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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A0207CD98E6 for ; Fri, 19 Jun 2026 05:01:21 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4ghQRM69Xnz3bpm; Fri, 19 Jun 2026 15:01:19 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip="2607:7c80:54:3::133" ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1781845279; cv=none; b=RBDKWUPz9Z6OTouyIRkllClK+eBIlKuiMG3YePpe0SmgS96CJ6nVsZAIkaxV1n3SJDBPHu9Gscl/+XfhTtsVPutsjEUldzIkusIGuWPHcmME/JKaTePKJdF3GoSfGRXHcExS/xu4qiQM2dclwJl0ZkPJGP/sbnmONXNCNxQySZvkjQN/JD0kGLiIHvVvNzGSULQ+hYX2RnAmMuRk+qUvqHe0zEK1btmnibrGtg+TsFfXmdju0CJg4IzquWkk9VRhUe09Jl6v/hHt4Bc9Cyor++zJsNRsPOBHRBlaHG/JZIiR6hrCYejpMsyx2K69iKdhKGurNOE85FTPe2dExeKPJA== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1781845279; c=relaxed/relaxed; bh=3RTdskEA4tzXBpUPTIzVtRb3u/Fp36An/J4SqIF2JFo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Mg5RpKLmkgEMEyO3csSjjSs+X3lgzR5s78qLke7mgrzYLXGGVbAVra5/IzsE9PGGRtFXi6jtZpWwZZyQmp7p/2sFY7ERCRERNrHrt/Eo3UYrdLuV31VSQToTGkVk1p1unGTqylDZTScHCunKzJZ7QeGzqPGGyjOf58teVQEKfwTH9incLQW8VHZBRbJvO2zP8n9LcPnMyNI1zEAXZmSXt8xnrLZRKrosbAqG/uKJ+I5tBHp8IQ2jxQtEWhg02IbhZEFCcVWkGQOpJnmywGXRAwEsgCsh0ZyMjl/1+7H1goFiWf8oCupb7wJzb6PBve7YTlfxbCnmCXmgLFHzsUYElQ== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=fail (p=none dis=none) header.from=lst.de; dkim=pass (2048-bit key; secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=KBxf7AR7; dkim-atps=neutral; spf=none (client-ip=2607:7c80:54:3::133; helo=bombadil.infradead.org; envelope-from=batv+9d9d02d532328e2be671+8335+infradead.org+hch@bombadil.srs.infradead.org; receiver=lists.ozlabs.org) smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: lists.ozlabs.org; dmarc=fail (p=none dis=none) header.from=lst.de Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=KBxf7AR7; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=bombadil.srs.infradead.org (client-ip=2607:7c80:54:3::133; helo=bombadil.infradead.org; envelope-from=batv+9d9d02d532328e2be671+8335+infradead.org+hch@bombadil.srs.infradead.org; receiver=lists.ozlabs.org) Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4ghQRK5nrvz2ySW for ; Fri, 19 Jun 2026 15:01:14 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:In-Reply-To:References; bh=3RTdskEA4tzXBpUPTIzVtRb3u/Fp36An/J4SqIF2JFo=; b=KBxf7AR7O9I/8vH/No1JC1CG+F XnkEev87+xTe+fGLXth4ggbMJV/yvapF7rSHBRYXnd2BOQhAVnOheex6E7SxmQ20oFhmX3245LsFe deE2nuD06R4QMKWmEa+YfojzSKpZa9xagOyxoP8i7+JU4n4vzkzjhp50eAJvk3mDBrb7a00cTrlXG 6VG4JaecJnqKsruepYFvmnwTd5M8Qy0RSp510WWRLVpCoStZ+tvlUVKSQyn8od96vNr+pXMJl/S38 Ld0qO8GCucUPZMQJtG8KAwvKOCVIE+FpOBO6lyGilTGefQ+d+NmBIb/GMgOzjiumnJEbQaetjTfJd 01DiwEOQ==; Received: from 2a02-8389-2341-5b80-decc-1a96-daaa-a2cc.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:decc:1a96:daaa:a2cc] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.99.1 #2 (Red Hat Linux)) id 1waRLr-00000001zi3-0VdP; Fri, 19 Jun 2026 05:01:11 +0000 From: Christoph Hellwig To: Christian Brauner , "Darrick J. Wong" Cc: Kelu Ye , Yifan Zhao , Ritesh Harjani , Joanne Koong , linux-erofs@lists.ozlabs.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: don't build bios/contexts over multiple iomaps Date: Fri, 19 Jun 2026 07:00:52 +0200 Message-ID: <20260619050105.439956-1-hch@lst.de> X-Mailer: git-send-email 2.53.0 X-Mailing-List: linux-erofs@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Hi all, this patch changes how iomap submits bios for reads. The old behavior to build up bios across iomap was already considered problematic for a while, but we now ran into a erofs bug because of it, so it's time to finally fix it.