From: Miklos Szeredi <[EMAIL PROTECTED]> Date: Wed, 06 Jun 2007 10:08:29 +0200
> > > > Holding a global mutex over recvmsg() calls under AF_UNIX is pretty > > > > much a non-starter, this will kill performance for multi-threaded > > > > apps. > > > > > > That's an rwsem held for read. It's held for write in unix_gc() only > > > for a short duration, and unix_gc() should only rarely be called. So > > > I don't think there's any performance problem here. > > > > It pulls a non-local cacheline into the local thread, that's extremely > > expensive on SMP. > > OK, here's an updated patch, that uses ->readlock, and passes my > testing. Thanks a lot, I'll review this as soon as possible unless someone else beats me to it :) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
