Bug#764204: apt-cache calls fcntl() on 65536 FDs

[Julian Andres Klode <jak@debian.org>]

On Mon, Oct 6, 2014 at 12:34 PM, martin f krafft <madduck@debian.org> wrote:
> Package: apt
> Version: 1.0.9.2
> Severity: normal
>
> Wondering why apt-cache show takes 3 seconds to run, I used strace
> and found the following:
>
> 21497 12:30:35.549259 getrlimit(RLIMIT_NOFILE, {rlim_cur=64*1024, rlim_max=64*1024}) = 0
> 21497 12:30:35.549333 fcntl(3, F_SETFD, FD_CLOEXEC) = 0
> […]
> 21498 12:30:38.760534 fcntl(65535, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
> 21498 12:30:38.760545 getrlimit(RLIMIT_NOFILE, {rlim_cur=64*1024, rlim_max=64*1024}) = 0
>
> Is it really necessary to close 64k file descriptors?


True. It would save time to scan /proc/self/fds and only do this for
the fds listed there.

-- 
Julian Andres Klode  - Debian Developer, Ubuntu Member

See http://wiki.debian.org/JulianAndresKlode and http://jak-linux.org/.