On Fri, 2007-09-28 at 10:33 -0700, Christoph Lameter wrote: > Again I have not seen any fallbacks to vmalloc in my testing. What we are > doing here is mainly to address your theoretical cases that we so far have > never seen to be a problem and increase the reliability of allocations of > page orders larger than 3 to a usable level. So far I have so far not > dared to enable orders larger than 3 by default. take a recent -mm kernel, boot with mem=128M. start 2 processes that each mmap a separate 64M file, and which does sequential writes on them. start a 3th process that does the same with 64M anonymous. wait for a while, and you'll see order=1 failures. - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
