Messages in this thread | | | Date | Fri, 30 May 2008 08:01:02 +0200 | From | Eric Dumazet <> | Subject | Re: [patch 00/41] cpu alloc / cpu ops v3: Optimize per cpu access |
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Andrew Morton a écrit : > > It was just an example. There will be others. > > tcp_v4_md5_do_add > ->tcp_alloc_md5sig_pool > ->__tcp_alloc_md5sig_pool > > does an alloc_percpu for each md5-capable TCP connection. I think - it > doesn't matter really, because something _could_. And if something > _does_, we're screwed. > Last time I took a look on this stuff, this was a percpu allocation for all connections, not for each TCP session. (It should be static, instead of dynamic )
Really, percpu allocations are currently not frequent at all.
vmalloc()/vfreee() are way more frequent and still use a list.
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