From nobody Fri Apr 3 06:22:43 2026 Received: from mail-wm1-f48.google.com (mail-wm1-f48.google.com [209.85.128.48]) (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 2DA5B30DD36 for ; Wed, 18 Feb 2026 16:56:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.48 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771433791; cv=none; b=WNqwCWuizsOJ0lfxpMaNKY4bxpMbRuhtxvg2dcI1zLtyASknB/Zo56mVUMaLFIz0Q5bZe8Iy+FSYBAFp5bIJeRsUcjv+mmwxa8K2MdidpmVHhRavBkIeKEsJOJCnIOJN4WVuUiQzjeIYXU/M7swZZo8J322q4UjAzvxMZ/fh2qo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771433791; c=relaxed/simple; bh=eu5qGor+Ocr8H8dpqM3t3TgMpTKujUecPG4BPGS6bew=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=cpsmE39cSAVQRPDOC+vWknC5o3VYTLUOaJAO+KxlL90cKLION+FKjQiaCBtRJ+SvivGd9uwoJjG4SuxH7mYj1pEcTeOpTsUe17Hqcsey6jEhNNu8E3ZBwihx1RsaPxbS5tMUaC5VEt5hsCg8VvuyjFKQn6daU+bpB+Qqlxqx7AQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com; spf=pass smtp.mailfrom=suse.com; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b=PLGm7tfJ; arc=none smtp.client-ip=209.85.128.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b="PLGm7tfJ" Received: by mail-wm1-f48.google.com with SMTP id 5b1f17b1804b1-482f454be5bso10660615e9.0 for ; Wed, 18 Feb 2026 08:56:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=google; t=1771433788; x=1772038588; 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; bh=elzy5JOSmtPeHgoS3qukWz3CcOnWYEZc+4cPnyfUXGQ=; b=PLGm7tfJoSur/00fJkQPib7vyQu0HeIhSihN6UcRczER8+xS7xXIBWLPACfJXbMOxe tkTj4kfJy8pPNG/JamQ6bdsxJz+tDWvb9DLu1sgX1xb5Ndy9RlXPuDNCfEakbe5JjPWT LPww/X1gOHRyV2v8BymR06VWE2LkYHlt5mRYn9E2cvupWM4E+v3iwWTlsY054u4CmMYD 6oGB/e+ymeWDftS6nA/suyLRFEB9M0AR666WHoK5YH2rGLxw1+kzxx6QOMCkKMFcwxw8 dz5HHjh88QL6VUoKnrQzvPSByo1/aNncR0Gjpa6LpUqaK8ZFDvvZKgvflvtDHEDEwr60 8jTw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771433788; x=1772038588; 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; bh=elzy5JOSmtPeHgoS3qukWz3CcOnWYEZc+4cPnyfUXGQ=; b=TsQyCZyIdEkk54ClSkd/Pwfw2OM29h61VdVHCCEMN9NeUm1GMJHpRuD6X//+3sZzje z1luOIBbi+jz4wgKVyEpRQINPDfBpPctv6rT5GAM/R2kTJkCjleoL8fW3ZMmLXEAhmRf gAn59SgeiZ2laA2x0MfsMiUGr/j5SQhxysrfQ2IpQVhZdwtxg9JOxKrwtJgg6Pt/Hewf BnNNyIi2Z9BO4pOEsLQT2R6H17rY6QLQFK4HGOXM2HKfKJH8hxdKMD51KvAF66S6jwal AlN1azI9nTpJdy8tJIoPtfWCRYsQdDpkpJRIMSaQzuUgtW2R2ZZHRvOkA65gCe9OsqeH eYEg== X-Gm-Message-State: AOJu0Yxc8EmckI1zDr0fea53ZWepdw92IkwgHxlQlDzhaopMH1H7Di+r OTjFB5BH5Rs5RDMSaKHrBeNPNdo9FeQpE7X+m62w7Bbh2NaRCZtn0Qj2Xt+TJ0zXqMuJGWu/JOl Iukvo X-Gm-Gg: AZuq6aIBDS0KOsBwmscgUdH1d8sq/MG/K7vGzIcYLO1eRJfUvEWkjwgFuWoxmBxJaZi JdL5QCxh29kUCRV8bJxObmxS7hF1ahlEjyOAa7Ttj/R0y/YeOdm9Rpm6q10jr8DFv+4TCC3yv7F Vf6M39+jyTdXcuBy+a1X+WqimnsZpAsJbQ1bMZdotIuPw67/6AVkzxdXGOZNCFd1B7zS6k+6tVq yoV/4TU7ESeFDricR0uSz7b/NtVa9DxFxDXt59ZLa0t69r8CsO6tUyfxu9BIoiQwre4zga5RsJ4 QoA3WBBgGgk9+8cB39J3foka9T89h94BoTHtSINKUD0droN9TUlnKuvxchsbhavCLx33EyiEq1Y M46L1ejDJxlfiRlD21UVVRXqXJF/iu7z6mohk+rEjGVNPXMcXhKDFjnrOaQ9rkHnN650PL4quNF 16X0gjYPxiPKCLWwDABdIuqSS0 X-Received: by 2002:a05:600c:41c3:b0:483:7eeb:4558 with SMTP id 5b1f17b1804b1-48398c5afa3mr26299875e9.2.1771433788203; Wed, 18 Feb 2026 08:56:28 -0800 (PST) Received: from linux ([2a00:6d43:105:c401:e307:1a37:2e76:ce91]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-483983b837fsm31645435e9.5.2026.02.18.08.56.