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GET /api/1.1/patches/2230856/?format=api
{ "id": 2230856, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230856/?format=api", "web_url": "http://patchwork.ozlabs.org/project/hostap/patch/CCEBE763-3CEE-4FFA-9BAC-1A395D64ACF2@amazon.com/", "project": { "id": 22, "url": "http://patchwork.ozlabs.org/api/1.1/projects/22/?format=api", "name": "HostAP Development", "link_name": "hostap", "list_id": "hostap.lists.infradead.org", "list_email": "hostap@lists.infradead.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<CCEBE763-3CEE-4FFA-9BAC-1A395D64ACF2@amazon.com>", "date": "2026-04-28T00:07:20", "name": "ctrl_iface: Allow configuring pending message queue depth", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "0d2f33b2487e7fcc307eaf9c39f4ba86cc854683", "submitter": { "id": 93286, "url": "http://patchwork.ozlabs.org/api/1.1/people/93286/?format=api", "name": "Shukla, Ashish", "email": "ashshukl@lab126.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/hostap/patch/CCEBE763-3CEE-4FFA-9BAC-1A395D64ACF2@amazon.com/mbox/", "series": [ { "id": 502217, "url": "http://patchwork.ozlabs.org/api/1.1/series/502217/?format=api", "web_url": "http://patchwork.ozlabs.org/project/hostap/list/?series=502217", "date": "2026-04-28T00:07:20", "name": "ctrl_iface: Allow configuring pending message queue depth", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502217/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230856/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230856/checks/", "tags": {}, "headers": { "Return-Path": "\n <hostap-bounces+incoming=patchwork.ozlabs.org@lists.infradead.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 secure) header.d=lists.infradead.org header.i=@lists.infradead.org\n header.a=rsa-sha256 header.s=bombadil.20210309 header.b=gpi4lDv5;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=lab126.com header.i=@lab126.com header.a=rsa-sha256\n header.s=amazoncorp2 header.b=lmyKcRU6;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=none (no SPF record) smtp.mailfrom=lists.infradead.org\n (client-ip=2607:7c80:54:3::133; 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The original\n message has been attached to this so you can view it or label\n similar future email. If you have any questions, see\n the administrator of that system for details.\n Content preview: Hi, The ctrl_iface UNIX socket implementation queues event\n messages when monitor clients cannot keep up,\n and starts dropping the oldest\n message once 2000 have accumulated. This limit is hardcoded and cann [...] \n Content analysis details: (-2.1 points, 5.0 required)\n pts rule name description\n ---- ----------------------\n --------------------------------------------------\n -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no\n trust\n [35.83.148.184 listed in list.dnswl.org]\n -0.0 SPF_PASS SPF: sender matches SPF record\n 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record\n -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from\n envelope-from domain\n -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from\n author's\n domain\n -0.1 DKIM_VALID Message has at least one valid DKIM or DK\n signature\n 0.1 DKIM_SIGNED Message has a DKIM or DK signature,\n not necessarily valid\n -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%\n [score: 0.0000]\n 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay\n lines", "X-Mailman-Approved-At": "Wed, 29 Apr 2026 23:45:04 -0700", "X-BeenThere": "hostap@lists.infradead.org", "X-Mailman-Version": "2.1.34", "Precedence": "list", "List-Id": "<hostap.lists.infradead.org>", "List-Unsubscribe": "<http://lists.infradead.org/mailman/options/hostap>,\n <mailto:hostap-request@lists.infradead.org?subject=unsubscribe>", "List-Archive": "<http://lists.infradead.org/pipermail/hostap/>", "List-Post": "<mailto:hostap@lists.infradead.org>", "List-Help": "<mailto:hostap-request@lists.infradead.org?subject=help>", "List-Subscribe": "<http://lists.infradead.org/mailman/listinfo/hostap>,\n <mailto:hostap-request@lists.infradead.org?subject=subscribe>", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "Sender": "\"Hostap\" <hostap-bounces@lists.infradead.org>", "Errors-To": "hostap-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org" }, "content": "Hi,\n\nThe ctrl_iface UNIX socket implementation queues event messages when\nmonitor clients cannot keep up, and starts dropping the oldest message\nonce 2000 have accumulated. This limit is hardcoded and cannot be\nchanged without modifying the source.\n\nOn embedded and mobile platforms (e.g., Android devices with STA + P2P\ninterfaces), each interface maintains its own queue in addition to the\nglobal queue. Each queued message allocates the struct header plus the\nfull event text inline, so the combined queues can consume several\nhundred KB before throttling takes effect.\n\nThis patch adds CONFIG_CTRL_IFACE_MSG_QUEUE_LIMIT as a build-time\noption to control the threshold. The default remains 2000 so there is\nno change in behavior for existing builds. Platforms with tighter\nmemory constraints can set a lower value in their .config (e.g., 100)\nto cap the queue earlier without any functional impact — messages that\nold are stale for monitor clients anyway.\n\nPlease review.\n\nThanks,\nAshish\n\n---\n\nctrl_iface: Allow configuring pending message queue depth\n\nThe hardcoded limit of 2000 pending ctrl_iface monitor messages may\nnot be appropriate for all platforms. Each queued message carries the\nfull event text, so the queue can consume several hundred KB per\ninterface before throttling begins.\n\nAdd CONFIG_CTRL_IFACE_MSG_QUEUE_LIMIT so that the threshold can be\ntuned at build time. The default remains 2000 for backward\ncompatibility. Embedded platforms can set a lower value to reduce peak\nmemory usage when monitor clients are slow to consume events.\n\nSigned-off-by: Ashish Shukla <ashshukl@amazon.com>\n---\n wpa_supplicant/ctrl_iface_unix.c | 6 +++++-\n wpa_supplicant/defconfig | 5 +++++\n 2 files changed, 10 insertions(+), 1 deletion(-)\n\n--\n2.34.1", "diff": "diff --git a/wpa_supplicant/ctrl_iface_unix.c b/wpa_supplicant/ctrl_iface_unix.c\r\n--- a/wpa_supplicant/ctrl_iface_unix.c\r\n+++ b/wpa_supplicant/ctrl_iface_unix.c\r\n@@ -30,6 +30,10 @@\r\n #include \"wpa_supplicant_i.h\"\r\n #include \"ctrl_iface.h\"\r\n \r\n+#ifndef CONFIG_CTRL_IFACE_MSG_QUEUE_LIMIT\r\n+#define CONFIG_CTRL_IFACE_MSG_QUEUE_LIMIT 2000\r\n+#endif\r\n+\r\n /* Per-interface ctrl_iface */\r\n \r\n struct ctrl_iface_priv {\r\n@@ -403,7 +407,7 @@ static void wpas_ctrl_msg_queue_limit(unsigned int throttle_count,\r\n {\r\n \tstruct ctrl_iface_msg *msg;\r\n \r\n-\tif (throttle_count < 2000)\r\n+\tif (throttle_count < CONFIG_CTRL_IFACE_MSG_QUEUE_LIMIT)\r\n \t\treturn;\r\n \r\n \tmsg = dl_list_first(queue, struct ctrl_iface_msg, list);\r\ndiff --git a/wpa_supplicant/defconfig b/wpa_supplicant/defconfig\r\n--- a/wpa_supplicant/defconfig\r\n+++ b/wpa_supplicant/defconfig\r\n@@ -620,3 +620,8 @@ CONFIG_MBO=y\r\n #CONFIG_DPP=y\r\n # DPP version 2 support\r\n #CONFIG_DPP2=y\r\n+\r\n+# Maximum number of pending ctrl_iface monitor messages to queue before\r\n+# dropping the oldest. Default is 2000. Embedded platforms with limited\r\n+# memory may benefit from a lower value (e.g., 100).\r\n+#CONFIG_CTRL_IFACE_MSG_QUEUE_LIMIT=2000\r\n", "prefixes": [] }