On Wed, 10 Jul 2013 11:37:26 +0800 Li Zefan <[email protected]> wrote:
> On 2013/7/10 10:18, zhangwei(Jovi) wrote: > > When I'm using ktap script to tracing all event tracepoints by relay > > transport, without this patch, the system will hang in few seconds. > > > > I found the original patch discussion in 2007. > > http://marc.info/?l=linux-kernel&m=118544794717162&w=2 > > (In that mail thread, the patch didn't fix that problem, but it fix > > the problem I encountered now) > > > > Changed from v1: > > mod timer interval changed from jiffies+1 to HZ/10, as Ingo suggested. > > > > Original patch changelog from Ingo in 2007: > > > > Remove timer calls (!!!) from deep within the tracing infrastructure. > > This was totally bogus code that can cause lockups and worse. > > Poll the buffer every 2 jiffies for now. > > > > Signed-off-by: Ingo Molnar <[email protected]> > > Signed-off-by: "zhangwei(Jovi)" <[email protected]> > > Cc: Steven Rostedt <[email protected]> > > Cc: Jens Axboe <[email protected]> > > Cc: Al Viro <[email protected]> > > Cc: Eric Dumazet <[email protected]> > > Signed-off-by: Andrew Morton <[email protected]> > > I don't think this patch should have Andrew's signed-off-by? I guess not, unless it was taken from -mm, which would be odd, as I have the old version. v1 has been in my tree for a few months - Ingo requested some updates but nothing happened and I have not checked whether v2 addresses his requests. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
