diff options
author | Rafael J. Wysocki <rjw@sisk.pl> | 2008-03-12 00:34:57 +0100 |
---|---|---|
committer | Len Brown <len.brown@intel.com> | 2008-03-11 23:15:55 -0400 |
commit | a82f7119fd940c1505fc9fdf93d835fa52bc075d (patch) | |
tree | e8fc2aaa6dc73da9dc2626aa6d239bdcf8c9d44d /arch/avr32 | |
parent | baadac8b10c5ac15ce3d26b68fa266c8889b163f (diff) |
Hibernation: Fix mark_nosave_pages()
There is a problem in the hibernation code that triggers on some NUMA
systems on which pfn_valid() returns 'true' for some PFNs that don't
belong to any zone. Namely, there is a BUG_ON() in
memory_bm_find_bit() that triggers for PFNs not belonging to any
zone and passing the pfn_valid() test. On the affected systems it
triggers when we mark PFNs reported by the platform as not saveable,
because the PFNs in question belong to a region mapped directly using
iorepam() (i.e. the ACPI data area) and they pass the pfn_valid()
test.
Modify memory_bm_find_bit() so that it returns an error if given PFN
doesn't belong to any zone instead of crashing the kernel and ignore
the result returned by it in mark_nosave_pages(), while marking the
"nosave" memory regions.
This doesn't affect the hibernation functionality, as we won't touch
the PFNs in question anyway.
http://bugzilla.kernel.org/show_bug.cgi?id=9966 .
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/avr32')
0 files changed, 0 insertions, 0 deletions