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[PATCH] x86: Compress stack unwinder output 

The unwinder has some extra newlines, which eat up loads of screen
space when it spews. (See https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=137900
for a nasty example).

warning_symbol-> and warning-> already printk a newline, so don't add one
in the strings passed to them.

[AK: redone for new code]

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Andi Kleen 2006-12-07 02:14:00 +01:00 committed by Andi Kleen
parent b615ebdac9
commit dd315df176
2 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/i386/kernel/traps.c
View File

@ -202,22 +202,22 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
if (unw_ret > 0) { if (unw_ret > 0) {
if (call_trace == 1 && !arch_unw_user_mode(&info)) { if (call_trace == 1 && !arch_unw_user_mode(&info)) {
ops->warning_symbol(data, ops->warning_symbol(data,
"DWARF2 unwinder stuck at %s\n", "DWARF2 unwinder stuck at %s",
UNW_PC(&info)); UNW_PC(&info));
if (UNW_SP(&info) >= PAGE_OFFSET) { if (UNW_SP(&info) >= PAGE_OFFSET) {
MSG("Leftover inexact backtrace:\n"); MSG("Leftover inexact backtrace:");
stack = (void *)UNW_SP(&info); stack = (void *)UNW_SP(&info);
if (!stack) if (!stack)
return; return;
ebp = UNW_FP(&info); ebp = UNW_FP(&info);
} else } else
MSG("Full inexact backtrace again:\n"); MSG("Full inexact backtrace again:");
} else if (call_trace >= 1) } else if (call_trace >= 1)
return; return;
else else
MSG("Full inexact backtrace again:\n"); MSG("Full inexact backtrace again:");
} else } else
MSG("Inexact backtrace:\n"); MSG("Inexact backtrace:");
} }
if (!stack) { if (!stack) {
unsigned long dummy; unsigned long dummy;

8
arch/x86_64/kernel/traps.c
View File

@ -280,7 +280,7 @@ void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
if (unw_ret > 0) { if (unw_ret > 0) {
if (call_trace == 1 && !arch_unw_user_mode(&info)) { if (call_trace == 1 && !arch_unw_user_mode(&info)) {
ops->warning_symbol(data, ops->warning_symbol(data,
"DWARF2 unwinder stuck at %s\n", "DWARF2 unwinder stuck at %s",
UNW_PC(&info)); UNW_PC(&info));
if ((long)UNW_SP(&info) < 0) { if ((long)UNW_SP(&info) < 0) {
MSG("Leftover inexact backtrace:"); MSG("Leftover inexact backtrace:");
@ -288,13 +288,13 @@ void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
if (!stack) if (!stack)
return; return;
} else } else
MSG("Full inexact backtrace again:\n"); MSG("Full inexact backtrace again:");
} else if (call_trace >= 1) } else if (call_trace >= 1)
return; return;
else else
MSG("Full inexact backtrace again:\n"); MSG("Full inexact backtrace again:");
} else } else
MSG("Inexact backtrace:\n"); MSG("Inexact backtrace:");
} }
if (!stack) { if (!stack) {
unsigned long dummy; unsigned long dummy;