Re: Mysterious CFQ crash and RCU

[Paul Bolle]

> Polling is fine.  Please see attached for a script to poll at 15-second
> intervals.  Please also feel free to adjust, just tell me what you
> adjusted.

0) I have not yet tried this script, but I did have a look at it (to see
what's needed to run it).

1) All debugfs files it polls come from kernel/rcutree_trace.c. That
file is written as a module (and will only be built if
CONFIG_TREE_RCU_TRACE isn't "n"). But in init/Kconfig, the
TREE_RCU_TRACE config entry is set to "def_bool".

2) So shouldn't either the config entry be set to "tristate" or the
module support removed from kernel/rcutree_trace.c?


Paul Bolle

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