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 <mi...@elte.hu> > Signed-off-by: "zhangwei(Jovi)" <jovi.zhang...@huawei.com> > Cc: Steven Rostedt <rost...@goodmis.org> > Cc: Jens Axboe <ax...@kernel.dk> > Cc: Al Viro <v...@zeniv.linux.org.uk> > Cc: Eric Dumazet <eduma...@google.com> > Signed-off-by: Andrew Morton <a...@linux-foundation.org>
I don't think this patch should have Andrew's signed-off-by? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
