[openib-general] add SIGUSR1 to reopen osm.log

[Hal Rosenstock]

On Sun, 2007-01-07 at 21:37, Sasha Khapyorsky wrote: 
> On 13:43 Mon 20 Nov     , Hal Rosenstock wrote:
> > On Thu, 2006-11-16 at 20:53, Ira Weiny wrote:
> > > Our sysadmins have been rotating OpenSM's osm.log file and then restarting
> > > OpenSM.  As this is a less than optimal solution if you have jobs running on
> > > the system, I wrote this patch (against OFED 1.1) which adds a handler for
> > > SIGUSR1 that reopens OpenSM's log file without a restart.
> > 
> > This is a good idea to incorporate into OpenSM.
> > 
> > Any objections if this is bundled with SIGHUP handling rather than
> > SIGUSR1 which is not backward compatible as Sasha indicated ?
> 
> Actually looking more at this I noticed that SIGUSR* signals are not
> used anymore with linuxthread couple of years (since kernel 2.1.xx,
> where RT signals support was introduced).

Yes, that's what I saw too.

>  So I think it is not real
> issue today - some #ifdef should be sufficient.
> 
> I reviewed and tested the original patch (it is appliable very well) and
> have some fixes/improvements. Two incremental patches are followng.

Thanks!

-- Hal

> Sasha