Hi Atish, I can take out some time to take a look at it together, if anyone here fixes it or has ideas, please share the information, thanks.
On Sun, Oct 4, 2020 at 1:33 AM Atish Patra <ati...@atishpatra.org> wrote: > > Hi Alan and Zong, > I initially suspected ftrace is broken between v5.6 & v5.7 as Kolin pointed > out. > I couldn't find any reason how the HSM patch is related. Zong's ftrace > patching code was also merged in that release. > However, I was able to reproduce the issue in the older kernel(v5.4) > as well on both Qemu & Unleashed hardware. > Here are the steps: > > mount -t debugfs none /sys/kernel/debug/ > cd /sys/kernel/debug/tracing > echo function_graph > current_tracer > echo function > current_tracer > > It works for the first time with function_graph but writing any other > tracer crashes immediately. > Can you take a look to check if the bug is in ftrace infrastructure code ? > > On Mon, Sep 28, 2020 at 10:25 AM Atish Patra <atish.pa...@wdc.com> wrote: > > > > On Mon, 2020-09-28 at 11:13 -0400, Steven Rostedt wrote: > > > On Sat, 26 Sep 2020 22:02:35 +0000 > > > bugzilla-dae...@bugzilla.kernel.org wrote: > > > > > > > https://bugzilla.kernel.org/show_bug.cgi?id=209317 > > > > > > > > --- Comment #4 from Colin Ian King (colin.k...@canonical.com) --- > > > > Issue still in 5.9-rc6 > > > > > > > > > > Atish, > > > > > > As the issues bisects down to your commit, care to take a look at > > > this. > > > (And take ownership of this bug) > > > > > > > Yes. I am already looking into this. Colin informed me about the bug > > over the weekend. > > > > I couldn't change the ownership as I am not part of the editbugs group. > > I have sent an email to helpd...@kernel.org for access. > > > > > -- Steve > > > > -- > > Regards, > > Atish > > _______________________________________________ > > linux-riscv mailing list > > linux-ri...@lists.infradead.org > > http://lists.infradead.org/mailman/listinfo/linux-riscv > > > > -- > Regards, > Atish
