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GET /api/1.1/patches/2220958/?format=api
{ "id": 2220958, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2220958/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260408131216.2662245-2-aleksandr.loktionov@intel.com/", "project": { "id": 46, "url": "http://patchwork.ozlabs.org/api/1.1/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": "" }, "msgid": "<20260408131216.2662245-2-aleksandr.loktionov@intel.com>", "date": "2026-04-08T13:12:09", "name": "[iwl-next,v2,1/8] ixgbe: lower IXGBE_ITR_ADAPTIVE_MAX_USECS to prevent RX starvation", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "fff15e3fb22e41e0f2973778c5f9e5cc637e33eb", "submitter": { "id": 75597, "url": "http://patchwork.ozlabs.org/api/1.1/people/75597/?format=api", "name": "Loktionov, Aleksandr", "email": "aleksandr.loktionov@intel.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260408131216.2662245-2-aleksandr.loktionov@intel.com/mbox/", "series": [ { "id": 499140, "url": "http://patchwork.ozlabs.org/api/1.1/series/499140/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/list/?series=499140", "date": "2026-04-08T13:12:08", "name": "ixgbe: nits and improvements", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/499140/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2220958/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2220958/checks/", "tags": {}, "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=qOMPWTeU;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=osuosl.org\n (client-ip=2605:bc80:3010::137; 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envelope-from=intel-wired-lan-bounces@osuosl.org;\n receiver=<UNKNOWN> ", "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 smtp4.osuosl.org B990940ED8", "OpenDKIM Filter v2.11.0 smtp4.osuosl.org 7EECB40E9E" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=osuosl.org;\n\ts=default; t=1775653942;\n\tbh=M3hn3EpusPrBMM8sVKlNSWkI7nmf6UUew8zywfxONAs=;\n\th=From:To:Cc:Date:In-Reply-To:References:Subject:List-Id:\n\t List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe:\n\t From;\n\tb=qOMPWTeUnZlbMLM27z9ioCUjvceYyg1TxSdKhsle4fx1Su8CJ+V2x6VlH9eId2cm8\n\t cCjkAWf+/yEyDYlBY1c9+ySf0T2aBgjRMykY1WRYdkv6WyvbLsCWHgZKGqhyuuJoTW\n\t uKdyY3TTDG8vsphOupGxxKAdVdx/a6OIFMfmdZKLperNffiBBS89gRqTR7g0fwWs/x\n\t 2RpgkR/dHUPATsPmOVFSaLvgAopqZzTM66gKVyHoTanN1lFpiDhnsfUN9RnZIFk/Jo\n\t KX/JckpO0nYu/aBKqpAqlG0KCE7zAiLhVcl9SWqHljq3Fb3NG3PFCRBB0E6xCqgz6q\n\t x6mHm64IvO/EA==", "Received-SPF": "Pass (mailfrom) identity=mailfrom; client-ip=192.198.163.7;\n helo=mgamail.intel.com; envelope-from=aleksandr.loktionov@intel.com;\n receiver=<UNKNOWN>", "DMARC-Filter": "OpenDMARC Filter v1.4.2 smtp4.osuosl.org 7EECB40E9E", "X-CSE-ConnectionGUID": [ "gP/JxF91Sl+vz3FzAhbF4A==", "K44WKe62Q/Gr4G/BWdVmCA==" ], "X-CSE-MsgGUID": [ "CkqOBbovR++0DcUyStTgEA==", "LCJkLTBfQp2x7V6nq65USw==" ], "X-IronPort-AV": [ "E=McAfee;i=\"6800,10657,11752\"; a=\"102087261\"", "E=Sophos;i=\"6.23,167,1770624000\"; d=\"scan'208\";a=\"102087261\"", "E=Sophos;i=\"6.23,167,1770624000\"; d=\"scan'208\";a=\"228715057\"" ], "X-ExtLoop1": "1", "From": "Aleksandr