From: Mel Gorman <mgorman@xxxxxxx> Date: Thu, 10 May 2012 14:54:14 +0100 > It could happen that all !SOCK_MEMALLOC sockets have buffered so > much data that we're over the global rmem limit. This will prevent > SOCK_MEMALLOC buffers from receiving data, which will prevent userspace > from running, which is needed to reduce the buffered data. > > Fix this by exempting the SOCK_MEMALLOC sockets from the rmem limit. > > Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> > Signed-off-by: Mel Gorman <mgorman@xxxxxxx> This introduces an invariant which I am not so sure is enforced. With this change it is absolutely required that once a socket becomes SOCK_MEMALLOC it must never _ever_ lose that attribute. Otherwise we can end up liberating global rmem tokens which we never actually took. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
