On 19/04/2012 10:57, NeilBrown wrote:
On Thu, 19 Apr 2012 12:11:43 +0300 Alexander Lyakas<alex.bolshoy@xxxxxxxxx>
wrote:
Hi Neil,
Thanks for the clarification.
However, from your commit message, it stems that during a normal
reboot (without -f -n), writes can still arrive after your reboot
notifier has cleaned the array. In such case, array might be dirty
after reboot. Is that so? If yes, then that's kind of regression.
Why do you think that?
I don't think that is the case.
That's what I had thought too, because in your original message
describing the patch, you wrote:
It seems that with recent kernel, writeback can still be happening
while shutdown is happening, and consequently data can be written
after the md reboot notifier switches all arrays to read-only.
I understand that to mean that someone somewhere has patched the kernel
so that writes (writeback?) can still be happening after the array is
supposed to be read-only. This sounds like a regression to me, though
not one you have created.
Cheers,
John.
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