On Tue, 15 Aug 2006, Evgeniy Polyakov wrote:
> On Tue, Aug 15, 2006 at 03:49:28PM +0200, Peter Zijlstra ([EMAIL PROTECTED])
> wrote:
>
> > It could if you can provide adequate detection of memory pressure and
> > fallback to a degraded mode within the same allocator/stack and can
> > guarantee limited service to critical parts.
>
> It is not needed, since network allocations are separated from main
> system ones.
> I think I need to show an example here.
>
> Let's main system works only with TCP for simplicity.
> Let's maximum allowed memory is limited by 1mb (it is 768k on machine
> with 1gb of ram).
The maximum amount of memory available for TCP on a system with 1 GB
of memory is 768 MB (not 768 KB).
[EMAIL PROTECTED] ~]$ cat /proc/meminfo
MemTotal: 1034924 kB
...
[EMAIL PROTECTED] ~]$ cat /proc/sys/net/ipv4/tcp_mem
98304 131072 196608
Since tcp_mem is in pages (4K in this case), maximum TCP memory
is 196608*4K or 768 MB.
Or am I missing something obvious.
-Bill
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