On 02/04/19 18:18, Kevin Wolf wrote:
> Am 26.03.2019 um 15:11 hat Paolo Bonzini geschrieben:
>> - but actually (and a precursor to using IOCB_CMD_POLL) it should be
>> possible to have just one LinuxAioState per AioContext, and then
>> it can simply share the AioContext's EventNotifier. This removes
>> the need to do the event_notifier_test_and_clear in linux-aio.c.
>
> Isn't having only one LinuxAioState per AioContext what we already do?
> See aio_get_linux_aio().
And I should have known that:
commit 0187f5c9cb172771ba85c66e3bf61f8cde6d6561
Author: Paolo Bonzini <pbonz...@redhat.com>
Date: Mon Jul 4 18:33:20 2016 +0200
linux-aio: share one LinuxAioState within an AioContext
This has better performance because it executes fewer system calls
and does not use a bottom half per disk.
Originally proposed by Ming Lei.
The second point, which is to share the AioContext's EventNotifier,
still stands.
Paolo
