* Rafael J. Wysocki <rjw@xxxxxxx> wrote: > On Friday 03 April 2009, Ingo Molnar wrote: > > > > * Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > > > > > > +config DEBUG_PAGEALLOC > > > > + bool "Debug page memory allocations" > > > > + depends on DEBUG_KERNEL && ARCH_SUPPORTS_DEBUG_PAGEALLOC > > > > + depends on !HIBERNATION || !PPC && !SPARC > > > > + ---help--- > > > > + Unmap pages from the kernel linear mapping after free_pages(). > > > > + This results in a large slowdown, but helps to find certain types > > > > + of memory corruptions. > > > > + > > > > > > I guess this is why it wasn't discovered in my compile testing. > > > It's quite regrettable that `make allmodconfig' didn't enable the > > > feature. That's what allmodconfig is for. > > > > Hm, i _do_ remember some hibernation magic fix from Rafael, in the > > area of debugalloc. Many months ago. > > > > Rafael, is it supposed to work? If yes, i think we should unblock > > it. > > Yes, it is, at least on x86. > > ISTR using DEBUG_PAGEALLOC with hibernation quite some time ago > already. Could you please send a patch to Andrew then to remove the above dependency? Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
