Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/patches/2197765/?format=api
{ "id": 2197765, "url": "http://patchwork.ozlabs.org/api/patches/2197765/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260218132633.29748-24-hreitz@redhat.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260218132633.29748-24-hreitz@redhat.com>", "list_archive_url": null, "date": "2026-02-18T13:26:32", "name": "[v4,23/24] qapi/block-export: Document FUSE's multi-threading", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "3cf34662520b3900a8682852dc478d297f7ef79b", "submitter": { "id": 82279, "url": "http://patchwork.ozlabs.org/api/people/82279/?format=api", "name": "Hanna Czenczek", "email": "hreitz@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260218132633.29748-24-hreitz@redhat.com/mbox/", "series": [ { "id": 492547, "url": "http://patchwork.ozlabs.org/api/series/492547/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=492547", "date": "2026-02-18T13:26:09", "name": "export/fuse: Use coroutines and multi-threading", "version": 4, "mbox": "http://patchwork.ozlabs.org/series/492547/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2197765/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2197765/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=Kl8V4gA4;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=google header.b=gGiBSUPa;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fGHc640Yzz1xpY\n\tfor <incoming@patchwork.ozlabs.org>; Thu, 19 Feb 2026 00:36:54 +1100 (AEDT)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1vshgc-0005E4-AG; Wed, 18 Feb 2026 08:33:50 -0500", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <hreitz@redhat.com>) id 1vshft-0004U7-ND\n for qemu-devel@nongnu.org; Wed, 18 Feb 2026 08:33:06 -0500", "from us-smtp-delivery-124.mimecast.com ([170.10.133.124])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <hreitz@redhat.com>) id 1vshfq-0006H5-QB\n for qemu-devel@nongnu.org; Wed, 18 Feb 2026 08:33:05 -0500", "from mail-wr1-f72.google.com (mail-wr1-f72.google.com\n [209.85.221.72]) by relay.mimecast.com with ESMTP with STARTTLS\n (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id\n us-mta-624-WXunfzg6M0C4f8zHL_79rg-1; Wed, 18 Feb 2026 08:27:43 -0500", "by mail-wr1-f72.google.com with SMTP id\n ffacd0b85a97d-435a11575ecso5278815f8f.2\n for <qemu-devel@nongnu.org>; Wed, 18 Feb 2026 05:27:42 -0800 (PST)", "from localhost\n (p200300cfd737d029edef7b8da7441ac2.dip0.t-ipconnect.de.\n [2003:cf:d737:d029:edef:7b8d:a744:1ac2])\n by smtp.gmail.com with ESMTPSA id\n 5b1f17b1804b1-4836cd7af87sm461122755e9.1.2026.02.18.05.27.39\n (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n Wed, 18 Feb 2026 05:27:40 -0800 (PST)" ], "DKIM-Signature": [ "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1771421582;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:cc:mime-version:mime-version:content-type:content-type:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=/nvY+FQXOEd7mADtviTKG5X4XDtAjCV+MockVMSjqaI=;\n b=Kl8V4gA4OjTWa6G4kTPK+SqYhkRyTouhOwW6L30X17eOaVKxYtcmLMQBq66fwyWIQ8nWtd\n t9HYGcEFQlEnWBwPwCBnDlUfvojCBAOAX5zFOswvHIKnw2sFD/NRw1ulVhpwfm4cAKtxsD\n Ph2ssED9FiySQo5H6mHUk4SRd4uY7yY=", "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=redhat.com; s=google; t=1771421262; x=1772026062; darn=nongnu.org;\n h=content-transfer-encoding:mime-version:references:in-reply-to\n :message-id:date:subject:cc:to:from:from:to:cc:subject:date\n :message-id:reply-to;\n bh=/nvY+FQXOEd7mADtviTKG5X4XDtAjCV+MockVMSjqaI=;\n b=gGiBSUPaOBLnNRkKy3NlbR+893KG9NguU5f5bN5JNdyIfYFbfZno4ZLQB+p0rWOXII\n WHXg1DcRXilDykCDs4uBkLfRPotKR3dnl/0I8XNM/NNl6RMRZrhdeseYhOaHnZ71szd1\n tI9l602TkAinBUCS33fAjUetGcFLubVBFAAltD0xOok74qbv6imckGBHyguaL0ST9xjp\n EA5aaTGLykwsa2IOAA727sRTrRPeXNUQ6bdRym14zu0qojTCU8vrvGK3ffYuso6XFwxd\n 6WFUtE30kPdsqyHcXs9DieeYOUZrH6AJy2x5kjhz4P93Cj+Ts86p3wZzEqJ2A3vWqHpU\n