On Thu, 12 May 2011, Andrea Arcangeli wrote: > On Thu, May 12, 2011 at 01:03:05PM -0500, Christoph Lameter wrote: > > On Thu, 12 May 2011, Andrea Arcangeli wrote: > > > > > even order 3 is causing troubles (which doesn't immediately make lumpy > > > activated, it only activates when priority is < DEF_PRIORITY-2, so > > > after 2 loops failing to reclaim nr_to_reclaim pages), imagine what > > > > That is a significant change for SLUB with the merge of the compaction > > code. > > Even before compaction was posted, I had to shut off lumpy reclaim or > it'd hang all the time with frequent order 9 allocations. Maybe lumpy > was better before, maybe lumpy "improved" its reliability recently, Well we are concerned about order 2 and 3 alloc here. Checking for < PAGE_ORDER_COSTLY to avoid the order 9 lumpy reclaim looks okay. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
