Re: changing mm->mmap_sem (was: Re: system call for process

[Rik van Riel]

On Sun, 18 Mar 2001, Linus Torvalds wrote:
> On Sun, 18 Mar 2001, Rik van Riel wrote:
> >
> > Indeed, having threaded apps do multiple page faults at the
> > same time is the main goal of this patch. However, I don't
> > see how it would be good for scalability to have multiple
> > threads fault in the same page at the same time, when they
> > could just wait for one of them to do the work.
> 
> But they will.
> 
> That's what lock_page() etc are there for - there's no need for the VM
> to synchronize because we already have the synchronization primitives
> at a lower level.

Indeed. I'll go multithread the do_no_page and do_swap_page
functions tomorrow (maybe even tonight ;)).

regards,

Rik
--
Virtual memory is like a game you can't win;
However, without VM there's truly nothing to lose...

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