On Tue 25-08-15 22:01:31, Yaowei Bai wrote: > Every zone's protection is calculated from managed_pages not > present_pages, to avoid misleading, correct it. This can be folded in to your previous patch http://marc.info/?l=linux-mm&m=144023106610358&w=2 > > Signed-off-by: Yaowei Bai <bywxiaobai@xxxxxxx> > --- > Documentation/sysctl/vm.txt | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt > index 9832ec5..1739b31 100644 > --- a/Documentation/sysctl/vm.txt > +++ b/Documentation/sysctl/vm.txt > @@ -349,7 +349,7 @@ zone[i]'s protection[j] is calculated by following expression. > > (i < j): > zone[i]->protection[j] > - = (total sums of present_pages from zone[i+1] to zone[j] on the node) > + = (total sums of managed_pages from zone[i+1] to zone[j] on the node) > / lowmem_reserve_ratio[i]; > (i = j): > (should not be protected. = 0; > @@ -360,7 +360,7 @@ The default values of lowmem_reserve_ratio[i] are > 256 (if zone[i] means DMA or DMA32 zone) > 32 (others). > As above expression, they are reciprocal number of ratio. > -256 means 1/256. # of protection pages becomes about "0.39%" of total present > +256 means 1/256. # of protection pages becomes about "0.39%" of total managed > pages of higher zones on the node. > > If you would like to protect more pages, smaller values are effective. > -- > 1.9.1 > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Michal Hocko SUSE Labs -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>