Messages in this thread |  | | | Date | Thu, 9 Sep 2004 09:01:16 -0700 | | From | "David S. Miller" <> | | Subject | Re: [patch][9/9] block: remove bio walking |
| |
On Thu, 9 Sep 2004 17:44:53 +0200 Jens Axboe <axboe@suse.de> wrote:
> On Thu, Sep 09 2004, Russell King wrote: > > Essentially, kernel PIO writes data into the page cache, and that action > > may leave data in the CPU's caches. Since the kernels mappings may not > > be coherent with mappings in userspace, data written to the kernel > > mappings may remain in the data cache, and stale data would be visible > > to user space. > > > > There has been talk about using flush_dcache_page() to resolve > > this issue, but I'm not sure what the outcome was. Certainly > > flush_dcache_page() is supposed to be used before the data in the > > kernels page cache is read or written. > > Have you ever tested bouncing on arm? It seems to be lacking a > flush_dcache_page() indeed, how does this look?
This looks like a good fix to me too. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |