Hi Marek, On Tue, Feb 05, 2013 at 08:10:19AM +0100, Marek Szyprowski wrote: > Hello, > > On 2/5/2013 12:34 AM, Minchan Kim wrote: > >On Mon, Feb 04, 2013 at 11:27:05AM +0100, Marek Szyprowski wrote: > >> The total number of low memory pages is determined as > >> totalram_pages - totalhigh_pages, so without this patch all CMA > >> pageblocks placed in highmem were accounted to low memory. > > > >So what's the end user effect? With the effect, we have to decide > >routing it on stable. > > > >> > >> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> > >> --- > >> mm/page_alloc.c | 4 ++++ > >> 1 file changed, 4 insertions(+) > >> > >> diff --git a/mm/page_alloc.c b/mm/page_alloc.c > >> index f5bab0a..6415d93 100644 > >> --- a/mm/page_alloc.c > >> +++ b/mm/page_alloc.c > >> @@ -773,6 +773,10 @@ void __init init_cma_reserved_pageblock(struct page *page) > >> set_pageblock_migratetype(page, MIGRATE_CMA); > >> __free_pages(page, pageblock_order); > >> totalram_pages += pageblock_nr_pages; > >> +#ifdef CONFIG_HIGHMEM > > > >We don't need #ifdef/#endif. > > #ifdef is required to let this code compile when highmem is not enabled, > becuase totalhigh_pages is defined as 0, see include/linux/highmem.h Argh, Sorry for the noise. I think it would be better to use accessor but it's a just nitpick. :) Thanks! > > >> + if (PageHighMem(page)) > >> + totalhigh_pages += pageblock_nr_pages; > >> +#endif > >> } > >> #endif > >> > > Best regards > -- > Marek Szyprowski > Samsung Poland R&D Center > > > -- > 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> -- Kind regards, Minchan Kim -- 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>