Hello, On Mon, Oct 08, 2012 at 05:41:14PM +0200, Rabin Vincent wrote: > It appears that when CMA is enabled, the zone watermarks are not properly > respected, leading to for example GFP_NOWAIT allocations getting access to the > high pools. > > I ran the following test code which simply allocates pages with GFP_NOWAIT > until it fails, and then tries GFP_ATOMIC. Without CMA, the GFP_ATOMIC > allocation succeeds, with CMA, it fails too.
Good spot. By wrong zone_watermark_check, it can consume reserved memory pool. > > Logs attached (includes my patch which prints the migration type in the > failure > message http://marc.info/?l=linux-mm&m=134971041701306&w=2), taken on 3.6 > kernel. > Fortunately, recently, Bart sent a patch about that. http://marc.info/?l=linux-mm&m=134763299016693&w=2 Could you test above patches in your kernel? You have to apply [2/4], [3/4], [4/4] and don't need [1/4]. Thanks. -- Kind regards, Minchan Kim -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
