On Thu, 10 April 2008 16:13:47 +0200, Arnd Bergmann wrote: > > How much time is spent in the compression code? Would it be helpful > to have a percpu stream and do preempt_disable around it instead > of the mutex? > > That would improve parallelism and cache-locality of the compression, > at the cost of adding a source of latency to preemptible kernels. Several years back (before logfs) I was planning to do just that. It turned out that ipsec doesn't work in such a fashion, because each connection is a stream. And the two block-oriented users, jffs2 and cramfs just weren't worth it. Might be a good idea by now. I guess it should become self-contained code, so that jffs2, cramfs and ubifs can use it as well. Jörn -- Write programs that do one thing and do it well. Write programs to work together. Write programs to handle text streams, because that is a universal interface. -- Doug MacIlroy -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
