| To: | "David S. Miller" <davem@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: atomic_dec_and_test for child dst needed in dst_destroy? |
| From: | Christoph Lameter <christoph@xxxxxxxxxxx> |
| Date: | Wed, 6 Apr 2005 11:48:50 -0700 (PDT) |
| Cc: | Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>, netdev@xxxxxxxxxxx |
| In-reply-to: | <20050406111721.3ac67605.davem@davemloft.net> |
| References: | <Pine.LNX.4.58.0504051925250.21486@graphe.net> <E1DJ5y2-0003rF-00@gondolin.me.apana.org.au> <20050406111721.3ac67605.davem@davemloft.net> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
On Wed, 6 Apr 2005, David S. Miller wrote: > See his other emails in this thread. If it can be converted to > atomic_dec() then he wants to change the counter into an array > of counters on NUMA systems. Correct. > But his trick only works if the atomic_dec_and_test() can be eliminated > for all cases, which we're now quite certain is not possible. Some changes to the way locking is done between the garbage collector and dst_destroy would be necessary. Lets see if the author of the patch can come up with a solution to this. |
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