Re: process creation time increases linearly with shmem

[Nick Piggin]

Ray Fucillo wrote:
> I am seeing process creation time increase linearly with the size of the 
> shared memory segment that the parent touches.  The attached forktest.c 
> is a very simple user program that illustrates this behavior, which I 
> have tested on various kernel versions from 2.4 through 2.6.  Is this a 
> known issue, and is it solvable?

fork() can be changed so as not to set up page tables for
MAP_SHARED mappings. I think that has other tradeoffs like
initially causing several unavoidable faults reading
libraries and program text.

What kind of application are you using?

--
SUSE Labs, Novell Inc.

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