From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=209.85.208.52 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793602914; b=vDt/KbwAOAQVyd3fFP6aI1+g8EwVehH4CIgtlcbNjT5RRE6br639a6DqTwtUWDjkw/my tOExUTHnOa1kdvNa4cWkwqWgLUbcZrxFaB4BmZJ0vsb7OAbVV55uHWqfVgD9gW9K427h0 OlVlz9/QtiZvjxyB7sInb0zFtIE6NIGlrdKMnD7trxiyqLahLV6OEIVTJN8j97Dye/ZK6 i2ZMzs0P1eOfwnHmCoZ5H8hfHa7jIFf7GV7Iu5MeYMRz0quyyqUo0U6fs59YhUt1Fdhin rl/5ui0q4B32tDXsOapgkg/y8NSo1Ms1QesC+vCj85hoppH/fkhqxNQ4OKpj8KiTbCQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793602914; h=DMARC-Filter:Received:DKIM-Signature:X-Google-DKIM-Signature: X-Forwarded-Encrypted:X-Gm-Message-State:X-Gm-Gg:X-Received:Received: From:To:Cc:Subject:Date:Message-ID:X-Mailer:MIME-Version: Content-Transfer-Encoding; bh=TFrwAf3wYXNxoR0JQCwLQKVfKkU5+LXdIBOmYaVR4HE=; b=ZHgHbOo7FFPwV1iEXA6M2Ts6YwZ5Vftjo8asFf0KzqaHZyM8MZavT6XZnDKZ6ZElfd0P VyoHcdktvlxW4CVrbsn8E9ZcAIIdS92O6tmVZP5lOrrHXz+wVsm+yU4hkTsLDuRyZGAmd Pnj8VrD8RVmR+6joWV5m098DyGPDpWMTBR+woXzZvFhIIUiBYE2vDrPK7ToixVhn1Xkcs vo1Vd98Dvs4/MaZnbB+VBJwTWgQLa3KdzEd4TlyMkTRxnqo40Z0XbScpUBnLkNcLxuoBJ VUliwrHD0wcjCC8GlwxXEdhMcd1a6Kvv5bmE7p8HCshjbJ/obKot9l4WTANrxcjnFFw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20260707 header.b=bC86Q7o5; arc=none smtp.remote-ip=209.85.208.52 Received: from mail-ed1-f52.google.com (mail-ed1-f52.google.com [209.85.208.52]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 34A9B606A324 for ; Mon, 2 Nov 2026 07:01:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 34A9B606A324 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20260707 header.b=bC86Q7o5 Received: by mail-ed1-f52.google.com with SMTP id 4fb4d7f45d1cf-6b488586facso3338830a12.2 for ; Sun, 01 Nov 2026 23:01:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20260707; t=1793602912; x=1794207712; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=TFrwAf3wYXNxoR0JQCwLQKVfKkU5+LXdIBOmYaVR4HE=; b=bC86Q7o5SJjrFjl8XuDTaDkDOxt9pHLZYSwPjfWXOWFp9L6MTaxZgUyjfkfK7wiRxs ssjHgqGpjyYjKaksgKP73NeDWTXb0cSWY9kfvEnhoMRc5LITndmaCgND6EudybXoaCAp VI/qx12hWpiQ3+Eb6bCRWy5bswqh9zLldI50XQGCpm/cz0O5NWq6vYksf/OjdEJBEXCY NdNncdhBrc3iOOlfS8pXZ/34bO1h7SLcy9uHObOOFImhcqZIzLxIannjvjzjV28pw9xS SXM7BBzDjIz19zAWi02tyLR5Ilfo2+WOEcEHIK3LYf66a2/OJsydF9hrBhKL+4PFdnVl iGgQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1793602912; x=1794207712; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=TFrwAf3wYXNxoR0JQCwLQKVfKkU5+LXdIBOmYaVR4HE=; b=BpmbiB/THGog5MchqgKJy28m2lizM/Yt3858L8d9BsYXHiLlfmBdIIGE+7prWDAvNa R7Ff1XgkEEGMYtV34pxT4QyUGqBxVL5oYO60WvOfZYKaSMfxnVaCympZ4hIhl92xj+tz i1L9zRQ4gs0J+mOXB/TMAY1edaUYWHpBKu/kZRBs3SOrmuHpoY9vCtHi0k6SQOpMMjyn h+a5ulM/ibK3PnU0Vdx7KDp1xy/T01gEPBW7eqlBxdT8Pm/hCsejuceTAy9z3BMxhf26 