On Tuesday 08 August 2006 12:43, Jens Axboe wrote: > On Tue, Aug 08 2006, Jiri Slaby wrote: > > Rafael J. Wysocki wrote: > > >On Monday 07 August 2006 18:23, Jason Lunz wrote: > > >>In gmane.linux.kernel, you wrote: > > >>>>ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc3/2.6.18-rc3-mm2/ > > >>>I tried it and guess what :)... swsusp doesn't work :@. > > >>> > > >>>This time I was able to dump process states with sysrq-t: > > >>>http://www.fi.muni.cz/~xslaby/sklad/ide2.gif > > >>> > > >>>My guess is ide2/2.0 dies (hpt370 driver), since last thing kernel > > >>>prints is suspending device 2.0 > > >>Does it go away if you revert this? > > >>ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc3/2.6.18-rc3-mm2/broken-out/ide-reprogram-disk-pio-timings-on-resume.patch > > >> > > >>That should only affect resume, not suspend, but it does mess around > > >>with ide power management. Is this maybe happening on the *second* > > >>suspend? > > >> > > >>>-hdc: ATAPI 63X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache, UDMA(33) > > >>>+hdc: ATAPI CD-ROM drive, 0kB Cache, UDMA(33) > > >>This looks suspicious. -mm does have several ide-fix-hpt3xx patches. > > > > > >I found that git-block.patch broke the suspend for me. Still have no idea > > >what's up with it. > > > > I suspect elevator changes. The wait_for_completion is not woken in > > ide-io by ll_rw_blk. But I don't understand block layer too much. > > The ide changes are far more likely, it's probably missing a completion. Actually I think the commit f74bf2e6b415588e562fdcfdd454d587eb33cd46 (Remove ->waiting member from struct request) is wrong, because generic_ide_suspend() uses the end_of_io member of rq to pass the PM data to ide_do_drive_cmd() where the pointer gets overwritten by &wait (must_wait is "true", because action == ide_wait). Previously &wait was stored in rq->waiting and it didn't overwrite the PM data. Haven't tested yet, though. Greetings, Rafael