ipPg==" ], "X-MC-Unique": "WXunfzg6M0C4f8zHL_79rg-1", "X-Mimecast-MFC-AGG-ID": "WXunfzg6M0C4f8zHL_79rg_1771421262", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20230601; t=1771421262; x=1772026062;\n h=content-transfer-encoding:mime-version:references:in-reply-to\n :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from\n :to:cc:subject:date:message-id:reply-to;\n bh=/nvY+FQXOEd7mADtviTKG5X4XDtAjCV+MockVMSjqaI=;\n b=kh1cG5qONPAvgk7yQu1dAzX62SY75F+EQy8UPwJYLmgZVYKXRMdE+w5LApVY1YQFAf\n MXd26B7hu/DNQkDbOmVPJbrYi3ByrSYzN3Qx0vQnmpgqasQRvCY2xerSrOf6ZB+jDEOd\n C2WgTdMc+Wtu8LdbEcJMFsxXlASrATg8VfAR62RP6DwxfwMtxuUip/KhSSq7SWJUtwDy\n 5UBemodAH3VONGfkml6bRsqrBGKa+4xND53EbQJHrr605aUQvRaYE+j6taGbuFiV94j9\n QxB7kyzoVK7npbpPF2YZpXLgoVKZYC+gWjExw0pBYi7sOqkcomkBH7nzRbYMfEcZ2pQS\n 9+vg==", "X-Gm-Message-State": "AOJu0YyjKkIk+pJYYCm6bbRNj83i+zFLoFLCYGYdBpDo9kgRZ/MxSXcs\n 78Q3W7Rpr2bRevQtnBauFD5Ny8jc22aABPeF9HdAlsw3tyRYJRSfTBaPNlbkfCOfSD/zNcDK0zT\n DzjYxZT/Y/JOoWivMd3YP64aSGu96vreldzTN998oMF4TQryare/YJ7aI", "X-Gm-Gg": "AZuq6aLd6GB8O1Ezw1aDeeoAfTeGUU2/3/aZ/KcIiNbxTHO9/MlSgbL5oxoCoJF59h4\n JuRrk9mTbIcg5YC9dsBq7YEHonWGlozCMtlhwquotZmSKTeKwbrJG7Hw43Tvl9EefUKcGtwPOlh\n xKXpY2bZZuSPX1O4gMVEogAxBYB3yA6yBoBEqk4NxtiPtfhgqZMU84jTQmedgVsEZn5dh5qEx+k\n 8HawRaY5BvdLPGKnSwKgmGgAtKHgdEA99ngsFFHvC0h95qm2KLGexog0kr6o4+/iW3mJwXrvmw+\n C32fxg+s9iLZQpzQBMoa1ielNUaqjUesGzvZNm1Ulv4SdkmK/+SsJpzp1WW/seS+BvC+VPzbUQ0\n ZsTc3PngOirLeiedJNRcwsEnpiIWoKA0m9O+EuSiQU5lU/B0KbmmwWzYl64QJ6CG7e5HQA0c79E\n x9/AsS", "X-Received": [ "by 2002:a5d:584d:0:b0:437:8f37:887 with SMTP id\n ffacd0b85a97d-43958e40404mr3159047f8f.36.1771421261774;\n Wed, 18 Feb 2026 05:27:41 -0800 (PST)", "by 2002:a5d:584d:0:b0:437:8f37:887 with SMTP id\n ffacd0b85a97d-43958e40404mr3158983f8f.36.1771421261190;\n Wed, 18 Feb 2026 05:27:41 -0800 (PST)" ], "From": "Hanna Czenczek <hreitz@redhat.com>", "To": "qemu-block@nongnu.org", "Cc": "qemu-devel@nongnu.org, Hanna Czenczek <hreitz@redhat.com>,\n Kevin Wolf <kwolf@redhat.com>, Brian Song <hibriansong@gmail.com>", "Subject": "[PATCH v4 23/24] qapi/block-export: Document FUSE's multi-threading", "Date": "Wed, 18 Feb 2026 14:26:32 +0100", "Message-ID": "<20260218132633.29748-24-hreitz@redhat.com>", "X-Mailer": "git-send-email 2.53.0", "In-Reply-To": "<20260218132633.29748-1-hreitz@redhat.com>", "References": "<20260218132633.29748-1-hreitz@redhat.com>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=170.10.133.124; envelope-from=hreitz@redhat.com;\n helo=us-smtp-delivery-124.mimecast.com", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.043,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001,\n SPF_HELO_PASS=-0.001,\n SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no", "X-Spam_action": "no action", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "Document for users that FUSE's multi-threading implementation\ndistributes requests in a round-robin manner, regardless of where they\noriginate from.\n\nAs noted by Stefan, this will probably change with a FUSE-over-io_uring\nimplementation (which is supposed to have CPU affinity), but documenting\nthat is left for once that is done.\n\nSuggested-by: Stefan Hajnoczi <stefanha@redhat.com>\nAcked-by: Markus Armbruster <armbru@redhat.com>\nSigned-off-by: Hanna Czenczek <hreitz@redhat.com>\n---\n qapi/block-export.json | 5 +++++\n 1 file changed, 5 insertions(+)", "diff": "diff --git a/qapi/block-export.json b/qapi/block-export.json\nindex 160cd2e3ca..dd724acf1c 100644\n--- a/qapi/block-export.json\n+++ b/qapi/block-export.json\n@@ -164,6 +164,11 @@\n # Options for exporting a block graph node on some (file) mountpoint\n # as a raw image.\n #\n+# Multi-threading note: The FUSE export supports multi-threading.\n+# Currently, requests are distributed across these threads in a\n+# round-robin fashion, i.e. independently of the CPU core from which a\n+# request originates.\n+#\n # @mountpoint: Path on which to export the block device via FUSE.\n # This must point to an existing regular file.\n #\n", "prefixes": [ "v4", "23/24" ] }