w28ju6iNZMcdUFTRGwiQsnJzsIjjS1IGJSpPT99xD8y2RivZPOFUfLRWEHxp9F2H0GAW XBXw== X-Forwarded-Encrypted: i=1; AKwUvByZd1qN+E8igNhu3LaHzDBS2TaknHGxupuc8xL9BXErihgxj49IHytS3vgzCuerIh8o7zkBkn6gv+xzOIE=@vger.kernel.org X-Gm-Message-State: APuU4Z9ww9OmlQi8uRomGZGUQkf+Cy3D6Wx6z8wF7ryGap/xM3veYcvD RuTh9TGqLeL5mTVD6DOt77KaonMiUKMVcWLTrvSywlsomncHm+FjJcxW X-Gm-Gg: AYBFou3MaKWNYqWJ1yB6wUvdH2nDRyZgqMxjgTTOEMRZbchc/FGCgMHwLJ0kYgT7G3V wsvLxXK+hTSuqWpQJY8jmvddnBs4HsdJb0bdQIb3s0fVPlbQgqlJr0aIGakxQ+ZSQvi+Y776Acr TXB8L3e05tVR5A0x2CeUSkyWe8pgF4z2bGrMQXdTiOXfjceCqFuc/h93Lk7m1ZVShXzYsJ7Ol5+ bGsVE1eEiWJxqvqUeLj8glfTnFe05kzlEmwc7GsJ1oj4lhXiDu4yyb7ih1o+9tdRQDAOvPsH2l2 ehKBWTLDNjchOAG3UeVbzSvM+tzgtEw13qmO9YDka0Jv61SzbJwzDTLhX4OCBpTXjB4jzu277JP 8FhNQJ64grPQNCUuChQoFBbiDRrnUe2IjAswb2/tDRJrIYbIatvJEsrc3p289LdWyofkpU5JTJ8 tmaIIEAOP/XmxQUAREpyVro/VYb85cQCmRXId1Lg7WcKVLFxf+9T/T5hh8jSpdM+HNXpY0bHgFE HWl/dmdVy6xZ5YHHpvrGbS0x9UTK5Rfu/uAHuusrOEm9EMtksheEAFu3J7NQYwXc8UEYF4dqlXg pOVpZuKa6Tu8YM0XdHz8CrUQRudo0JkMeSg= X-Received: by 2002:a05:6402:c4ca:20b0:6b4:1cf5:2202 with SMTP id 4fb4d7f45d1cf-6b4d438a5bfmr4526477a12.12.1793602912404; Sun, 01 Nov 2026 23:01:52 -0800 (PST) Received: from LAPTOP-AVI.lan ([2a06:c701:4773:6f00:f970:5a5f:bc55:da4]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48e71b8c0b6sm17580579f8f.41.2026.11.01.23.01.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 01 Nov 2026 23:01:52 -0800 (PST) From: Avi Weiss To: Anna-Maria Behnsen Cc: Frederic Weisbecker , Thomas Gleixner , linux-kernel@vger.kernel.org Subject: [PATCH] timers/itimer: Preserve nonzero remaining time for active timers Date: Mon, 2 Nov 2026 09:01:49 +0200 Message-ID: <20261102070148.1064849-2-thnkslprpt@gmail.com> X-Mailer: git-send-email 2.43.0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit itimer_get_remtime() preserves positive remainders below one microsecond, but struct timeval only stores whole microseconds. So, for example, the conversion to tv_usec truncates a 500 ns remainder to zero, causing getitimer(ITIMER_REAL) to report an active timer as disarmed. Clamp active remainders below one microsecond to one microsecond so they remain nonzero after conversion. Fixes: 2ff678b8da64 ("[PATCH] hrtimer: switch itimers to hrtimer") Signed-off-by: Avi Weiss --- kernel/time/itimer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/time/itimer.c b/kernel/time/itimer.c index 03a32dffc56c..a472a4f8babb 100644 --- a/kernel/time/itimer.c +++ b/kernel/time/itimer.c @@ -36,7 +36,7 @@ static struct timespec64 itimer_get_remtime(struct hrtimer *timer) * then we return 0 - which is correct. */ if (hrtimer_active(timer)) { - if (rem <= 0) + if (rem < NSEC_PER_USEC) rem = NSEC_PER_USEC; } else rem = 0; base-commit: d135ab453a7400a34930bdda1ef4bdc8acfac80e -- 2.43.0