"Tue, 7 Apr 2026 12:04:27 +0200","From":"Peter Zijlstra ","To":"Thomas Gleixner ","Cc":"LKML , John Stultz ,\n\tStephen Boyd , Calvin Owens ,\n\tAnna-Maria Behnsen ,\n\tFrederic Weisbecker ,\n\tIngo Molnar ,\n\tAlexander Viro ,\n\tChristian Brauner , Jan Kara ,\n\tlinux-fsdevel@vger.kernel.org, Sebastian Reichel ,\n\tlinux-pm@vger.kernel.org, Pablo Neira Ayuso ,\n\tFlorian Westphal , Phil Sutter ,\n\tnetfilter-devel@vger.kernel.org, coreteam@netfilter.org","Subject":"Re: [patch 07/12] alarmtimer: Provide alarmtimer_start()","Message-ID":"<20260407100427.GS2872@noisy.programming.kicks-ass.net>","References":"<20260407083219.478203185@kernel.org>\n <20260407083247.965539525@kernel.org>","Precedence":"bulk","X-Mailing-List":"netfilter-devel@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"<20260407083247.965539525@kernel.org>"}},{"id":3674108,"web_url":"http://patchwork.ozlabs.org/comment/3674108/","msgid":"<87fr5757hj.ffs@tglx>","list_archive_url":null,"date":"2026-04-07T11:34:48","subject":"Re: [patch 07/12] alarmtimer: Provide alarmtimer_start()","submitter":{"id":92397,"url":"http://patchwork.ozlabs.org/api/people/92397/","name":"Thomas Gleixner","email":"tglx@kernel.org"},"content":"On Tue, Apr 07 2026 at 12:04, Peter Zijlstra wrote:\n> On Tue, Apr 07, 2026 at 10:54:48AM +0200, Thomas Gleixner wrote:\n>> Alarm timers utilize hrtimers for normal operation and only switch to the\n>> RTC on suspend. In order to catch already expired timers early and without\n>> going through a timer interrupt cycle, provide a new start function which\n>> internally uses hrtimer_start_range_ns_user().\n>> \n>> If hrtimer_start_range_ns_user() detects an already expired timer, it does\n>> not queue it. In that case remove the timer from the alarm base as well.\n>> \n>> Return the status queued or not back to the caller to handle the early\n>> expiry.\n>> \n>> Signed-off-by: Thomas Gleixner \n>\n> Not familiar with this code, but my head hurts from the:\n>\n> alarm_\n> alarm_timer_\n> alarmtimer_\n>\n> prefixes, what's what?\n\nYeah. I should have named it alarm_timer_start(). Let me fix this.","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","netfilter-devel@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=T4h2cCUq;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=104.64.211.4; helo=sin.lore.kernel.org;\n envelope-from=netfilter-devel+bounces-11669-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=\"T4h2cCUq\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=10.30.226.201"],"Received":["from sin.lore.kernel.org (sin.lore.kernel.org [104.64.211.4])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fqkdW2mxlz1yGf\n\tfor ; Tue, 07 Apr 2026 21:35:11 +1000 (AEST)","from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sin.lore.kernel.org (Postfix) with ESMTP id 53F7630131AF\n\tfor ; Tue, 7 Apr 2026 11:34:59 +0000 (UTC)","from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id DB32D3AEF33;\n\tTue, 7 Apr 2026 11:34:52 +0000 (UTC)","from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org\n [10.30.226.201])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 5B97B3AE1BF;\n\tTue, 7 Apr 2026 11:34:52 +0000 (UTC)","by smtp.kernel.org (Postfix) with ESMTPSA id 2545EC116C6;\n\tTue, 7 Apr 2026 11:34:50 +0000 (UTC)"],"ARC-Seal":"i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1775561692; cv=none;\n b=m33YAg5/AvoKiEV9nRyeOvGqDHPFoB1DlcLCIXnksfze/6YqcRm63d2ktGgQpPoFZgvcR5dQ0g6iNub65fe75FDHQmbfqyHS+AFXkpGJbaM2DIfBa0l598Psut1phOhYEbr2VpmClJ12e6Wa7qF6urllpF6iz25EniAZzTTB7fU=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1775561692; c=relaxed/simple;\n\tbh=9YUToimfNgX1iEDORmfH2a1+7N4GQzss93G8dfjn7xE=;\n\th=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID:\n\t