When calculating amount of dirtyable memory, min_free_kbytes should be subtracted because it is not intended for dirty pages.
Using an "extern int" because that is the only interface to some such sysctl values. (This patch does not solve the PAE OOM issue.) Paul Szabo [email protected] http://www.maths.usyd.edu.au/u/psz/ School of Mathematics and Statistics University of Sydney Australia Reported-by: Paul Szabo <[email protected]> Reference: http://bugs.debian.org/695182 Signed-off-by: Paul Szabo <[email protected]> --- mm/page-writeback.c.old 2012-12-06 22:20:40.000000000 +1100 +++ mm/page-writeback.c 2013-01-21 13:57:05.000000000 +1100 @@ -343,12 +343,16 @@ unsigned long determine_dirtyable_memory(void) { unsigned long x; + extern int min_free_kbytes; x = global_page_state(NR_FREE_PAGES) + global_reclaimable_pages(); if (!vm_highmem_is_dirtyable) x -= highmem_dirtyable_memory(x); + /* Subtract min_free_kbytes */ + x -= min(x, min_free_kbytes >> (PAGE_SHIFT - 10)); + return x + 1; /* Ensure that we never return 0 */ } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
