On Wed, Jul 21, 2010 at 10:51:36AM +0900, KAMEZAWA Hiroyuki wrote: > On Tue, 20 Jul 2010 11:35:12 -0600 > dann frazier <dannf@xxxxxxxxxx> wrote: > > > Debian's ia64 autobuilders have been experiencing system crashes while > > trying to run the gdb test suite: > > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=588574 > > > > I was able to reproduce this w/ the latest git tree, and bisected it > > down to this commit, introduced in 2.6.32: > > > > commit 62eede62dafb4a6633eae7ffbeb34c60dba5e7b1 > > Author: Hugh Dickins <hugh.dickins@xxxxxxxxxxxxx> > > Date: Mon Sep 21 17:03:34 2009 -0700 > > > > mm: ZERO_PAGE without PTE_SPECIAL > > > > Reinstate anonymous use of ZERO_PAGE to all architectures, not just to > > those which __HAVE_ARCH_PTE_SPECIAL: as suggested by Nick Piggin. > > > > Contrary to how I'd imagined it, there's nothing ugly about this, just a > > zero_pfn test built into one or another block of vm_normal_page(). > > > > But the MIPS ZERO_PAGE-of-many-colours case demands is_zero_pfn() and > > my_zero_pfn() inlines. Reinstate its mremap move_pte() shuffling of > > ZERO_PAGEs we did from 2.6.17 to 2.6.19? Not unless someone shouts for > > that: it would have to take vm_flags to weed out some cases. > > > > fyi, I found this to not be reproducible on SLES11 SP1 (which is > > 2.6.32-based). I compared the .configs and found that the relevant > > difference is the PAGE_SIZE. It does not fail w/ 64KB pages, but > > reliably fails w/ 16KB pages. > > > > Sorry, I have no idea... > Hmm, what is the address of empty_zero_page[] on your debian(16kb-page) ? dannf@krebs:~$ grep empty_zero_page /boot/System.map-2.6.32-5-mckinley a0000001008784c0 d __ksymtab_empty_zero_page a000000100882688 d __kcrctab_empty_zero_page a000000100884ca4 r __kstrtab_empty_zero_page a000000100974000 D empty_zero_page -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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