Re: [patch 20/20] XEN-paravirt: Add Xen virtual block device driver.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 14/1/07 11:05 am, "Jan Engelhardt" <[email protected]> wrote:

>> The block device frontend driver allows the kernel to access block
>> devices exported exported by a virtual machine containing a physical
>> block device driver.
> 
> Is this significantly different from ubd/hostfs that it actually warrants a
> reinvention?

It is certainly unlike hostfs because hostfs provides file-level access to
host storage, not block-level. It's unlike both ubd and hostfs in that both
of those (I believe) make significant use of the syscall interface (and so
assume they run in a process on a Linux host). Also our driver appears to be
lower level, pushing more responsibility for features like CoW into the VMM.
Arguably that's a more generically reusable and flexible strategy although
it requires more VMM run-time support (which a Xen system provides).

>> + (void)xenbus_switch_state(info->xbdev, XenbusStateConnected);
> 
> Cast remove, if xenbus_switch_state does not have __must_check.
> Also elsewhere.

Okay, we should certainly follow the general rule here.

 Thanks,
 Keir


-
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]
  Powered by Linux