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Feb 2026 08:56:27 -0800 (PST) From: Marco Crivellari To: linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org Cc: Tejun Heo , Lai Jiangshan , Frederic Weisbecker , Sebastian Andrzej Siewior , Marco Crivellari , Michal Hocko , Anthony Iliopoulos , Carlos Maiolino Subject: [PATCH] xfs: convert alloc_workqueue users to WQ_UNBOUND Date: Wed, 18 Feb 2026 17:56:09 +0100 Message-ID: <20260218165609.378983-1-marco.crivellari@suse.com> X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Recently, as part of a workqueue refactor, WQ_PERCPU has been added to alloc_workqueue() users that didn't specify WQ_UNBOUND. The change has been introduced by: 69635d7f4b344 ("fs: WQ_PERCPU added to alloc_workqueue users") These specific workqueues don't use per-cpu data, so change the behavior removing WQ_PERCPU and adding WQ_UNBOUND. Even if these workqueue are marked unbound, the workqueue subsystem maintains cache locality by default via affinity scopes. The changes from per-cpu to unbound will help to improve situations where CPU isolation is used, because unbound work can be moved away from isolated CPUs. Signed-off-by: Marco Crivellari --- fs/xfs/xfs_log.c | 2 +- fs/xfs/xfs_super.c | 12 ++++++------ 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index a26378ca247d..82f6b12efe22 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -1441,7 +1441,7 @@ xlog_alloc_log( log->l_iclog->ic_prev =3D prev_iclog; /* re-write 1st prev ptr */ =20 log->l_ioend_workqueue =3D alloc_workqueue("xfs-log/%s", - XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM | WQ_HIGHPRI | WQ_PERCPU), + XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM | WQ_HIGHPRI | WQ_UNBOUND), 0, mp->m_super->s_id); if (!log->l_ioend_workqueue) goto out_free_iclog; diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 8586f044a14b..072381c6f137 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -592,19 +592,19 @@ xfs_init_mount_workqueues( struct xfs_mount *mp) { mp->m_buf_workqueue =3D alloc_workqueue("xfs-buf/%s", - XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM | WQ_PERCPU), + XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM | WQ_UNBOUND), 1, mp->m_super->s_id); if (!mp->m_buf_workqueue) goto out; =20 mp->m_unwritten_workqueue =3D alloc_workqueue("xfs-conv/%s", - XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM | WQ_PERCPU), + XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM | WQ_UNBOUND), 0, mp->m_super->s_id); if (!mp->m_unwritten_workqueue) goto out_destroy_buf; =20 mp->m_reclaim_workqueue =3D alloc_workqueue("xfs-reclaim/%s", - XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM | WQ_PERCPU), + XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM | WQ_UNBOUND), 0, mp->m_super->s_id); if (!mp->m_reclaim_workqueue) goto out_destroy_unwritten; @@ -616,13 +616,13 @@ xfs_init_mount_workqueues( goto out_destroy_reclaim; =20 mp->m_inodegc_wq =3D alloc_workqueue("xfs-inodegc/%s", - XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM | WQ_PERCPU), + XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM | WQ_UNBOUND), 1, mp->m_super->s_id); if (!mp->m_inodegc_wq) goto out_destroy_blockgc; =20 mp->m_sync_workqueue =3D alloc_workqueue("xfs-sync/%s", - XFS_WQFLAGS(WQ_FREEZABLE | WQ_PERCPU), 0, + XFS_WQFLAGS(WQ_FREEZABLE | WQ_UNBOUND), 0, mp->m_super->s_id); if (!mp->m_sync_workqueue) goto out_destroy_inodegc; @@ -2564,7 +2564,7 @@ xfs_init_workqueues(void) * AGs in all the filesystems mounted. Hence use the default large * max_active value for this workqueue. */ - xfs_alloc_wq =3D alloc_workqueue("xfsalloc", XFS_WQFLAGS(WQ_MEM_RECLAIM |= WQ_FREEZABLE | WQ_PERCPU), + xfs_alloc_wq =3D alloc_workqueue("xfsalloc", XFS_WQFLAGS(WQ_MEM_RECLAIM |= WQ_FREEZABLE | WQ_UNBOUND), 0); if (!xfs_alloc_wq) return -ENOMEM; --=20 2.52.0