| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
Re: [Xen-devel] [patch 0/6] xenblk: Add O_DIRECT and O_SYNC support.
On 4/11/08 02:50, "Joe Jin" <joe.jin@xxxxxxxxxx> wrote:
> Resend.
I never saw this patchset before!
> [patch 0/6] xenblk: Add O_DIRECT and O_SYNC support.
>
> This patchset to add O_DIRECT and O_SYNC support to xenblk driver.
>
> At present xenblk driver, a ring buffer have introduced in backend and
> frontend, the cache got better for io performance. But at some conditions,
> data need write date to disk as soon as possible, this ring buffer made
> data could not sync to disk immediately, even open file with O_DIRECT or
> O_SYNC flag. Obviously some potential risks at os for IO operation,
> so sync data to disk asap which the file open with O_DIRECT/O_SYNC
> is meaningful for xenblk driver.
>
> Please review and welcome comment.
How is this better than waiting in the domU (blkfront) domain to collect the
required asynchronous responses? Scattering changes into Linux filesystems
is a dead end unless you can get the changes accepted upstream via lkml.
-- Keir
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home