Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/patches/2227507/?format=api
{ "id": 2227507, "url": "http://patchwork.ozlabs.org/api/patches/2227507/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260423195918.661299-2-jhkim@linux.ibm.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": "<20260423195918.661299-2-jhkim@linux.ibm.com>", "list_archive_url": null, "date": "2026-04-23T19:59:16", "name": "[v5,1/3] aio-poll: avoid unnecessary polling time computation", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "e1a43bd44d6e67dce16bf780ce33eb2333a9330d", "submitter": { "id": 91012, "url": "http://patchwork.ozlabs.org/api/people/91012/?format=api", "name": "Jaehoon Kim", "email": "jhkim@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260423195918.661299-2-jhkim@linux.ibm.com/mbox/", "series": [ { "id": 501240, "url": "http://patchwork.ozlabs.org/api/series/501240/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501240", "date": "2026-04-23T19:59:15", "name": "improve aio-polling efficiency", "version": 5, "mbox": "http://patchwork.ozlabs.org/series/501240/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2227507/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2227507/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 (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=B1KzdpI+;\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=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists1p.gnu.org (lists1p.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 4g1n566fGYz1y2d\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 24 Apr 2026 06:00:26 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wG0D0-0001QS-UX; Thu, 23 Apr 2026 15:59:35 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <jhkim@linux.ibm.com>)\n id 1wG0Cy-0001Oe-EB; Thu, 23 Apr 2026 15:59:32 -0400", "from mx0a-001b2d01.pphosted.com ([148.163.156.1])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <jhkim@linux.ibm.com>)\n id 1wG0Cw-0003KE-DE; Thu, 23 Apr 2026 15:59:32 -0400", "from pps.filterd (m0353729.ppops.net [127.0.0.1])\n by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id\n 63NJJmmo3291901; Thu, 23 Apr 2026 19:59:26 GMT", "from ppma11.dal12v.mail.ibm.com\n (db.9e.1632.ip4.static.sl-reverse.com [50.22.158.219])\n by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4dphfrhytd-1\n (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT);\n Thu, 23 Apr 2026 19:59:26 +0000 (GMT)", "from pps.filterd (ppma11.dal12v.mail.ibm.com [127.0.0.1])\n by ppma11.dal12v.mail.ibm.com (8.18.1.7/8.18.1.7) with ESMTP id\n 63NJoU5s015642;\n Thu, 23 Apr 2026 19:59:25 GMT", "from smtprelay06.wdc07v.mail.ibm.com ([172.16.1.73])\n by ppma11.dal12v.mail.ibm.com (PPS) with ESMTPS id 4dpjky044e-1\n (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT);\n Thu, 23 Apr 2026 19:59:25 +0000 (GMT)", "from smtpav04.dal12v.mail.ibm.com (smtpav04.dal12v.mail.ibm.com\n [10.241.53.103])\n by smtprelay06.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id\n 63NJxNaP18481708\n (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK);\n Thu, 23 Apr 2026 19:59:24 GMT", "from smtpav04.dal12v.mail.ibm.com (unknown [127.0.0.1])\n by IMSVA (Postfix) with ESMTP id D4FBE5805E;\n Thu, 23 Apr 2026 19:59:23 +0000 (GMT)", "from smtpav04.dal12v.mail.ibm.com (unknown [127.0.0.1])\n by IMSVA (Postfix) with ESMTP id 9946458052;\n Thu, 23 Apr 2026 19:59:23 +0000 (GMT)", "from IBM-GLTZVH3.ibm.com (unknown [9.61.254.253])\n by smtpav04.dal12v.mail.ibm.com (Postfix) with ESMTP;\n Thu, 23 Apr 2026 19:59:23 +0000 (GMT)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc\n :content-transfer-encoding:date:from:in-reply-to:message-id\n :mime-version:references:subject:to; s=pp1; bh=GOJ5PtGfRw9JuVE9Z\n GBFN43Vs8zqFtSfYXt6iC8HpHU=; b=B1KzdpI+60zY7Tq7Uext4nV33584ZGGoQ\n MPGnxwEu4CdQ9h+sDC2ObwKLGyp6pkg21QxjgV/Q5jHrFZ0Mm9f6J4diTaHVGL03\n UwmHMzJ83KmlknzDtp71MSzhvsZgtaw2vyAzIzwMveCwByLF8hLmr37meMCRa5as\n mtjU0uDpEiDvLgMFKwIRPl8SRKsfpItqDzhmOQ/hXA1FS5DpC2GxZMakOpp+7JWm\n Upsb078LDgGsbXqmJz5fvChmQ+gdIW07rMhsJEmaXFioGr3Oo7X/KBhTpBDwV7OA\n Mdc/EFG7ko13mEoYPzTssQlJhlQv0fjh2PImdEuF4nq80/YHVAYDg==", "From": "Jaehoon Kim <jhkim@linux.ibm.com>", "To": "qemu-devel@nongnu.org, qemu-block@nongnu.org", "Cc": "pbonzini@redhat.com, stefanha@redhat.com, fam@euphon.net,\n armbru@redhat.com, eblake@redhat.com, berrange@redhat.com,\n eduardo@habkost.net, dave@treblig.org, sw@weilnetz.de,\n mjrosato@linux.ibm.com, farman@linux.ibm.com,\n Jaehoon Kim <jhkim@linux.ibm.com>", "Subject": "[PATCH v5 1/3] aio-poll: avoid unnecessary polling time computation", "Date": "Thu, 23 Apr 2026 14:59:16 -0500", "Message-ID": "<20260423195918.661299-2-jhkim@linux.ibm.com>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<20260423195918.661299-1-jhkim@linux.ibm.com>", "References": "<20260423195918.661299-1-jhkim@linux.ibm.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-TM-AS-GCONF": "00", "X-Proofpoint-GUID": "08UOR9h6keNbwrCNn9yxwKWAHAO87SGT", "X-Proofpoint-ORIG-GUID": "08UOR9h6keNbwrCNn9yxwKWAHAO87SGT", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDIzMDE5MyBTYWx0ZWRfXyAE8cS0mLOBE\n 7tXta98eT2/jZDWFjBerCObpHqbeu6iZ99h3uvYpzorgCoaOyFbzCDEJmTGYdhdPh07SL4pYV39\n FwW3RvJHdC+ArkC/G9KZURjEMN/mIlu6SPKPYsNplcryuxoSKmA8InsMeNN5TynBhRajxHNBuNI\n eWH5yZbi5WQRtRpLC+JoO+Qw+1T30ys5js7aCVO6R+GLqZJDPUOLhJeB84iLFgMGwFzM19M2XK2\n BM/aInbw69hTIMLSDGepkthQhiPk8DBhLHLdgJKEasCKZ6lq9GKMP6/G1CnnT2r+j+mECLfAH02\n mNRmmHV+e0JVDMVbp0MgGc7k4u9eV2WOI9cD+11AIfOnrV5gw6+m8Vo1lxwWwsH3TRKKjsrQo/e\n Jdp38Q/tdBpCR02aZTcT0AklYmkTprRMtewLzDt1BM3r0rD+tjcgjp76/UaIxafaWIoJPImJgJh\n 4Oyw0iVQpdkJhGGO7hQ==", "X-Authority-Analysis": "v=2.4 cv=SJxykuvH c=1 sm=1 tr=0 ts=69ea7a1e cx=c_pps\n a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17\n a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=20KFwNOVAAAA:8\n a=6MqEkq6nHlEWUoCmaegA:9", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-23_03,2026-04-21_02,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n priorityscore=1501 suspectscore=0 malwarescore=0 impostorscore=0 bulkscore=0\n lowpriorityscore=0 phishscore=0 clxscore=1015 adultscore=0 spamscore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2604230193", "Received-SPF": "pass client-ip=148.163.156.1; envelope-from=jhkim@linux.ibm.com;\n helo=mx0a-001b2d01.pphosted.com", "X-Spam_score_int": "-26", "X-Spam_score": "-2.7", "X-Spam_bar": "--", "X-Spam_report": "(-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7,\n RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=ham 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": "Nodes are no longer added to poll_aio_handlers when adaptive polling is\ndisabled, preventing unnecessary try_poll_mode() calls. This avoids\niterating over all nodes to compute max_ns unnecessarily when polling\nis disabled.\n\nSigned-off-by: Jaehoon Kim <jhkim@linux.ibm.com>\nReviewed-by: Stefan Hajnoczi <stefanha@redhat.com>\n---\n util/aio-posix.c | 11 ++++++-----\n 1 file changed, 6 insertions(+), 5 deletions(-)", "diff": "diff --git a/util/aio-posix.c b/util/aio-posix.c\nindex 488d964611..351847c6fb 100644\n--- a/util/aio-posix.c\n+++ b/util/aio-posix.c\n@@ -307,9 +307,8 @@ static bool aio_dispatch_handler(AioContext *ctx, AioHandler *node)\n * fdmon_supports_polling(), but only until the fd fires for the first\n * time.\n */\n- if (!QLIST_IS_INSERTED(node, node_deleted) &&\n- !QLIST_IS_INSERTED(node, node_poll) &&\n- node->io_poll) {\n+ if (ctx->poll_max_ns && !QLIST_IS_INSERTED(node, node_deleted) &&\n+ !QLIST_IS_INSERTED(node, node_poll) && node->io_poll) {\n trace_poll_add(ctx, node, node->pfd.fd, revents);\n if (ctx->poll_started && node->io_poll_begin) {\n node->io_poll_begin(node->opaque);\n@@ -631,7 +630,7 @@ static void adjust_polling_time(AioContext *ctx, AioPolledEvent *poll,\n bool aio_poll(AioContext *ctx, bool blocking)\n {\n AioHandlerList ready_list = QLIST_HEAD_INITIALIZER(ready_list);\n- bool progress;\n+ bool progress = false;\n bool use_notify_me;\n int64_t timeout;\n int64_t start = 0;\n@@ -656,7 +655,9 @@ bool aio_poll(AioContext *ctx, bool blocking)\n }\n \n timeout = blocking ? aio_compute_timeout(ctx) : 0;\n- progress = try_poll_mode(ctx, &ready_list, &timeout);\n+ if (ctx->poll_max_ns != 0) {\n+ progress = try_poll_mode(ctx, &ready_list, &timeout);\n+ }\n assert(!(timeout && progress));\n \n /*\n", "prefixes": [ "v5", "1/3" ] }