On Mon, 18 Oct 2010 12:33:31 +0100 Mel Gorman <mel@xxxxxxxxx> wrote: > A bit but I still don't know why it would cause corruption. Maybe this is still > a caching issue but the difference in timing between list_add and list_add_tail > is enough to hide the bug. It's also possible there are some registers > ioremapped after the memmap array and reading them is causing some > problem. > > Andrew, what is the right thing to do here? We could flail around looking > for explanations as to why the bug causes a user buffer corruption but never > get an answer or do we go with this patch, preferably before 2.6.36 releases? Well, you've spotted a bug so I'd say we fix it asap. It's a bit of a shame that we lose the only known way of reproducing a different bug, but presumably that will come back and bite someone else one day, and we'll fix it then :( -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>