Re: Random panic in load_balance() with 3.16-rc

From: Frank Ch. Eigler
Date: Mon Jul 28 2014 - 08:28:39 EST

torvalds wrote:

> [...]
> Actually, I prefer my patch that did it with cc-option checking, and
> does it unconditionally.
> Because if we do it even for non-debug builds - where it ostensibly
> shouldn't matter - we then have that GCC_COMPARE_DEBUG thing working
> regardless of configuration.

Please note that the data produced by "-g -fvar-tracking" is consumed
by tools like systemtap, perf, crash, and makes a significant
difference to the observability of debug AND non-debug kernels. (The
presence of compiled-in DEBUG_* self-checking code is orthogonal to
kernel observability via debuginfo.) Please consider only disabling
var-tracking optionally/temporarily to work around this already-fixed
compiler bug, but not losing high-quality dwarf data permanently.

- FChE
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