Eric W. Biederman <[email protected]> wrote:
> As for worry about kmallocs do these events happen often?
The worst case would most likely be in a dm multipath configuration where
you could get a burst of N number events (N being equal to the number of
luns times the number of paths that are having an issue).
> I would
> not expect any of them in the normal course of operation for a system.
Yes, the ones that are part of this patch are unexpected events or
recovery of the unexpected event.
> Worst case you handle extra kmallocs with a library function.
> It's not like you are using GFP_ATOMIC.
I was using GFP_ATOMIC as I did not want __GFP_IO as in some testing there
was a case where heavy file system IO was going on and an injected error
event caused the swap device into a temporary queued condition while an
event was trying to be sent. I may need to go back and investigate this
case on recent kernels as it has been a while since I did the test case.
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