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Subject: Re: [hwloc-devel] hwloc 1.1 rc2 make check fails on SLES10SP1 on PPC64
From: Christopher Samuel (samuel_at_[hidden])
Date: 2010-11-21 14:34:35


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On 22/11/10 06:12, Brice Goglin wrote:

> You might want to add some printf in hwloc_opendir like I did with
> hwloc_access in my debug patch.

In look_powerpc_device_tree() I did similar and found that it
never proceeds past this loop:

    if (('.' == dirent->d_name[0]) || (0 == (dirent->d_type & DT_DIR)))
      continue;

Adding some debugging to print the name and type and whether
they were used or skipped I see that when it fails the
dirent->d_type is always '0', but when it works it's '4'.

The manual page for readdir(3) says:

# Currently, only some file systems (among them: Btrfs,
# ext2, ext3, and ext4) have full support returning the file
# type in d_type. All applications must properly handle
# a return of DT_UNKNOWN.

So I'm guessing that reiserfs and GPFS (both of which are
available on this PPC64 box) are returning DT_UNKNOWN (0).

So the above loop will need to catch that and, if it is
DT_UNKNOWN, do a stat or lstat on the entry to find out
what it is. :-(

cheers,
Chris
- --
 Christopher Samuel - Senior Systems Administrator
 VLSCI - Victorian Life Sciences Computational Initiative
 Email: samuel_at_[hidden] Phone: +61 (0)3 903 55545
         http://www.vlsci.unimelb.edu.au/

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