Hello, On 10/8/2012 5:41 PM, 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.
Could You run your test with latest linux-next kernel? There have been some patches merged to akpm tree which should fix accounting for free and free cma pages. I hope it should fix this issue.
Best regards -- Marek Szyprowski Samsung Poland R&D Center -- 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/
