From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej2-f5.google.com (mail-ej2-f5.google.com [74.125.228.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E27A13546CF for ; Sat, 10 Oct 2026 16:16:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.228.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791648981; cv=none; b=R4OCtW0i7cuKACyr16x36suODUJVAwsbDpVXCH9z/rP9PPCss6gS38Dgc79kV+PJISZ5KUUWcN+5NoKlA5vDiF0JsW5DZ33UizerKqxJaNjyG0P8zdz4lW41zVodwXepZimB7hKnFD+cOdtwS3rPDjlVM87jAWKc0KzmziaGKvU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791648981; c=relaxed/simple; bh=KutDEGCPlONJfWW9uuDS3X3faNGEyX+psz2/OPeNoAo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=E/w0S9hlJeRTTInmd6vRAwzCby8FbnXznyV8nKNZtVm+vYpkpMGaAVOCif+FSmpCvEL+y6Tr8EB8pxMu9zHsovpwXZ7UH27nq3jimi4Dp/6Qa/nFTmk+LCyLC4nhDFJBk0YnsKCnOZkUnsqP/GFXSspGOxf/IS6nIT6XXlsS6Aw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=d7dQRgQg; arc=none smtp.client-ip=74.125.228.133 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) header.d=gmail.com header.i=@gmail.com header.b="d7dQRgQg" Received: by mail-ej2-f5.google.com with SMTP id a640c23a62f3a-c3305a41e91so27247266b.1 for ; Sat, 10 Oct 2026 09:16:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1791648978; x=1792253778; darn=lists.linux.dev; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=fjHNOUUglm75EsN4v1/xErxWOdU79LqCoAd2dMeTVTk=; b=d7dQRgQgtgupqlfLbPpvKZ8WnteHDTMgAomkxyCf3b5Hzn/xMpoagOK4bReB6l38fJ 0sn8daYLHQPLf3oq0nS/Hx+HfzSs9HxVqAHE6ktT/trjZPkb/sjW4EjqHUGFT62Ji/uU 4AOg27DopihS5vNZ7gdcbnb0cweg9s7yA1oZv9FJNz/+gi+nNUw6UiT4lR3QBGnC6Eek AUzwc880sRmXoEehtHN5XYAewKz5uKaVfaReTY2SQ05ZAtSoJso9eNye0smKJZ2Yz3zc P3FmWepA8o3+ouDGIFllKM+cMVKMbhyrMrfoLLe5Cdd69ptneyTLsxte3z4j3WOmoO8m 83MA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1791648978; x=1792253778; h=content-transfer-encoding:mime-version:references:in-reply-to :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=fjHNOUUglm75EsN4v1/xErxWOdU79LqCoAd2dMeTVTk=; b=V0sdOtM42wTvkyptlrlGG05gnWxOaJK+IsBs6kqS1HtjCHEo3fsO5/fAi2NVr7ZXqm cvU4u//OTH0rncLnJkj2fh5Yw62w0QPqWmRhuTCrsiyCnwoXArGdh9+xfwke0AT9Gb+J f07da9KvjE76eBcguPwGVI8QR7dxkBSF3H7hbpqkH2I18oRKEDhvgoljVH5vy4OLcw0n AmeZ4SxIiLtVGii+zW2t18HfHn+RI/OS8RCyX6adoPXPR3AtbHjzpaB7tAVEWfazgbM6 uJjZxVE9lk6bWXf0etb7fzyGhPRBkW7neDYMDFzZt93wwiObPU5OHjAwHkoGULFftcU5 Eq4g== X-Gm-Message-State: AFq9FYKOaaEkBn4DkP/oBycvQhFLPm3u77B9qtOlryenSg7l+LEyLjuS IcD9ObRedWxaZEwvsmofvzF88jJAJP/skoNfnY1v3uPOsxfpvRPx3zHDk4YTOHxYvS9ZLw== X-Gm-Gg: AYBFou0+AEPwiwWoAuwKgT4kri2sQn5xUoTllwfrx8H0zUjymS40BrTx87gRfjapcY7 Oo7YhY69vplc+Th8v8Bh3dU2VmAQFcDok9IjU+6Ee+QEGdLSg9TTl3qdKE+C7+g/pLs++Hb9gcX dYY75I9L9hvQwg56Hqb1kuRc+fZv22s7iBcavXieb3yYhHBBdn+9vmWQGxgYZUCT4U1ziUGVsHj /2LYih+mwfcXokd/K9QfpGpXDUZJFfvj+ABc0aWG2AML7+NqXeh2C0l3BAQWCAMHIEzW4PiJ9+7 Tdq+xnWVA88SO85py2q+wup3iIFxBjsoeQJA4tX8cbKUtoG/UbLyQkd9HmFN1NON5zgaw9Jl9ZD +yOfbIA6oEYX4DAyiWWEEeblLbMNOOsfGzxrJ3UHT6WUDzLbXA9vIt4lrCmVBGKY7vCBKrhdlm2 xIe+uXcBqAgK2GIZZVZ36Ls+JL+OGZeowCG0N4vXCf0FFdAawgBNqC9vtOLlBDHd5DbSG4zdgEQ aoCHt+4neSQGP+sDbuk0GmTNotu5j4uJCAJMh0SPXYHxXyGERsRl/dciQ== X-Received: by 2002:a17:907:1c89:b0:c2e:2d8c:4585 with SMTP id a640c23a62f3a-c31a9fdb266mr555312866b.36.1791648978017; Sat, 10 Oct 2026 09:16:18 -0700 (PDT) Received: from localhost.localdomain (87-205-122-125.dynamic.inetia.pl. [87.205.122.125]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c31a9a74bd7sm261422066b.37.2026.10.10.09.16.