On Mon, Aug 30, 2021 at 08:36:34AM +1000, NeilBrown wrote:
>
> alloc_pages_bulk_array() attempts to allocate at least one page based on
> the provided pages, and then opportunistically allocates more if that
> can be done without dropping the spinlock.
>
> So if it returns fewer than requested, that could just mean that it
> needed to drop the lock. In that case, try again immediately.
>
> Only pause for a time if no progress could be made.
>
> Reported-and-tested-by: Mike Javorski <mike.javorski@xxxxxxxxx>
> Reported-and-tested-by: Lothar Paltins <lopa@xxxxxxxxxxx>
> Fixes: f6e70aab9dfe ("SUNRPC: refresh rq_pages using a bulk page allocator")
> Signed-off-by: NeilBrown <neilb@xxxxxxx>
Acked-by: Mel Gorman <mgorman@xxxxxxxx>
--
Mel Gorman
SUSE Labs
