[rrd-developers] rrdtool 1.3.8: RRDs::update do no update mtime RHEL 5.1 (Tikanga) ??

[Bernhard Reutner-Fischer]

On Tue, Oct 27, 2009 at 12:04:29PM +0100, Ole Bj�rn Hessen wrote:
>
>Hello,
>
>I've compiled rrdtool 1.3.8 on an Linux RHEL 5.1 (Tikanga) kernel
>version 2.6.18-92.1.18.el5 out of the box using only the --prefix
>option.

>There are no fancy mount options - just a simple ext3 rw.
>
>    batch-rrd4(root) ~ 724# mount | grep batch-rrd4
>    /dev/mapper/vg00-rrd on /export/batch-rrd4 type ext3 (rw)
>    /export/batch-rrd4 on /local/net/mnt/batch-rrd4 type none (rw,bind)
>
>Is this a simple linux bug on an RHEL 5.1 "old kernel" ?

This is a known bug on (old) redhat kernels, but configure should have
detected this bug and enabled a workaround. See (just a guess):
$ grep -A5 -B5 mmap config.log

It should show a probe for buggy mmap behaviour not updating mtime..

PS: IIRC 1.3.9 was released recently and contains some bugfixes, so i
recommend you use that if you compile it anyway.

HTH,