Re: Q: nr_threads locking
Andrew Morton (akpm@digeo.com)
Mon, 21 Apr 2003 11:28:58 -0700
Manfred Spraul <manfred@colorfullife.com> wrote:
>
> Hi Andrew,
>
> According to the comments, nr_threads is protected by lock_kernel, but
> do_fork() runs without the bkl for ages.
> Would it be possible to use your percpu_counters for nr_threads? It
> seems to be used only to guard against fork bombs and for i_nlink of /proc.
>
It would be possible, yes.
But thread creation is a "rare" event compared to pagefaults and syscalls.
An atomic_t will be OK there.
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