Re: Linux 3.7-rc8

[Linus Torvalds]

On Mon, Dec 3, 2012 at 2:44 PM, Tony Luck <tony.luck@xxxxxxxxx> wrote:
>> Just for info, can you add a "WARN_ON_ONCE()" to handle_bad_sector()
>> just so that I see which particular path your kvm load triggers.
>
> On native ia64 (with SLES11 userspace) I see:

Interesting. I knew about the possibility of this, and had actually
*tried* to trigger this with the regular read() system call. But
couldn't, so I had assumed that it was some special path (ie
O_DIRECT). But it's just the regular read-ahead.

I guess I need to try harder. I'm guessing that there's a 4kB
filesystem there, and the block device size isn't 4kB-aligned or
something.

              Linus
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