From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Chua Subject: Re: [PATCH 0/11] ACPI: Fixes and cleanups related to iomaps management Date: Mon, 24 Jan 2011 09:13:30 +0800 Message-ID: References: <201101201226.41021.rjw@sisk.pl> <201101222012.14028.rjw@sisk.pl> <201101232128.03007.rjw@sisk.pl> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <201101232128.03007.rjw@sisk.pl> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.linux-foundation.org Errors-To: linux-pm-bounces@lists.linux-foundation.org To: "Rafael J. Wysocki" Cc: ACPI Devel Maling List , Linux-pm mailing list , LKML List-Id: linux-pm@vger.kernel.org On Mon, Jan 24, 2011 at 4:28 AM, Rafael J. Wysocki wrote: > On Sunday, January 23, 2011, Jeff Chua wrote: >> On Sun, Jan 23, 2011 at 3:12 AM, Rafael J. Wysocki wrote: >> > On Saturday, January 22, 2011, Jeff Chua wrote: >> >> 2011/1/22 Rafael J. Wysocki : >> >> > On Saturday, January 22, 2011, Jeff Chua wrote: >> Strange. If I didn't offline, it hanged during suspend even without >> thinkpad_acpi. I could see that the suspend code does the offline >> automatically, but executing the offline before calling suspend makes >> it no hanging. > > That means there's a problem in the CPU hotplug code that manifests itslef > during suspend. =A0Is this 100% reproducible? =A0Did it happen with 2.6.3= 7? Quite reproducible. Once "something" trigger the hang, no matter how I reset the system, it'll still hang at suspend. And at other times, it just worked. I tried many things, but it seems if I go back to use an earlier version (2.6.37 works perfectly for suspend-to-disk/mem), then switched back to the newer broken version, it'll work for a few cycles before hanging at suspend-to-disk. I guess it could be CPU hotplug, and may be that thinkpad-acpi is triggering the broken cpu hotplug to fail. Jeff