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[S390] latencytop s390 support.

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Cc: Holger Wolf <wolf@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2008-02-05 16:50:45 +01:00 committed by Martin Schwidefsky
parent 67fe9251bb
commit a3afe70b83
2 changed files with 26 additions and 8 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
arch/s390/Kconfig
View file

@ -16,6 +16,9 @@ config LOCKDEP_SUPPORT
config STACKTRACE_SUPPORT config STACKTRACE_SUPPORT
def_bool y def_bool y
config HAVE_LATENCYTOP_SUPPORT
def_bool y
config RWSEM_GENERIC_SPINLOCK config RWSEM_GENERIC_SPINLOCK
bool bool

23
arch/s390/kernel/stacktrace.c
View file

@ -14,7 +14,8 @@
static unsigned long save_context_stack(struct stack_trace *trace, static unsigned long save_context_stack(struct stack_trace *trace,
unsigned long sp, unsigned long sp,
unsigned long low, unsigned long low,
unsigned long high) unsigned long high,
int savesched)
{ {
struct stack_frame *sf; struct stack_frame *sf;
struct pt_regs *regs; struct pt_regs *regs;
@ -47,10 +48,12 @@ static unsigned long save_context_stack(struct stack_trace *trace,
return sp; return sp;
regs = (struct pt_regs *)sp; regs = (struct pt_regs *)sp;
addr = regs->psw.addr & PSW_ADDR_INSN; addr = regs->psw.addr & PSW_ADDR_INSN;
if (savesched || !in_sched_functions(addr)) {
if (!trace->skip) if (!trace->skip)
trace->entries[trace->nr_entries++] = addr; trace->entries[trace->nr_entries++] = addr;
else else
trace->skip--; trace->skip--;
}
if (trace->nr_entries >= trace->max_entries) if (trace->nr_entries >= trace->max_entries)
return sp; return sp;
low = sp; low = sp;
@ -66,15 +69,27 @@ void save_stack_trace(struct stack_trace *trace)
orig_sp = sp & PSW_ADDR_INSN; orig_sp = sp & PSW_ADDR_INSN;
new_sp = save_context_stack(trace, orig_sp, new_sp = save_context_stack(trace, orig_sp,
S390_lowcore.panic_stack - PAGE_SIZE, S390_lowcore.panic_stack - PAGE_SIZE,
S390_lowcore.panic_stack); S390_lowcore.panic_stack, 1);
if (new_sp != orig_sp) if (new_sp != orig_sp)
return; return;
new_sp = save_context_stack(trace, new_sp, new_sp = save_context_stack(trace, new_sp,
S390_lowcore.async_stack - ASYNC_SIZE, S390_lowcore.async_stack - ASYNC_SIZE,
S390_lowcore.async_stack); S390_lowcore.async_stack, 1);
if (new_sp != orig_sp) if (new_sp != orig_sp)
return; return;
save_context_stack(trace, new_sp, save_context_stack(trace, new_sp,
S390_lowcore.thread_info, S390_lowcore.thread_info,
S390_lowcore.thread_info + THREAD_SIZE); S390_lowcore.thread_info + THREAD_SIZE, 1);
}
void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
{
unsigned long sp, low, high;
sp = tsk->thread.ksp & PSW_ADDR_INSN;
low = (unsigned long) task_stack_page(tsk);
high = (unsigned long) task_pt_regs(tsk);
save_context_stack(trace, sp, low, high, 0);
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = ULONG_MAX;
} }