Loktionov <aleksandr.loktionov@intel.com>", "To": "intel-wired-lan@lists.osuosl.org, anthony.l.nguyen@intel.com,\n aleksandr.loktionov@intel.com", "Cc": "netdev@vger.kernel.org", "Date": "Wed, 8 Apr 2026 15:12:09 +0200", "Message-ID": "<20260408131216.2662245-2-aleksandr.loktionov@intel.com>", "X-Mailer": "git-send-email 2.52.0", "In-Reply-To": "<20260408131216.2662245-1-aleksandr.loktionov@intel.com>", "References": "<20260408131216.2662245-1-aleksandr.loktionov@intel.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Mailman-Original-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple;\n d=intel.com; i=@intel.com; q=dns/txt; s=Intel;\n t=1775653940; x=1807189940;\n h=from:to:cc:subject:date:message-id:in-reply-to:\n references:mime-version:content-transfer-encoding;\n bh=98vFBFxoC4OfWp9o9SYGRXEL2PW2ysRQpEnIXyDvrEA=;\n b=iWXlrR0YDU+UdHQQrIrlfmq3Zh70SMbISAF/XLcUh7g2LuJSiLXObmsx\n taI4g6lys3vShol+Y8iKE1a0FGd8oq65CWRxhS0A9MTSC9/U0nwJYYAfv\n 8w448+bDe/8wdwX8I+uaP4pKC6VwkelmEJ4lCUPUPZSsfBg1HhP0t7xa1\n dzraDlBDQoExHwvcRSUN18ZIfUKfzcL2DewcuuFWFYIOSUtmr1tqQlIsB\n ajtrcBU0N2Psg0h2uJyZKTDpbZyo5T0Zs4TM6yEJrst/wJ6V2TTIfUHzf\n ihs4rapbGIcJVbmWgX+01bPvuZfWQvY/QLfQd0vmlKgMKeGEKAeb6b4Qh\n Q==;", "X-Mailman-Original-Authentication-Results": [ "smtp4.osuosl.org;\n dmarc=pass (p=none dis=none)\n header.from=intel.com", "smtp4.osuosl.org;\n dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com\n header.a=rsa-sha256 header.s=Intel header.b=iWXlrR0Y" ], "Subject": "[Intel-wired-lan] [PATCH iwl-next v2 1/8] ixgbe: lower\n IXGBE_ITR_ADAPTIVE_MAX_USECS to prevent RX starvation", "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: Alexander Duyck <alexander.h.duyck@intel.com>\n\nAt the current maximum of 126 us the minimum bulk-mode interrupt rate\nis ~7936 interrupts/s. Under sustained full-line-rate bulk RX traffic\nthis is low enough that descriptor ring starvation can occur before the\nnext interrupt fires.\n\nLower IXGBE_ITR_ADAPTIVE_MAX_USECS from 126 to 84 us. This raises the\nminimum rate to ~11905 interrupts/s (~12K ints/s), providing enough\nheadroom to drain the ring before it wraps.\n\nSigned-off-by: Alexander Duyck <alexander.h.duyck@intel.com>\nSigned-off-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>\n---\nv1 -> v2:\n - Split from monolithic ITR cleanup patch; this patch only lowers\n IXGBE_ITR_ADAPTIVE_MAX_USECS from 126 to 84.\n\n drivers/net/ethernet/intel/ixgbe/ixgbe.h | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)", "diff": "diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h\nindex 59a1cee4..b3f4d21 100644\n--- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h\n+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h\n@@ -473,6 +473,6 @@ static inline unsigned int ixgbe_rx_pg_order(struct ixgbe_ring *ring)\n \n #define IXGBE_ITR_ADAPTIVE_MIN_INC\t2\n #define IXGBE_ITR_ADAPTIVE_MIN_USECS\t10\n-#define IXGBE_ITR_ADAPTIVE_MAX_USECS\t126\n+#define IXGBE_ITR_ADAPTIVE_MAX_USECS\t84\n #define IXGBE_ITR_ADAPTIVE_LATENCY\t0x80\n #define IXGBE_ITR_ADAPTIVE_BULK\t\t0x00\n", "prefixes": [ "iwl-next", "v2", "1/8" ] }