From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp134-25.sina.com.cn (smtp134-25.sina.com.cn [180.149.134.25]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 075FF1A8F6D for ; Mon, 23 Dec 2024 12:52:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=180.149.134.25 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734958380; cv=none; b=DX+XM6vcG/k3YAwlxEGXS/etfI8aI3Z+nUMITfRwci9BeDRE4t7Pxt8dQUrxBsKcY1S0UGnAK6NGjJ83RxP3u/oWV0AddOVxrQ7/NxHOcUqrVLFfiGmm3UX0Gmn5p+A0/WRD9Xx3Vl2rGrVCrs7rUl/SbUR/P3M4r+1COQVkxfQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734958380; c=relaxed/simple; bh=+lyp4UQDRDQP7+DmXRHCPUjCIIbOveEyAjBAv4bCHko=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GNH1CB+ocu/pk485MyjEz8WY6XeQOg1vHhy3RPEZrbOOQtqls6nJ7IhAQigBG7CNR7wNOCukCeWoceqwTXtcCL2dJPssK2SN8fY6Ih9RU3UUMGPu/f1bcHym4Ob0I9gT2OJNvnuESiaI6eF7HRKnAZX8ZsYyIsrsJHDMiCOIOiY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; arc=none smtp.client-ip=180.149.134.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([113.118.65.169]) by sina.com (10.185.250.21) with ESMTP id 67695CF400005560; Mon, 23 Dec 2024 20:52:08 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=hdanton@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=hdanton@sina.com X-SMAIL-MID: 5024253408471 X-SMAIL-UIID: 053435BC8EBF45F3A50988A9A47D5DE2-20241223-205208-1 From: Hillf Danton To: imran.f.khan@oracle.com Cc: Thomas Gleixner , Tejun Heo , john.stultz@linaro.org, sboyd@kernel.org, linux-kernel@vger.kernel.org Subject: Re: Query about timer wheel API Date: Mon, 23 Dec 2024 20:51:34 +0800 Message-ID: <20241223125202.407-1-hdanton@sina.com> In-Reply-To: <0a83e9e1-3e85-4c33-bec8-6b60e6216bd8@oracle.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Mon, 23 Dec 2024 11:14:21 +1100 imran.f.khan@oracle.com > > Recently we have come across some bugs in the RDS code, where a delayed > work was being queued on an offlined CPU and as a result of that the Such a queue could not happen given irq disabled in queue_delayed_work_on(). Did you see it upstream? > underlying timer was not firing, which in turn meant that the work was > never able to make it to the intended worker_pool.