Re: Linux 2.6.29

Mark Lord
2009-04-06T21:27:24Z

Lennart Sorensen wrote:
> On Fri, Apr 03, 2009 at 06:28:36PM -0400, Jeff Moyer wrote:
>> Could you try one more test, please? Switch back to CFQ and set
>> /sys/block/sdX/queue/iosched/slice_idle to 0?
>
> I actually am running cfq at the moment, but with Mark's (I think it
> was) preload library to change fsync calls to at most one per 5 seconds
> instead of 10 per second. So far that has certainly made things a lot
> better as far as I can tell. Maybe not as good as anticipatory seemed
> to be but certainly better.
>
> I can try your suggestion too.
..

Yeah, I think the sync_file_range() patch is the way to go.
It seems to be smooth enough here with four or five simultaneous recordings,
a couple of commflaggers, and an HD playback all happening at once.

Cheers