On Thu, Aug 13, 2009 at 01:50:47PM -0700, Travis Geiselbrecht wrote: > I've seen something like this with the block bounce enabled on another > processor on 2.6.29. Problem is it doesn't flush when copying to/from > the bounce buffer. > > This patch from 2.6.31 seems to fix it, might be worth a try: > > The only thing that might be worth adding is > cache_is_vipt_nonaliasing() if you're running an arm11 with 16K cache. > For the purposes of icache coherency at least it'd be required for > pretty much all cache variants.
Thanks for this. I had been looking at sg_copy_buffer() a little bit and was suspecting that missing flush might be to blame. I guess it probably works okay as-is for the page cache because, as I understand it, the page cache uses the kernel's static mappings. I'll try this patch out after I have a chance to confirm that disabling the bounce buffer gets the O_DIRECT writes working. Cheers, Seth --~--~---------~--~----~------------~-------~--~----~ unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel -~----------~----~----~----~------~----~------~--~---
