On 05/03/2025 11:36 am, Jan Beulich wrote:
> On 05.03.2025 00:22, Andrew Cooper wrote:
>> There are two issues. First, pi_test_and_clear_on() pulls the cache-line to
>> the CPU and dirties it even if there's nothing outstanding, but the final
>> bitmap_for_each() is O(256) when O(8) would do, and
On 05.03.2025 00:22, Andrew Cooper wrote:
> There are two issues. First, pi_test_and_clear_on() pulls the cache-line to
> the CPU and dirties it even if there's nothing outstanding, but the final
> bitmap_for_each() is O(256) when O(8) would do, and would avoid multiple
> atomic updates to the sam
There are two issues. First, pi_test_and_clear_on() pulls the cache-line to
the CPU and dirties it even if there's nothing outstanding, but the final
bitmap_for_each() is O(256) when O(8) would do, and would avoid multiple
atomic updates to the same IRR word.
Rewrite it from scratch, explaining w
