Re: Subject: [RFC MM] mmap_sem scaling: Use mutex and percpu counter instead

From: Minchan Kim
Date: Fri Nov 06 2009 - 23:19:48 EST

On Sat, Nov 7, 2009 at 2:10 AM, Christoph Lameter
<cl@xxxxxxxxxxxxxxxxxxxx> wrote:
> On Sat, 7 Nov 2009, Minchan Kim wrote:
>> How about change from 'mm_readers' to 'is_readers' to improve your
>> goal 'scalibility'?
> Good idea. Thanks. Next rev will use your suggestion.
> Any creative thoughts on what to do about the 1 millisecond wait period?

it would be importatn to prevent livelock for reader to hold lock
continuously before
hodling writer than 1 msec write ovhead.
First of all, After we solve it, second step is that optimize write
overhead, I think.

Kind regards,
Minchan Kim
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at