On Sun, 12 Aug 2007, Andrew Morton wrote: > On Sun, 12 Aug 2007 14:20:46 +0300 (EEST) "Ilpo Järvinen" <ilpo.jarvinen@xxxxxxxxxxx> wrote: > > On Sun, 12 Aug 2007, Andrew Morton wrote: > > > On Sat, 11 Aug 2007 15:39:30 +0300 (EEST) "Ilpo Järvinen" <ilpo.jarvinen@xxxxxxxxxxx> wrote: > > > > > > > I noticed that v2.6.23-rc1 locks up during boot, same thing happens now > > > > with the latest linus' tree (+net-2.6.24 and tcp-2.6 tree stuff on top > > > > of it; in -rc1 test they weren't though). The exact location of hang > > > > varies a bit though. No OOPS, does not respond to sysrq or anything else > > > > besides reset. Last known bootable one is something like 2.6.22-rc4 > > > > (I usually run 2.6.21.5 on this machine, haven't tried any 2.6.22 on > > > > this after those rcs). Problem seems to start after this line: > > > > > > > > Time: acpi_pm clocksource has been installed. > > > > > > > > ...the power led starts blinking (not periodic cycle but more or less > > > > varying on-off cycle, never seen that led blink before at all, didn't know > > > > that one can make it blink :-)) and the machine gets consideably slower > > > > too. Never have it been able to complete booting all they way up to login > > > > prompt before lock up. > > > > > > > > Tried with acpi=off, boots just fine. > > > > > > It'd be great if you could run a git bisection search please. > > > > [...snip...] > > > > ...didn't bother to go any further as the other one just deals with printk > > string... So this is the main suspect: > > > > commit 18eab8550397f1f3d4b8b2c5257c88dae25d58ed > > Author: Venkatesh Pallipadi <venkatesh.pallipadi@xxxxxxxxx> > > Date: Fri Jun 15 19:37:00 2007 -0400 > > > > ACPI: Enable C3 even when PM2_control is zero > > > > On systems that do not have pm2_control_block, we cannot really use > > ARB_DISABLE before C3. We used to disable C3 totally on such systems. > > > > To be compatible with Windows, we need to enable C3 on such systems now. > > We just skip ARB_DISABLE step before entering the C3-state and assume > > hardware is handling things correctly. Also, ACPI spec is not clear > > about pm2_control is _needed_ for C3 or not. > > > > We have atleast one system that need this to enable C3. > > > > Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@xxxxxxxxx> > > Signed-off-by: Len Brown <len.brown@xxxxxxxxx> > > > > OK, that's great, thanks. So just to double-check, could you please > confirm that the below reversion fixes this post-2.6.22 regression? Hmm, it was really worth of it, I did: $ git-fetch linus $ git-reset --hard linus [...make & install & boot...] ...and voila, the problem went away, so something else seems to have fixed it between: ac07860264bd and 963c6527e0a0e. As you can notice, I didn't even have to revert it (I was just double checking current mainline first). Is there a need to get a more detailed view about the cause or something, or are details of this issue clear enough to everyone? I can do some more research if necessary, though expect a bit longer latencies during the next week... In case none, thanks everyone, this issue seems solved. :-) -- i.
