Ignore my patch. I can see, a patch has already been accepted. I only replied too fast (before I read the rest of the thread). Petr Dne Pá 16. prosince 2011 09:04:23 Petr Tesarik napsal(a): > The phys_addr_t per_cpu_ptr_to_phys() function ignores the offset within a > page, whenever not using a simple translation using __pa(). > > Without this patch /sys/devices/system/cpu/cpu*/crash_notes shows incorrect > values, which breaks kdump. Other things may also be broken. > > Signed-off-by: Petr Tesarik <ptesarik@xxxxxxx> > > diff --git a/mm/percpu.c b/mm/percpu.c > index 3bb810a..1a1b5ac 100644 > --- a/mm/percpu.c > +++ b/mm/percpu.c > @@ -998,6 +998,7 @@ phys_addr_t per_cpu_ptr_to_phys(void *addr) > bool in_first_chunk = false; > unsigned long first_low, first_high; > unsigned int cpu; > + phys_addr_t page_addr; > > /* > * The following test on unit_low/high isn't strictly > @@ -1023,9 +1024,10 @@ phys_addr_t per_cpu_ptr_to_phys(void *addr) > if (!is_vmalloc_addr(addr)) > return __pa(addr); > else > - return page_to_phys(vmalloc_to_page(addr)); > + page_addr = page_to_phys(vmalloc_to_page(addr)); > } else > - return page_to_phys(pcpu_addr_to_page(addr)); > + page_addr = page_to_phys(pcpu_addr_to_page(addr)); > + return page_addr + offset_in_page(addr); > } > > /** > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo@xxxxxxxxx. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Fight unfair telecom internet charges in Canada: sign > http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> > email@xxxxxxxxx </a> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href