Messages in this thread | | | From | Chris Wilson <> | Subject | Re: [PATCH] ftrace: Allow configuring global trace buffer size (for dump-on-oops) | Date | Tue, 14 Nov 2017 11:28:52 +0000 |
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Quoting Chris Wilson (2017-11-13 13:07:08) > We have recently turned on ftrace-dump-on-oops for i915's CI and an > issue we have encountered is that the trace buffer size greatly exceeds > the pstore capabilities; we get the tail of the oops but not the > introduction. > > Currently the global buffer size is controllable on the cmdline, but at > the request of our CI sysadmin, we would like to add a control to the > Kconfig as well. The rationale being the cmdline carries the temporary > hacks that we want to eradicate, and we want to track the permanent > configuration in .config. > > I have kept the Kconfig option hidden from the user as the default > should suffice for the majority of users; reserving the configuration > for those that eschew the cmdline option.
Odd, by removing the prompt the default value will always override the user value in .config.
I had to restore a prompt "Global ftrace buffer size" if EXPERT to keep it configurable. -Chris
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