On Wed, Nov 15, 2006 at 04:24:11PM -0500, Vivek Goyal wrote: > On Mon, Nov 13, 2006 at 11:43:14AM -0500, Vivek Goyal wrote: > > > > > > - Killed lots of dead code > > - Improve the cpu sanity checks to verify long mode > > is enabled when we wake up. > > - Removed the need for modifying any existing kernel page table. > > - Moved wakeup_level4_pgt into the wakeup routine so we can > > run the kernel above 4G. > > - Increased the size of the wakeup routine to 8K. > > - Renamed the variables to use the 64bit register names. > > - Lots of misc cleanups to match trampoline.S > > > > I don't have a configuration I can test this but it compiles cleanly > > and it should work, the code is very similar to the SMP trampoline, > > which I have tested. At least now the comments about still running in > > low memory are actually correct. > > > > Vivek has tested this patch for suspend to memory and it works fine. > > > > More update. Got hold of another machine and suspend/resume seems to be > facing problems. > > With 2.6.19-rc5-git2 > -------------------- > - echo 3 > /proc/acpi/sleep (Suspend to memory takes place) > - Press power button (System tries to come back but fails in MPT adapter > initialization) > > With 2.6.19-rc5-git2 + Reloc patches > ------------------------------------ > - echo 3 > /proc/acpi/sleep (Suspend to memory takes place) > - Press power button (Fan powers on but nothing additional is displayed on > serial console.) > > Will do a bisect and try to isolate the problem. >
Ok. In the new code NX bit protection feature is not being enabled and that seems to be causing the problem. I checked and enabled the NX bit feature in EFER in wakeup.S and it starts working. I think my new machine supports NX bit protection feature and if while resuming if I don't enable that feature back probably it must have caused a GPF while loading the page tables which have got NX bit set. (A guess). I know that previous machine I was testing on does not support NX bit feature and that could be the reason that previous machine did not run into the problems. Thanks Vivek _______________________________________________ fastboot mailing list [email protected] https://lists.osdl.org/mailman/listinfo/fastboot
