On 2013/7/31 18:01, zhangwei(Jovi) wrote: > From: Ingo Molnar <[email protected]> > > 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 origina patch: > - mod timer interval changed from jiffies+1 to HZ/10, as Ingo suggested. > - mod timer interval changed from HZ/10 to jiffies + HZ/10, suggested > by Dan Carpenter, since mod_timer() takes an offset for interval. > > 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: Dan Carpenter <[email protected]> > Cc: Steven Rostedt <[email protected]> > Cc: Jens Axboe <[email protected]> > Cc: Al Viro <[email protected]> > Cc: Eric Dumazet <[email protected]> > --- Hi Andrew,
How about this patch? this version folded the suggestion from Ingo and Dan. jovi -- 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/