MIME-Version:Content-Type;\n b=O6lkbZQJ55JYgEd2+ZJ9vtgKtjmPbpMGE/SM+nRtvKOgbomzTJgAUK8Qj1etwsOH3ZB82zQNMoK9ls0FyywmO2Sst6B/geaIktox3MY9w50lMy8fPEvEvwI1Itx0MwCNcr046gze/rMQnidiHtFg1iA5QBBBdetyPVG2wOXMjh8=","ARC-Authentication-Results":"i=1; smtp.subspace.kernel.org;\n dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=T4h2cCUq; arc=none smtp.client-ip=10.30.226.201","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1775561692;\n\tbh=9YUToimfNgX1iEDORmfH2a1+7N4GQzss93G8dfjn7xE=;\n\th=From:To:Cc:Subject:In-Reply-To:References:Date:From;\n\tb=T4h2cCUqPSmHABYXH9ls7T8waWlPkOcbpwZuyGm1DVzNg5x4iXCXrhOPaL4qaYFZS\n\t A/IdYXdAL84mW121UZUw7cCbDMGUE7iC631fYOqSIUPfK4IBCe1mGHOKyZZD0ATn/g\n\t RluSEI1SMVpgphGFtLU/DTADxkQJgxybep0IRYDrm2gVQywgv8bbxOJiBPK+aFIdPk\n\t txhniMQ02nkVV00yY0pOHBWTeVJqtgJ1NUHHa/5xjocPEuHepNTVUV3PcaE5IKj7b5\n\t tEP6O2SpqkT3XMTyotXt18Pceala/UXQ8cFgbTbSEhs6fTrw1BiwyDAqgKHL0z75zC\n\t pVMjN5mSpNOTw==","From":"Thomas Gleixner ","To":"Peter Zijlstra ","Cc":"LKML , John Stultz ,\n Stephen Boyd , Calvin Owens ,\n Anna-Maria Behnsen , Frederic Weisbecker\n , Ingo Molnar , Alexander Viro\n , Christian Brauner , Jan\n Kara , linux-fsdevel@vger.kernel.org, Sebastian Reichel\n , linux-pm@vger.kernel.org, Pablo Neira Ayuso\n , Florian Westphal , Phil Sutter\n , netfilter-devel@vger.kernel.org, coreteam@netfilter.org","Subject":"Re: [patch 07/12] alarmtimer: Provide alarmtimer_start()","In-Reply-To":"<20260407100427.GS2872@noisy.programming.kicks-ass.net>","References":"<20260407083219.478203185@kernel.org>\n <20260407083247.965539525@kernel.org>\n <20260407100427.GS2872@noisy.programming.kicks-ass.net>","Date":"Tue, 07 Apr 2026 13:34:48 +0200","Message-ID":"<87fr5757hj.ffs@tglx>","Precedence":"bulk","X-Mailing-List":"netfilter-devel@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Type":"text/plain"}},{"id":3674469,"web_url":"http://patchwork.ozlabs.org/comment/3674469/","msgid":"","list_archive_url":null,"date":"2026-04-07T20:23:04","subject":"Re: [patch 07/12] alarmtimer: Provide alarmtimer_start()","submitter":{"id":85767,"url":"http://patchwork.ozlabs.org/api/people/85767/","name":"John Stultz","email":"jstultz@google.com"},"content":"On Tue, Apr 7, 2026 at 1:54 AM Thomas Gleixner wrote:\n>\n> Alarm timers utilize hrtimers for normal operation and only switch to the\n> RTC on suspend. In order to catch already expired timers early and without\n> going through a timer interrupt cycle, provide a new start function which\n> internally uses hrtimer_start_range_ns_user().\n>\n> If hrtimer_start_range_ns_user() detects an already expired timer, it does\n> not queue it. In that case remove the timer from the alarm base as well.\n>\n> Return the status queued or not back to the caller to handle the early\n> expiry.\n>\n> Signed-off-by: Thomas Gleixner \n> Cc: John Stultz \n> Cc: Stephen Boyd \n\nAcked-by: John Stultz (also with Peter's\nsuggested name change)","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","netfilter-devel@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256\n header.s=20251104 header.b=C9ShAHrh;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=104.64.211.4; helo=sin.lore.kernel.org;\n envelope-from=netfilter-devel+bounces-11704-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=google.com header.i=@google.com\n header.b=\"C9ShAHrh\"","smtp.subspace.kernel.org;\n arc=pass smtp.client-ip=209.85.218.44","smtp.subspace.kernel.org;\n dmarc=pass (p=reject dis=none) header.from=google.com","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=google.com"],"Received":["from sin.lore.kernel.org (sin.lore.kernel.org [104.64.211.4])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fqyM538w6z1xy1\n\tfor ; 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