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55

answers:

1
Q: 

Kernel - Finding written block numbers

Is there any way in the kernel to get a list of blocks that have been physically written to and the order in which they were written?

+2  A: 

Looks like blktrace can produce this information.

Eric Seppanen  2010-04-02 15:18:24
+1, though it does get a little flakey when dealing with device mapper and write barriers (or at least it did mid last year when I was using it) .. to discover that device mapper had issues with write barriers in certain situations.
Tim Post  2010-04-02 15:21:58
I'm actually trying to find a way to do this in the kernel programmatically. I want to get block numbers as they are written to from within the linux kernel source code.
SpdStr  2010-04-10 16:41:15

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