On Mon, 2007-10-29 at 01:17 -0700, Jaya Kumar wrote: > On 10/29/07, Andrew Morton <[EMAIL PROTECTED]> wrote: > > On Mon, 22 Oct 2007 16:40:57 +0200 Stefani Seibold <[EMAIL PROTECTED]> > > wrote: > > > > > > The problem original occurs with the fb_defio driver > > > (driver/video/fb_defio.c). > > > This driver use the vm_ops.page_mkwrite() handler for tracking the > > > modified pages, > > > which will be in an extra thread handled, to perform the IO and clean and > > > write protect all pages with page_clean(). > > > > > Hi, > > An aside, I just tested that deferred IO works fine on 2.6.22.10/pxa255. > > I understood from the thread that PeterZ is looking into page_mkclean > changes which I guess went into 2.6.23. I'm also happy to help in any > way if the way we're doing fb_defio needs to change.
Yeah, its the truncate race stuff introduced by Nick in d0217ac04ca6591841e5665f518e38064f4e65bd I'm a bit at a loss on how to go around fixing this. One ugly idea I had was to check page->mapping before going into page_mkwrite() and when that is null, don't bother with the truncate check. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
