Re: [PATCH] ext4: Add support for FIDTRIM, a best-effort ioctl for deep discard trim

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On Thu, Jul 24, 2014 at 5:08 AM, Dave Chinner <david@xxxxxxxxxxxxx> wrote:
>
> On Wed, Jul 23, 2014 at 04:47:18PM -0700, JP Abgrall wrote:
> > +#define FIDTRIM      _IOWR('X', 122, struct fstrim_range)    /* Deep discard trim */
>
> The 'X' ioctl namespace is actually XFS's ioctl namespace. FIDTRIM
> should be in the 'f' namespace
Ok.
How should the next sequence number be handled?
Go with ('f', 122,...) after FITRIM, or go with ('f', 12,...) after
FS_IOC_FIEMAP ('f' namepsace)?
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