Re: [Qemu-devel] [PATCH 7/7] block/raw-posix: set max_write_zeroes to INT_MAX for regular files

[Denis V. Lunev]

On 27/01/15 21:05, Max Reitz wrote:
> On 2015-01-27 at 08:51, Denis V. Lunev wrote:
> > fallocate() works fine and could handle properly with arbitrary size
> > requests.
>
> Maybe "could properly handle arbitrary size requests" (or 
> "...arbitrarily sized requests")?
>
> > There is no sense to reduce the amount of space to fallocate.
> > The bigger is the size, the better is the performance as the amount of
> > journal updates is reduced.
>
> True for fallocate(). But is it true for xfs_write_zeroes(), too? I 
> guess so, but I don't know.
>
> If it does, the patch looks good to me.
>
> Max

checked.

xfs_ioc_space (ioctl handler) calls exactly the same xfs_zero_file_space as
performed by xfs_file_fallocate on fallocate path.

I will reflect this in the description

Regards,
    Den