On Wed, Mar 16, 2016 at 01:02:13PM -0400, Chris Metcalf wrote: > When doing an nmi backtrace of many cores, most of which are idle, > the output is a little overwhelming and very uninformative. Suppress > messages for cpus that are idling when they are interrupted and just > emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN".
This is still 100+ lines on a modern system, but better than the many many thousands it would otherwise generate. > We do this by grouping all the cpuidle code together into a new > .cpuidle.text section, and then checking the address of the > interrupted PC to see if it lies within that section. > > Signed-off-by: Chris Metcalf <cmetc...@mellanox.com> Acked-by: Peter Zijlstra (Intel) <pet...@infradead.org> Tested-by: Peter Zijlstra (Intel) <pet...@infradead.org> Please Cc Rafael on the next posting.
