On Sun, Oct 27, 2013 at 09:16:53PM +0800, Ming Lei wrote: > On Sun, Oct 27, 2013 at 8:50 PM, Aaro Koskinen <aaro.koskinen@xxxxxx> wrote: > > > > On ARM v3.9 or older kernels do not trigger this BUG, at seems it only > > started to appear with the following commit (bisected): > > > > commit 1bc39742aab09248169ef9d3727c9def3528b3f3 > > Author: Simon Baatz <gmbnomis@xxxxxxxxx> > > Date: Mon Jun 10 21:10:12 2013 +0100 > > > > ARM: 7755/1: handle user space mapped pages in flush_kernel_dcache_page > > The above commit only starts to implement the helper on ARM, > but according to Documentation/cachetlb.txt, looks caller of > flush_kernel_dcache_page() should make sure the passed > 'page' is a user space page. I don't think PageSlab() is the right test tho. Wouldn't testing against user_addr_max() make more sense? Thanks. -- tejun -- 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>