On 11/25/2015 06:32 AM, Joonsoo Kim wrote: > Now, we have tracepoint in test_pages_isolated() to notify > pfn which cannot be isolated. But, in alloc_contig_range(), > some error path doesn't call test_pages_isolated() so it's still > hard to know exact pfn that causes allocation failure. > > This patch change this situation by calling test_pages_isolated() > in almost error path. In allocation failure case, some overhead > is added by this change, but, allocation failure is really rare > event so it would not matter. > > In fatal signal pending case, we don't call test_pages_isolated() > because this failure is intentional one. > > There was a bogus outer_start problem due to unchecked buddy order > and this patch also fix it. Before this patch, it didn't matter, > because end result is same thing. But, after this patch, > tracepoint will report failed pfn so it should be accurate. > > Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx> -- 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>