----- "Ken'ichi Ohmichi" <oomichi@xxxxxxxxxxxxxxxxx> wrote: > Hi Dave, > > When 'kmem -p'/'kmem -i' is executed on i386 linux-2.6.26 sparsemem > kernel, > current crash utility misunderstands the number of struct page in > each > section and refers invalid struct page. > > The cause is that SECTION_SIZE_BITS of PAE has been changed to 29 from > 30 > since linux-2.6.26 by the following: > > [PATCH 3 of 4] sparsemem: reduce i386 PAE section size > http://www.uwsg.iu.edu/hypermail/linux/kernel/0803.3/1882.html > > If applying the attached patch, the crash utility can catch up the > above change. It makes the results of both 'kmem -p' and 'kmem -i' > correct. The attached patch is for crash-4.0-7.4. > > There is the same problem in makedumpfile, and I will fix it :-) > > > Thanks > Ken'ichi Ohmichi Thanks Ken'ichi -- it's queued for the next release. Dave > > Signed-off-by: Ken'ichi Ohmichi <oomichi@xxxxxxxxxxxxxxxxx> > --- > diff -rpuN crash-4.0-7.4.orig/defs.h crash-4.0-7.4/defs.h > --- crash-4.0-7.4.orig/defs.h 2008-10-16 17:32:46.000000000 +0900 > +++ crash-4.0-7.4/defs.h 2008-10-16 17:46:30.000000000 +0900 > @@ -2069,7 +2069,8 @@ struct load_module { > #define TIF_SIGPENDING (2) > > // CONFIG_X86_PAE > -#define _SECTION_SIZE_BITS_PAE 30 > +#define _SECTION_SIZE_BITS_PAE_ORIG 30 > +#define _SECTION_SIZE_BITS_PAE_2_6_26 29 > #define _MAX_PHYSMEM_BITS_PAE 36 > > // !CONFIG_X86_PAE > diff -rpuN crash-4.0-7.4.orig/x86.c crash-4.0-7.4/x86.c > --- crash-4.0-7.4.orig/x86.c 2008-10-16 17:32:46.000000000 +0900 > +++ crash-4.0-7.4/x86.c 2008-10-16 17:47:58.000000000 +0900 > @@ -1819,7 +1819,12 @@ x86_init(int when) > } > > if (machdep->flags & PAE) { > - machdep->section_size_bits = _SECTION_SIZE_BITS_PAE; > + if (THIS_KERNEL_VERSION < LINUX(2,6,26)) > + machdep->section_size_bits = > + _SECTION_SIZE_BITS_PAE_ORIG; > + else > + machdep->section_size_bits = > + _SECTION_SIZE_BITS_PAE_2_6_26; > machdep->max_physmem_bits = _MAX_PHYSMEM_BITS_PAE; > } else { > machdep->section_size_bits = _SECTION_SIZE_BITS; > _ > > -- > Crash-utility mailing list > Crash-utility@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/crash-utility -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
