buggy timer handler and jiffies increment

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Hello,

If a timer handler (added using add_timer) takes very long (due to a
bug)
to execute will that affect other handlers registered with the timer
subsytem? i.e. will other handlers (which are yet to expire) be called
very LATE, after their timer-count expire?

And related to that is increment of "jiffies" variable. Will a buggy
timer handler cause jiffies to be incremented late (hence incorrectly)?

Thanks in Advance
A.

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