[PATCHv2 0/2] *** Detect interrupt storm in softlockup ***

[Bitao Hu <yaoma@linux.alibaba.com>]

I have implemented a low-overhead method for detecting interrupt storm
in softlockup. Please review it, all comments are welcome.

Changes from v1 to v2:

- From Douglas, optimize the memory of cpustats. With the maximum number
of CPUs, that's now this.
2 * 8192 * 4 + 1 * 8192 * 5 * 4 + 1 * 8192 = 237,568 bytes.

- From Liu Song, refactor the code format and add necessary comments. 

- From Douglas, use interrupt counts instead of interrupt time to
determine the cause of softlockup. 

- Remove the cmdline parameter added in PATCHv1.

Bitao Hu (2):
  watchdog/softlockup: low-overhead detection of interrupt storm
  watchdog/softlockup: report the most frequent interrupts

 kernel/watchdog.c | 222 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 222 insertions(+)

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