On Wed, Nov 28, 2012 at 2:01 PM, Mikulas Patocka <mpato...@redhat.com> wrote:
>
> This sounds sensible. I'm sending this patch.
This looks much better.
I think I'll apply this for 3.7 (since it's too late to do anything
fancier), and then for 3.8 I will rip out all the locking entirely,
because looking at the fs/buffer.c patch I wrote up, it's all totally
unnecessary.
Adding a ACCESS_ONCE() to the read of the i_blkbits value (when
creating new buffers) simply makes the whole locking thing pointless.
Just make the page lock protect the block size, and make it per-page,
and we're done.
No RCU grace period crap, no expedited mess, no nothing.
Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
