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List:       kde-devel
Subject:    Re: Endless modprobe calls logged in KDE 3.4
From:       David Faure <faure () kde ! org>
Date:       2005-02-10 14:07:50
Message-ID: 200502101507.51261.faure () kde ! org
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On Wednesday 09 February 2005 10:24, Kévin Ottens wrote:
> Should I commit it or you'll do it yourself?

Done.

> Maybe try to reactivate the device icons on kdesktop before committing... 
> maybe that's related.
I tried, no difference.

> > But I would like to confirm my suspicion:
> > if I "dcop kded kded unloadModule mediamanager" then the blinking stops!
> > So it's for sure due to LinuxCDPolling.
> 
> Don't forget I have a KDirWatch on fstab and mtab... It should use fam if it's 
> available (IIRC). If it's not the case that's maybe why you're experiencing 
> this blinking.
> The LinuxCDPolling thread doesn't access the hard drives... really.

I had a look and I have to disagree:
if I "strace -p" on famd, it shows that nothing's happening there, it's just waiting.
On the other hand, if I "strace -p" on kded (with mediamanager loaded), I see

gettimeofday({1108044108, 513203}, NULL) = 0
gettimeofday({1108044108, 513394}, NULL) = 0
ioctl(4, FIONREAD, [0])                 = 0
gettimeofday({1108044108, 513741}, NULL) = 0
select(12, [3 4 5 7 10 11], [], [], {0, 498420}) = 0 (Timeout)

appearing twice per second, in sync with the blinking light,
and sometimes it reads from file descriptor 4.
According to /proc, fd 4 is socket:[10126]
Hmm, how do I go from there? Grepping in /proc shows no other socket:[10126].
netstat -anp says
unix  3      [ ]         STREAM     CONNECTED     10126  4184/kdeinit: kded

> You're right, even if HAL seems to spread quickly... So maybe I could (as a 
> last modification) use your proposed hack and disable the linux cd polling by 
> default [...]

If we still have chances to "fix" it, let's do that first.

-- 
David Faure, faure@kde.org, sponsored by Trolltech to work on KDE,
Konqueror (http://www.konqueror.org), and KOffice (http://www.koffice.org).
 
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