x86_64: fix the check in stack_overflow_check

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Impact: make stack overflow debug check and printout narrower

stack_overflow_check() should consider the stack usage of pt_regs, and
thus it could warn us in advance. Additionally, it looks better for
the warning time to start at INITIAL_JIFFIES.

Assuming that rsp gets close to the check point before interrupt
arrives: when interrupt really happens, thread_info will be partly
overrode.

Signed-off-by: jia zhang <jia.zhang2008@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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jia zhang 2008-11-23 09:51:41 +08:00 • committed by Ingo Molnar

parent ca9eed7613

commit 3aeb95d5b7

1 changed files with 4 additions and 3 deletions

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arch/x86/kernel/irq_64.c

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