----- Original Message ----- > On 07/16/2015 09:12 PM, Dave Anderson wrote: > > > > Rabin, > > > > This looks fine to me -- Qiao, can you please ACK this patch? > > > > Thanks, > > Dave > > > > > > ----- Original Message ----- > >> max_buffer is optional in the kernel (depends on the > >> CONFIG_TRACE_MAX_TRACE option). Don't fail if it isn't available. > > > Acked-by: Qiao Nuohan <qiaonuohan@xxxxxxxxxxxxxx> Rabin and Qiao, The patch is queued for crash-7.1.3: https://github.com/crash-utility/crash/commit/9f809b8e2c078be754ff700b0b84152e0cd99466 Dave > > >> --- > >> extensions/trace.c | 14 +++++++++++++- > >> 1 file changed, 13 insertions(+), 1 deletion(-) > >> > >> diff --git a/extensions/trace.c b/extensions/trace.c > >> index 9f81568..c269f4c 100644 > >> --- a/extensions/trace.c > >> +++ b/extensions/trace.c > >> @@ -34,6 +34,10 @@ static int encapsulated_current_trace; > >> * trace_buffer is supported > >> */ > >> static int trace_buffer_available; > >> +/* > >> + * max_buffer is supported > >> + */ > >> +static int max_buffer_available; > >> > >> #define koffset(struct, member) struct##_##member##_offset > >> > >> @@ -163,8 +167,10 @@ static int init_offsets(void) > >> > >> if (trace_buffer_available) { > >> init_offset(trace_array, trace_buffer); > >> - init_offset(trace_array, max_buffer); > >> init_offset(trace_buffer, buffer); > >> + > >> + if (max_buffer_available) > >> + init_offset(trace_array, max_buffer); > >> } else { > >> init_offset(trace_array, buffer); > >> } > >> @@ -448,6 +454,9 @@ out_fail: > >> static int ftrace_int_max_tr_trace(void) > >> { > >> if (trace_buffer_available) { > >> + if (!max_buffer_available) > >> + return 0; > >> + > >> global_max_buffer = global_trace + koffset(trace_array, max_buffer); > >> read_value(max_tr_ring_buffer, global_max_buffer, trace_buffer, > >> buffer); > >> } else { > >> @@ -528,6 +537,9 @@ static int ftrace_init(void) > >> > >> if (MEMBER_EXISTS("trace_array", "trace_buffer")) { > >> trace_buffer_available = 1; > >> + > >> + if (MEMBER_EXISTS("trace_array", "max_buffer")) > >> + max_buffer_available = 1; > >> } else { > >> sym_max_tr_trace = symbol_search("max_tr"); > >> if (sym_max_tr_trace == NULL) > >> -- > >> 1.7.10.4 > >> > >> -- > >> Crash-utility mailing list > >> Crash-utility@xxxxxxxxxx > >> https://www.redhat.com/mailman/listinfo/crash-utility > >> > > . > > > > > -- > Regards > Qiao Nuohan > -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility