On Thu, May 31 2007, Ingo Molnar wrote: > > * Ingo Molnar <[EMAIL PROTECTED]> wrote: > > > (i definitely remember having written code for that too, but i cannot > > find that in the archives. hm.) In theory we could avoid _all_ > > fd-bitmap overhead as well and use a per-process list/pool of struct > > file buffers plus a maximum-fd field as the 'non-linear fd allocator' > > (at the price of only deallocating them at process exit time). > > btw., this also allows mostly-lockless fd allocation, which would > probably benefit threaded apps too. (we can just recycle it from a > per-CPU list of cached fds for that process)
See also: http://lkml.org/lkml/2006/6/16/144 which originates from a much simpler patch I did to fix performance regressions in this area for the SLES10 kernel. -- Jens Axboe - 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/