[lkml]   [2005]   [Aug]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: process creation time increases linearly with shmem
Ray Fucillo wrote:

> Nick Piggin wrote:
>> How does the following look? (I changed the comment a bit). Andrew,
>> please
>> apply if nobody objects.
> Nick, I applied this latest patch to a 2.6.12 kernel and found that it
> does resolve the problem. Prior to the patch on this machine, I was
> seeing about 23ms spent in fork for ever 100MB of shared memory
> segment. After applying the patch, fork is taking about 1ms
> regardless of the shared memory size.

Hi Ray,
That's good news. I think we should probably consider putting the patch in
2.6.14 or if not, then definitely 2.6.15.

Andrew, did you pick up the patch or should I resend to someone?

I think the fork latency alone is enough to justify inclusion...
however, did
you actually see increased aggregate throughput of your database (or at
not a _decreased_ throughput)?

> Many thanks to everyone for your help on this.

Well thank you very much for breaking the kernel and telling us about it! :)


Send instant messages to your online friends

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-08-30 02:54    [W:0.094 / U:0.520 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site