Xen devel - Dec 2005 - [Patch] Rate-limit timer ISR warning printks

Hi all,

Using a slow serial console with sync_console on SMP leaves me with an
unusable system: it gets into a flood of

Timer ISR/0: Time went backwards: delta=-3566279 cpu_delta=16433721
shadow=2019998373 off=420435384 processed=2444000000
cpu_processed=2424000000
 0: 2424000000
 1: 2444000000

messages which swamps the console and leaves things almost, but not
quite, completely hung.  It is a simple matter to ratelimit these
printks, which completely eliminates the problem for me.

Cheers,
 Stephen



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