Commit 40d17a22 authored Sep 14, 2014 by Matt Wagantall Committed by Prasad Sodagudi Jul 06, 2017

arm64: Don't call dump_mem() on stack memory during __die()



With multiple CPUs online, these memory dumps may consume a very
large amount of log buffer space, pushing out useful information.

Drop the call to dump_mem() for stack memory. The actual string-
formatted call stack will still be printed, which should be sufficient
for identifying the context of a panic. Stack memory can be collected
from full memory ramdumps if needed.

Change-Id: I2d08b49217b3838d3d3e7f8deceb937bb90ffaf7
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
Signed-off-by: Kyle Yan <kyan@codeaurora.org>
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>

parent 00d37423

arch/arm64/kernel/traps.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -257,8 +257,6 @@ static int __die(const char str, int err, struct pt_regs regs)
		end_of_stack(tsk));

		if (!user_mode(regs)) {
		dump_mem(KERN_EMERG, "Stack: ", regs->sp,
		THREAD_SIZE + (unsigned long)task_stack_page(tsk));
		dump_backtrace(regs, tsk);
		dump_instr(KERN_EMERG, regs);
		}