tree 2df72c4a0c12be47a27ed11f22621d68eaee435b
parent 0bcc7ca40bd823193224e9f38bafbd8325aaf566
author NeilBrown <neilb@suse.de> 1630276594 +1000
committer Chuck Lever <chuck.lever@oracle.com> 1630508707 -0400

SUNRPC: don't pause on incomplete allocation

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@gmail.com>
Reported-and-tested-by: Lothar Paltins <lopa@mailbox.org>
Fixes: f6e70aab9dfe ("SUNRPC: refresh rq_pages using a bulk page allocator")
Signed-off-by: NeilBrown <neilb@suse.de>
Acked-by: Mel Gorman <mgorman@suse.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>