Hi, On Tue, Feb 5, 2013 at 8:43 AM, Minchan Kim <minchan@xxxxxxxxxx> wrote: > Hello, > > On Tue, Feb 05, 2013 at 08:29:26AM +0900, Kyungmin Park wrote: >> On Tue, Feb 5, 2013 at 8:06 AM, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: >> > On Mon, 04 Feb 2013 11:27:05 +0100 >> > Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> 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. >> > >> > What are the end-user-visible effects of this bug? >> >> Even though CMA is located at highmem. LowTotal has more than lowmem >> address spaces. >> >> e.g., >> lowmem : 0xc0000000 - 0xdf000000 ( 496 MB) >> LowTotal: 555788 kB >> >> > >> > (This information is needed so that others can make patch-scheduling >> > decisions and should be included in all bugfix changelogs unless it is >> > obvious). >> >> CMA Highmem support is new feature. so don't need to go stable tree. > > I would like to clarify it because I remembered alloc_migrate_target have considered > CMA pages could be highmem. Is it really new feature? If so, could you point out > enabling patches for the new feature? > Here's related patch. http://www.spinics.net/lists/arm-kernel/msg222369.html Previous time, it's not fully tested and now we checked it with highmem support patches. Thank you, Kyungmin Park > struct page *alloc_migrate_target(struct page *page, unsigned long private, > int **resultp) > { > gfp_t gfp_mask = GFP_USER | __GFP_MOVABLE; > > if (PageHighMem(page)) > gfp_mask |= __GFP_HIGHMEM; > > return alloc_page(gfp_mask); > } > > Thanks. > >> >> Thank you, >> Kyungmin Park >> > >> > -- >> > 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> >> >> -- >> 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> -- 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>