On Mon, 4 Jun 2007 06:35:16 -0700 (PDT)
Davide Libenzi <email@example.com> wrote:
I actually read your patches and spent time to see the pros and cons.
If you dont need reviewers, please dont post your patches on lkml.
If I am not mistaken, you added a test in fget()/fget_light(), which is a known hot point for said huge processes.
fget() dont need to access the bitmap at all. Using fd_slots means less (50%) file pointers per cache line.
On my machines, there is a ratio of 100/1 in cpu time for fget(),fget_light() against get_unused_fd().