From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kenji Kaneshige Date: Wed, 07 Nov 2007 09:46:01 +0000 Subject: Re: [PATCH 1/9] ia64: VIRT_CPU_ACCOUNTING (accurate cpu time accounting) Message-Id: <47318959.2080306@jp.fujitsu.com> List-Id: References: <4714BDC7.1070702@jp.fujitsu.com> In-Reply-To: <4714BDC7.1070702@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org > I did run the kernel some more today and noticed some odd "hangs". > Some processes seemed to get stuck for many seconds and then > continued again. Didn't have time to try and track what was > happening. Have you seem snything like this? > I've encountered the similar phenomenon several times. I have not investigated it very much, but I guess it is related to the problem reported at http://marc.info/?l=linux-kernel&m9303432628668&w=2 The 'wa' field of 'top' command showed that one of cpus is under 100% iowait when I encountered the problem. Thanks, Kenji Kaneshige