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GET /api/patches/2226629/?format=api
{ "id": 2226629, "url": "http://patchwork.ozlabs.org/api/patches/2226629/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260421071838.3878-1-charles_xu@189.cn/", "project": { "id": 46, "url": "http://patchwork.ozlabs.org/api/projects/46/?format=api", "name": "Intel Wired Ethernet development", "link_name": "intel-wired-lan", "list_id": "intel-wired-lan.osuosl.org", "list_email": "intel-wired-lan@osuosl.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260421071838.3878-1-charles_xu@189.cn>", "list_archive_url": null, "date": "2026-04-21T07:18:38", "name": "[6.6.y] i40e: Fix preempt count leak in napi poll tracepoint", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": false, "hash": "133a95ee31db351a25f110a004d524448c9cb247", "submitter": { "id": 93226, "url": "http://patchwork.ozlabs.org/api/people/93226/?format=api", "name": "Charles Xu", "email": "charles_xu@189.cn" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260421071838.3878-1-charles_xu@189.cn/mbox/", "series": [ { "id": 501047, "url": "http://patchwork.ozlabs.org/api/series/501047/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/list/?series=501047", "date": "2026-04-21T07:18:38", "name": "[6.6.y] i40e: Fix preempt count leak in napi poll tracepoint", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501047/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2226629/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2226629/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<intel-wired-lan-bounces@osuosl.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=osuosl.org header.i=@osuosl.org header.a=rsa-sha256\n header.s=default header.b=KPw5bZf2;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=osuosl.org\n (client-ip=2605:bc80:3010::136; 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envelope-from=intel-wired-lan-bounces@osuosl.org;\n receiver=<UNKNOWN> ", "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 smtp3.osuosl.org 3850960E0F", "OpenDKIM Filter v2.11.0 smtp1.osuosl.org 875D683CEC" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=osuosl.org;\n\ts=default; t=1776877338;\n\tbh=K8y1nJ5X+p53Tw+hj93PYyBGC4V7zERYLDg+mn/JilQ=;\n\th=From:To:Date:Subject:List-Id:List-Unsubscribe:List-Archive:\n\t List-Post:List-Help:List-Subscribe:From;\n\tb=KPw5bZf2em8JxGd8YhqD8dAoTflNfBE9VmM6ImxOLrJipO1I3vg4jstwmy0D9cRYJ\n\t dxwuXD0LsqFnfu1NIqyvPxe6sxd0SQZK+eHoE8AkjqqJ27PpGDGubV+PefxQdPBd9a\n\t 7wqFFDOEr/AMIUCq5uCdeI0zcRPx60NcseV8F4yLbq/hxGOlji5o40nQJx35UERUWs\n\t bRJiHjMlZyW3EVPTkqKPCIF0jNXjMh4IOOkmD2YSLtH2S1sAQmp9kGuWmUBdnEwPwK\n\t OUUWrLP5FL0zVj4hIWk+l/r1t8GT0iDLNp01CuFBzUeeMWnBzUmeSzgpPYl9k3NJfv\n\t TbHJi3PO2ZTKg==", "X-Greylist": "delayed 438 seconds by postgrey-1.37 at util1.osuosl.org;\n Tue, 21 Apr 2026 07:26:02 UTC", "DMARC-Filter": "OpenDMARC Filter v1.4.2 smtp1.osuosl.org 875D683CEC", "Received-SPF": "Pass (mailfrom) identity=mailfrom; client-ip=125.88.204.37;\n helo=mail.189.cn; envelope-from=charles_xu@189.cn; receiver=<UNKNOWN>", "HMM_SOURCE_IP": "10.158.242.145:0.1498820815", "HMM_ATTACHE_NUM": "0000", "HMM_SOURCE_TYPE": "SMTP", "X-Transaction-ID": "460328a3dd2645d881ad4c010de65c55", "X-Real-From": "charles_xu@189.cn", "X-Receive-IP": "223.104.44.125", "X-MEDUSA-Status": "0", "From": "charles_xu@189.cn", "To": "tglx@kernel.org, anthony.l.nguyen@intel.com, przemyslaw.kitszel@intel.com,\n intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org, joe@dama.to,\n aleksandr.loktionov@intel.com, stable@vger.kernel.org", "Date": "Tue, 21 Apr 2026 15:18:38 +0800", "Message-Id": "<20260421071838.3878-1-charles_xu@189.cn>", "X-Mailer": "git-send-email 2.35.3", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Mailman-Approved-At": "Wed, 22 Apr 2026 17:02:16 +0000", "X-Mailman-Original-Authentication-Results": "smtp1.osuosl.org;\n dmarc=none (p=none dis=none)\n header.from=189.cn", "Subject": "[Intel-wired-lan] [PATCH 6.6.y] i40e: Fix preempt count leak in\n napi poll tracepoint", "X-BeenThere": "intel-wired-lan@osuosl.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Intel Wired Ethernet Linux Kernel Driver Development\n <intel-wired-lan.osuosl.org>", "List-Unsubscribe": "<https://lists.osuosl.org/mailman/options/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=unsubscribe>", "List-Archive": "<http://lists.osuosl.org/pipermail/intel-wired-lan/>", "List-Post": "<mailto:intel-wired-lan@osuosl.org>", "List-Help": "<mailto:intel-wired-lan-request@osuosl.org?subject=help>", "List-Subscribe": "<https://lists.osuosl.org/mailman/listinfo/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=subscribe>", "Errors-To": "intel-wired-lan-bounces@osuosl.org", "Sender": "\"Intel-wired-lan\" <intel-wired-lan-bounces@osuosl.org>" }, "content": "From: Thomas Gleixner <tglx@kernel.org>\n\n[ Upstream commit 4b3d54a85bd37ebf2d9836f0d0de775c0ff21af9 ]\n\nUsing get_cpu() in the tracepoint assignment causes an obvious preempt\ncount leak because nothing invokes put_cpu() to undo it:\n\n softirq: huh, entered softirq 3 NET_RX with preempt_count 00000100, exited with 00000101?\n\nThis clearly has seen a lot of testing in the last 3+ years...\n\nUse smp_processor_id() instead.\n\nFixes: 6d4d584a7ea8 (\"i40e: Add i40e_napi_poll tracepoint\")\nSigned-off-by: Thomas Gleixner <tglx@kernel.org>\nCc: Tony Nguyen <anthony.l.nguyen@intel.com>\nCc: Przemek Kitszel <przemyslaw.kitszel@intel.com>\nCc: intel-wired-lan@lists.osuosl.org\nCc: netdev@vger.kernel.org\nReviewed-by: Joe Damato <joe@dama.to>\nReviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>\nSigned-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>\nSigned-off-by: Charles Xu <charles_xu@189.cn>\n---\n drivers/net/ethernet/intel/i40e/i40e_trace.h | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)", "diff": "diff --git a/drivers/net/ethernet/intel/i40e/i40e_trace.h b/drivers/net/ethernet/intel/i40e/i40e_trace.h\nindex 33b4e30f5e00..9b735a9e2114 100644\n--- a/drivers/net/ethernet/intel/i40e/i40e_trace.h\n+++ b/drivers/net/ethernet/intel/i40e/i40e_trace.h\n@@ -88,7 +88,7 @@ TRACE_EVENT(i40e_napi_poll,\n \t\t__entry->rx_clean_complete = rx_clean_complete;\n \t\t__entry->tx_clean_complete = tx_clean_complete;\n \t\t__entry->irq_num = q->irq_num;\n-\t\t__entry->curr_cpu = get_cpu();\n+\t\t__entry->curr_cpu = smp_processor_id();\n \t\t__assign_str(qname, q->name);\n \t\t__assign_str(dev_name, napi->dev ? napi->dev->name : NO_DEV);\n \t\t__assign_bitmask(irq_affinity, cpumask_bits(&q->affinity_mask),\n", "prefixes": [ "6.6.y" ] }