Re: [PATCH] lib/idr: fix ida_find_first_range() missing IDs across chunk boundaries

[Josh Law]

6 Mar 2026 20:15:29 Matthew Wilcox <willy@xxxxxxxxxxxxx>:

> On Fri, Mar 06, 2026 at 08:03:19PM +0000, Josh Law wrote:
>> ida_find_first_range() only examines the first XArray entry returned by
>> xa_find(). If that entry does not contain a set bit at or above the
>> requested offset, the function returns -ENOENT without searching
>> subsequent entries, even though later chunks may contain allocated IDs
>> within the requested range.
>
> Can I trouble you to add a test to lib/test_ida.c to demonstrate the
> problem (and that it's fixed, and that it doesn't come back)?
>
> Also this needs a Fixes: line.  I suggest 7fe6b987166b is the commit
> it's fixing.  Add Jason and Yi Liu as well as the author and committer
> of that patch.

Okay, you mind if I put the modifications to test_ida.c on the same commit? Or would you like it on another commit

V/R


Josh law