On Thu, Jul 30, 2015 at 7:34 PM, Qu Wenruo <quwen...@cn.fujitsu.com> wrote: > > > Hi John, > Thanks for the trace output. You are welcome, thank you for looking at it! > > But it seems that, your root partition is also btrfs, causing a lot of btrfs > trace from your systemd journal. > Oh yes sorry about that. I actually have 3 partition in btrfs, the problematic one being the only big one. > Would you mind re-collecting the ftrace without such logging system caused > btrfs trace? Sure, how would I do that? This is my first time using ftrace. > > BTW, although I'm not quite familiar with ftrace, would you please consider > collect ftrace with function_graph tracer? Sure, how would I do that one as well? (I'll look these up in the meantime, I just want to make sure to not give you something not useful again). > That would help a lot to find which takes the most time. > But it may trace too much things and maybe hard to read. > > Thanks, > Qu
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