Hylafax on FreeBSD 10 and 100% CPU

[Daren]

On 02/07/2014 23:24, Konstantin Belousov wrote:
> On Wed, Jul 02, 2014 at 10:35:16AM +0100, Daren wrote:
>> Hi
>>
>> I've tried installing Hylafax from ports on fresh FreeBSD 10.  We
>> previously had it running on an 8.2 system without issue.
>>
>> After starting faxgetty creeps up to and stays on 100% cpu.  I did find
>> a previous PR for this
>> (https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=166071) which has the
>> status of resolved fixed although people have requested it be re-opened
>> as the problem is still occurring for them as well.
>>
>> I can add another comment to this if it helps get it noticed again, but
>> my knowledge with C etc is non-existent to be able to help with it,
>> although searching has come up with a similar/same issue on dragonflybsd
>> (http://bugs.dragonflybsd.org/issues/2028)
>>
>> Does anyone know if this is being looked at?
>>
> 
> I once looked at the source code of the program, and the ktrace reports
> in the mentioned PR 166071 are consistent with what I remember I saw in
> code, as well as what was discussed at that time.
> 
> If you look at the kdump, you note the series of read(2) syscalls on the
> same FIFO, which return 0, the indicator of the EOF.  AFAIR, the Hylafax
> code does  not check for the EOF condition and just spins trying to
> read more data.  Select(2) returns the fd for EOF'ed FIFO ready, because
> the read(2) indeed does not block at EOF.
> 
> My decision at that time was that the issue is the program bug.
> I do not use the program, and cannot set it up locally to even try
> coding the fix.
> 

Thanks for the answer.  Unfortunately I know nothing about these sorts
of things so it doesn't mean much to me!

I'll try posting to the hylafax list with this, but I'm sure I came
across this previously mentioned to them on a search and they made out
it was an OS bug - although now I cannot find it again.

Cheers
Daren