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Date: Sun, 15 Aug 2010 08:25:29 +0300 From: "M. Vefa Bicakci" <bicave@...eronline.com> To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org> CC: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> Subject: [Bisected Regression in 2.6.35] A full tmpfs filesystem causes hibernationto hang Hello all, I am using Debian Sid on a Toshiba Satellite A100 laptop. After testing 2.6.35 for a while, I noticed that sometimes my hibernation attempts would fail. I should say that I never had such a problem before 2.6.35. The hibernation process hangs with 2.6.35 after printing the following: === 8< === ... Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done. PM: Preallocating image memory... === >8 === After a short investigation, I found out that this only happens when my tmpfs filesystem on /tmp had a lot of data in it. When my tmpfs is empty, I have no problems. So I wrote a short script which fills up the tmpfs on /tmp and tries to hibernate, and I bisected the kernel using this script. The end result is that the following commit causes this regression: === 8< === commit bb21c7ce18eff8e6e7877ca1d06c6db719376e3c Author: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> Date: Fri Jun 4 14:15:05 2010 -0700 vmscan: fix do_try_to_free_pages() return value when priority==0 reclaim failure ... === >8 === I have run 2.6.35-rc6, 2.6.35 and 2.6.35.1 with this commit reverted, and I am happy to say that I haven't experienced any problems for at least 17 days. It looks like this change was included with 2.6.35-rc1. I am sorry for not testing earlier. I am willing to do testing in case anyone would like me to try patches. Regards, M. Vefa Bicakci -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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