search for: available_filter_functions

...;> >> Then it needs to be fixed ASAP! > > OK, I see. At least the two patches included this series > should be fixed. :) > > And more, I need to test all symbols and drills down. OK, what I've found was; - The functions which can be ftraced look good. (see tracing/available_filter_functions) - following functions should not be able to be probed. - memcpy, memset - native_load_sp0 and some other native functions (need to be clear) - restore - trace_graph_return - trace_hardirqs_off_thunk, trace_hardirqs_on_thunk - This list still be not perfect. I just enabled/disabl...

...;> >> Then it needs to be fixed ASAP! > > OK, I see. At least the two patches included this series > should be fixed. :) > > And more, I need to test all symbols and drills down. OK, what I've found was; - The functions which can be ftraced look good. (see tracing/available_filter_functions) - following functions should not be able to be probed. - memcpy, memset - native_load_sp0 and some other native functions (need to be clear) - restore - trace_graph_return - trace_hardirqs_off_thunk, trace_hardirqs_on_thunk - This list still be not perfect. I just enabled/disabl...

?ukasz Daniluk reported that on a RHEL kernel that his machine would lock up after enabling function tracer. I asked him to bisect the functions within available_filter_functions, which he did and it came down to three: _paravirt_nop(), _paravirt_ident_32() and _paravirt_ident_64() It was found that this is only an issue when noreplace-paravirt is added to the kernel command line. This means that those functions are most likely called within critical sections of the fun...

?ukasz Daniluk reported that on a RHEL kernel that his machine would lock up after enabling function tracer. I asked him to bisect the functions within available_filter_functions, which he did and it came down to three: _paravirt_nop(), _paravirt_ident_32() and _paravirt_ident_64() It was found that this is only an issue when noreplace-paravirt is added to the kernel command line. This means that those functions are most likely called within critical sections of the fun...

...OK, I see. At least the two patches included this series >>> should be fixed. :) >>> >>> And more, I need to test all symbols and drills down. >> >> OK, what I've found was; >> - The functions which can be ftraced look good. >> (see tracing/available_filter_functions) >> - following functions should not be able to be probed. >> - memcpy, memset >> - native_load_sp0 and some other native functions (need to be clear) >> - restore >> - trace_graph_return >> - trace_hardirqs_off_thunk, trace_hardirqs_on_thunk >...

...OK, I see. At least the two patches included this series >>> should be fixed. :) >>> >>> And more, I need to test all symbols and drills down. >> >> OK, what I've found was; >> - The functions which can be ftraced look good. >> (see tracing/available_filter_functions) >> - following functions should not be able to be probed. >> - memcpy, memset >> - native_load_sp0 and some other native functions (need to be clear) >> - restore >> - trace_graph_return >> - trace_hardirqs_off_thunk, trace_hardirqs_on_thunk >...

...! > > > > OK, I see. At least the two patches included this series > > should be fixed. :) > > > > And more, I need to test all symbols and drills down. > > OK, what I've found was; > - The functions which can be ftraced look good. > (see tracing/available_filter_functions) > - following functions should not be able to be probed. > - memcpy, memset > - native_load_sp0 and some other native functions (need to be clear) > - restore > - trace_graph_return > - trace_hardirqs_off_thunk, trace_hardirqs_on_thunk > - This list still be...

...included this series > >>> should be fixed. :) > >>> > >>> And more, I need to test all symbols and drills down. > >> > >> OK, what I've found was; > >> - The functions which can be ftraced look good. > >> (see tracing/available_filter_functions) > >> - following functions should not be able to be probed. > >> - memcpy, memset > >> - native_load_sp0 and some other native functions (need to be clear) > >> - restore > >> - trace_graph_return > >> - trace_hardirqs_off_thunk...

...as far back as 2.6.32. Thanks! -- Steve On Wed, 25 May 2016 13:47:26 -0400 Steven Rostedt <rostedt at goodmis.org> wrote: > ?ukasz Daniluk reported that on a RHEL kernel that his machine would lock up > after enabling function tracer. I asked him to bisect the functions within > available_filter_functions, which he did and it came down to three: > > _paravirt_nop(), _paravirt_ident_32() and _paravirt_ident_64() > > It was found that this is only an issue when noreplace-paravirt is added to > the kernel command line. > > This means that those functions are most likely called...

* Masami Hiramatsu <masami.hiramatsu.pt at hitachi.com> wrote: > (2013/11/21 2:36), Frank Ch. Eigler wrote: [ ... ] > > one needs to resort to something like: > > > > # cat /proc/kallsyms | grep ' [tT] ' | while read addr type symbol; do > > perf probe $symbol > > done > > > > then wait for a few hours for that to finish. Then, or

* Masami Hiramatsu <masami.hiramatsu.pt at hitachi.com> wrote: > (2013/11/21 2:36), Frank Ch. Eigler wrote: [ ... ] > > one needs to resort to something like: > > > > # cat /proc/kallsyms | grep ' [tT] ' | while read addr type symbol; do > > perf probe $symbol > > done > > > > then wait for a few hours for that to finish. Then, or