Mario 'BitKoenig' Holbe wrote:
Jens Axboe <[email protected]> wrote:
On Wed, Aug 23 2006, Andi Kleen wrote:
I think I would prefer a stackable driver instead of this hook.
I second this, preferrably a device-mapper target similar to dm-error.
But that makes it more tricky to setup a test, since you have to change
from using /dev/sda (for example) to /dev/stacked-driver.
Do you really think somebody would run such tests on otherwise normally
used devices?
We certainly run this kind of tests on a routine basis - before we ship
a kernel to our installed field, we need to verify that it will handle
disk IO errors correctly.
In our case, the tests are run on a farm of machines that get pxe'ed to
a specific image, tested (usually by sticking in a disk known to be bad
enough to cause reliable errors ;-)) and then we watch to see that the
errors do not cause hangs, etc.
Having a requirement to change our standard image (sda ->
stacked-driver) would not be impossible, but would be less convenient...
ric
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