2.6.27-stable review patch. If anyone has any objections, please let us know. ------------------ From: Ingo Molnar commit 1e22436eba84edfec9c25e5a25d09062c4f91ca9 upstream there's multiple reports about suspend/resume related low memory corruption in this bugzilla: http://bugzilla.kernel.org/show_bug.cgi?id=11237 the common pattern is that the corruption is caused by the BIOS, and that it affects some portion of the first 64K of physical RAM. So add a DMI quirk This will waste 64K RAM on 'good' systems too, but without knowing the exact nature of this BIOS memory corruption this is the safest approach. This might as well solve a wide range of suspend/resume breakages under Linux. Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- arch/x86/kernel/setup.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -581,10 +581,10 @@ struct x86_quirks *x86_quirks __initdata static int __init dmi_low_memory_corruption(const struct dmi_system_id *d) { printk(KERN_NOTICE - "%s detected: BIOS corrupts 0xc000, working it around.\n", + "%s detected: BIOS may corrupt low RAM, working it around.\n", d->ident); - reserve_early(0xc000, 0xc400, "BIOS quirk"); + reserve_early(0x0, 0x10000, "BIOS quirk"); return 0; } @@ -598,6 +598,13 @@ static struct dmi_system_id __initdata b DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), }, }, + { + .callback = dmi_low_memory_corruption, + .ident = "Phoenix BIOS", + .matches = { + DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"), + }, + }, {} }; -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/