Linus Torvalds wrote: > On Tue, Feb 11, 2014 at 1:39 PM, Andrew Morton > <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > > > > hm, we tried that a couple of times, many years ago. Try > > https://www.google.com/#q="faultahead"; then spend a frustrating hour > > trying to work out what went wrong. > > > > Of course, the implementation might have been poor and perhaps we can > > get this to work. > > Kirill's patch looks good, and shouldn't have much overhead, but the > fact that it doesn't work is obviously something of a strike against > it.. ;) > > I don't see anything obviously wrong in it, although I think 32 > fault-around pages might be excessive (it uses stack space, and there > are expenses wrt accounting and tear-down). But the patch is also > against some odd kernel (presumably -mm) with lots of other changes, > so I don't even know what it might be missing. It's on top of v3.14-rc1 + __do_fault() claen up[1]. It's also on git: git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux fault_around/v1 [1] http://thread.gmane.org/gmane.linux.kernel.mm/113364 -- Kirill A. Shutemov -- 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>