Messages in this thread | | | Subject | Re: [bug report][stable] perf probe: failed to add events | From | Joseph Qi <> | Date | Wed, 27 Feb 2019 09:53:10 +0800 |
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On 19/2/26 21:08, Greg KH wrote: > On Tue, Feb 26, 2019 at 08:32:34PM +0800, Joseph Qi wrote: >> >> >> On 19/2/26 17:05, Greg KH wrote: >>> On Tue, Feb 26, 2019 at 03:31:14PM +0800, Joseph Qi wrote: >>>> Hi, >>>> >>>> I'm using kernel v4.19.24 and have found that there is an issue when >>>> using perf probe to define a new dynamic tracepoint. >>>> >>>> $ perf probe -a handle_mm_fault >>>> Failed to write event: Numerical result out of range >>>> Error: Failed to add events. >>>> >>>> I've also tried kernel v4.20, and it can pass. >>> >>> Ick, has this ever worked on the 4.19 stable tree? If so, any chance >>> you can run 'git bisect' to find the offending commit? >>> >> >From my test, v4.19.0 also has this issue. >> Bisect locates that it is introduced by commit bf904d2762ee >> "x86/pti/64: Remove the SYSCALL64 entry trampoline". > > But that commit was in 4.20, not 4.19. So if this never worked, it's > not a regression? > > confused, Oops, my fault. The first bad commit is: d83212d5dd67 kallsyms, x86: Export addresses of PTI entry trampolines
It is between v4.18 and v4.19.
> > greg k-h >
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