From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0AF981E7C34 for ; Mon, 21 Oct 2024 14:46:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729521962; cv=none; b=egPC5pl+5lWFy0dDrdGmJYj7O/sJaHvwS+HTdhnsjRrVKa2EbN7nFg/szypL1Hx+qXtndDtlOD8EX0xfmuyB60zwVpTegPqti3xRo8GO5HPOVqdlHIgMEI31foye4A4KkzOWhCPOA1hP7nON2NJDv3thYkemSpK/i4PoaHDv6cE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729521962; c=relaxed/simple; bh=MlfWX4tqpaCWzQbuTo9owf+BHcmgyI86ZvsjuJjKESw=; h=From:In-Reply-To:References:To:Cc:Subject:MIME-Version: Content-Type:Date:Message-ID; b=i2nwYmpx0RmIySBEnWrjirZaqe2Dm82onX5X1alXEjypjBzyAP9sAaRdbWH7ppnD5qgRwdgfENSauKsWhA4O2yVG/c4m5RaLl8YFY/MQ3IgvEvu8SVzXRTl+zn9HLAJ4KBKC1O946/uLPnw4lNtrly5wQwAQeB/z/XnhadjywOk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=ehTK5qga; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ehTK5qga" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1729521959; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=ZF/W6huHYmJAWgOtJhZ3UzfsAIEzi9eYFD/euXGD1Qk=; b=ehTK5qgarTCzHjXvLUou/F18ZqfLZ0r545SWe2PlvP2wx4Ga17HFQ0Vvc7SfNhUeByQ/l3 0DjfzLs1JYvkFqFepWsBxW6bibIj+y2JkL2AvcrcdjWd+tJVYZdaGvzs19LTZZ1iFVITGm 9uXnzD7bBORJtdPbHgHmLYcMMl4IQ9k= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-369-G7bERathNQCOvlq-b9um2Q-1; Mon, 21 Oct 2024 10:45:56 -0400 X-MC-Unique: G7bERathNQCOvlq-b9um2Q-1 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (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 mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 7093A1955F41; Mon, 21 Oct 2024 14:45:54 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.42.28.218]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id E959B1955E83; Mon, 21 Oct 2024 14:45:51 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: References: To: Antony Antony Cc: dhowells@redhat.com, Sedat Dilek , Maximilian Bosch , Linux regressions mailing list , LKML , linux-fsdevel@vger.kernel.org, Christian Brauner Subject: Re: [REGRESSION] 9pfs issues on 6.12-rc1 Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <2171404.1729521950.1@warthog.procyon.org.uk> Date: Mon, 21 Oct 2024 15:45:50 +0100 Message-ID: <2171405.1729521950@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Can you tell me what parameters you're mounting 9p with? Looking at the backtrace: [ 32.390878] bad_page+0x70/0x110 [ 32.391056] free_unref_page+0x363/0x4f0 [ 32.391257] p9_release_pages+0x41/0x90 [9pnet] [ 32.391627] p9_virtio_zc_request+0x3d4/0x720 [9pnet_virtio] [ 32.391896] ? p9pdu_finalize+0x32/0xa0 [9pnet] [ 32.392153] p9_client_zc_rpc.constprop.0+0x102/0x310 [9pnet] [ 32.392447] ? kmem_cache_free+0x36/0x370 [ 32.392703] p9_client_read_once+0x1a6/0x310 [9pnet] [ 32.392992] p9_client_read+0x56/0x80 [9pnet] [ 32.393238] v9fs_issue_read+0x50/0xd0 [9p] [ 32.393467] netfs_read_to_pagecache+0x20c/0x480 [netfs] [ 32.393832] netfs_readahead+0x225/0x330 [netfs] [ 32.394154] read_pages+0x6a/0x250 it's using buffered I/O, but when I try and use 9p from qemu, it wants to use unbuffered/direct I/O. David