Messages in this thread | | | Date | Mon, 6 Aug 2018 15:37:47 +0200 | From | Jiri Olsa <> | Subject | Re: [PATCH 2/2] perf/hw_breakpoint: Modify breakpoint even if the new attr has disabled set |
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On Mon, Aug 06, 2018 at 03:07:31PM +0200, Oleg Nesterov wrote: > On 08/06, Oleg Nesterov wrote: > > > > But, with or without this fix, shouldn't we set .disabled = 1 if modify_() fails? > > IIUC this doesn't matter, bp->attr.disabled is not really used anyway, but looks a > > bit confusing. > > I am looking at another caller perf_event_modify_breakpoint(). It too doesn't set > attr.disabled = 1 on failure, it does _perf_event_enable() instead so attr.disabled > should be correct. > > But this looks wrong. If modify_user_hw_breakpoint_check() paths fails after > arch_validate_hwbkpt_settings() was called, then we can not simply restore
hum, arch_validate_hwbkpt_settings was removed recently.. r u checking the last sources?
jirka
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