Re: getcwd does lots of stat'ing

• Next message: Christoph Hellwig: "Re: Announcing CML2, a replacement for the kbuild system"
• Previous message: James Sutherland: "Re: [KBUILD] Re: Announcing CML2, a replacement for the kbuild system"
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

>>>>> Cameron Schaus writes:

> Why does a call to getcwd descend the direcotries until a mount point
> is hit? I noticed this while profiling some code at work (this is
> very expensive on nfs mounted drives). Every directory that it finds,
> it runs lstat on.

> Is this done in the libc implementation of getcwd, or does the kernel
> system call do this? I am running 2.2.14 with Trond's nfsv3 patches
> with the Debian 2.1 distribution.

glibc calls the getcwd syscall if that exists and falls back reading
/proc/self/cwd and then back to lstating the directories (see
sysdeps/unix/sysv/linux/getcwd.c in the glibc sources).

Andreas

-- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.rhein-neckar.de
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

• Next message: Christoph Hellwig: "Re: Announcing CML2, a replacement for the kbuild system"
• Previous message: James Sutherland: "Re: [KBUILD] Re: Announcing CML2, a replacement for the kbuild system"
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b29 : Wed May 31 2000 - 21:00:15 EST