On Sat, 2006-10-14 at 06:19 +0200, Nick Piggin wrote:
> On Fri, Oct 13, 2006 at 03:14:57PM -0700, Andrew Morton wrote:
> > On Fri, 13 Oct 2006 18:44:52 +0200 (CEST)
> > Nick Piggin <[email protected]> wrote:
> > > @@ -2450,6 +2436,7 @@ int nobh_truncate_page(struct address_sp
> > > memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
> > > flush_dcache_page(page);
> > > kunmap_atomic(kaddr, KM_USER0);
> > > + SetPageUptodate(page);
> > > set_page_dirty(page);
> > > }
> > > unlock_page(page);
> >
> > I've already forgotten why this was added. Comment, please ;)
>
> Well, nobh_prepare_write no longer sets it uptodate, so we need to if
> we're going to set_page_dirty. OTOH, why does truncate_page need to
> zero the pagecache anyway? I wonder if we couldn't delete this whole
> function? (not in this patchset!)
It zeros the tail end of the page so we don't leak old data?
-
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/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
