On Thu, Nov 27, 2008 at 12:32:24AM +0100, Eric Dumazet wrote: > new_inode() dirties a contended cache line to get inode numbers. > > Solve this problem by providing to each cpu a per_cpu variable, > feeded by the shared last_ino, but once every 1024 allocations. > > This reduce contention on the shared last_ino. > > Note : last_ino_get() method must be called with preemption > disabled on SMP.
Looks a little clumsy. One idea might be to have a special slab for synthetic inodes using new_inode and only assign it on the first allocation and after that re-use it. -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
