Messages in this thread | | | Date | Thu, 12 Jul 2007 16:41:59 -0700 | From | Mike Anderson <> | Subject | Re: [2.6.23 PATCH 14/18] dm: netlink add to core |
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Eric W. Biederman <ebiederm@xmission.com> 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.
-andmike -- Michael Anderson andmike@us.ibm.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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