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Oct 2026 09:16:17 -0700 (PDT) From: illofspeed To: dm-devel@lists.linux.dev Cc: agk@redhat.com, snitzer@kernel.org, mpatocka@redhat.com, bmarzins@redhat.com, hare@suse.de, dlemoal@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 3/3] dm zoned: keep polling for idle reclaim after a reclaim pass Date: Sat, 10 Oct 2026 18:16:13 +0200 Message-ID: <20261010161613.396-4-illofspeed@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261010161613.396-1-illofspeed@gmail.com> References: <20261010161613.396-1-illofspeed@gmail.com> Precedence: bulk X-Mailing-List: dm-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit dmz_reclaim_work() re-arms its DMZ_IDLE_PERIOD poll only when dmz_should_reclaim() returns false at the start of a pass. After a pass it calls dmz_schedule_reclaim(), which queues the work only if reclaim is needed right now. When a pass ends while the target is still busy and has enough free zones, nothing is queued at all. Once the target goes idle, nothing re-evaluates dmz_should_reclaim() until new I/O arrives or user space sends a "reclaim" message, so the random or cache zones that filled up under load stay full. Seen on md RAID5 members on 27 TB host-managed drives: after heavy writes the random zones stayed full for hours on idle targets; the workaround was a timer sending "dmsetup message 0 reclaim". With this patch the emptied and filled zones were reclaimed within minutes of the targets going idle, without the timer. After a pass, requeue the work immediately if reclaim is still needed, otherwise re-arm the idle poll. Fixes: 3b1a94c88b79 ("dm zoned: drive-managed zoned block device target") Assisted-by: LLM Signed-off-by: illofspeed --- drivers/md/dm-zoned-reclaim.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm-zoned-reclaim.c b/drivers/md/dm-zoned-reclaim.c index 2bcc163d209..7feb2628bd0 100644 --- a/drivers/md/dm-zoned-reclaim.c +++ b/drivers/md/dm-zoned-reclaim.c @@ -557,7 +557,16 @@ static void dmz_reclaim_work(struct work_struct *work) } } - dmz_schedule_reclaim(zrc); + /* + * Keep the worker alive: when a pass ends while the target is busy + * with enough free zones, dmz_schedule_reclaim() queues nothing and + * the idle poll is never re-armed, so zones filled under load are not + * reclaimed once the target goes idle. + */ + if (dmz_should_reclaim(zrc, dmz_reclaim_percentage(zrc))) + mod_delayed_work(zrc->wq, &zrc->work, 0); + else + mod_delayed_work(zrc->wq, &zrc->work, DMZ_IDLE_PERIOD); } /* -- 2.43.0