On Wed, Jan 30, 2008 at 09:03:16AM -0800, Roland Dreier wrote:
> > On a 2GB Core2 system here I see a time cat /proc/net/tcp > /dev/null
> > constently dropping from 0.44s to 0.4-0.8s system time with this change.
>
> Seems like there must be a typo in either the before or after times
> you repo
> On a 2GB Core2 system here I see a time cat /proc/net/tcp > /dev/null
> constently dropping from 0.44s to 0.4-0.8s system time with this change.
Seems like there must be a typo in either the before or after times
you report here?
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On most systems most of the TCP established/time-wait hash buckets are empty.
When walking the hash table for /proc/net/tcp their read locks would
always be aquired just to find out they're empty. This patch changes the code
to check first if the buckets have any entries before taking the lock, wh
