[LTP] [PATCH] lib: tst_device: Allow more control over the device size

[Li Wang]

On Fri, Jul 30, 2021 at 9:32 PM Cyril Hrubis <chrubis@suse.cz> wrote:

> There is actually no reason for lower limit on the device size, and we
> can safely allow the tests to request smaller device than the default
> hardcoded in the library. The backing file is preallocated without
> actually writing to it as long as the underlying filesystem supports it
> so the speedup will be minimal if measurable but we will at least spare
> some space which needs to be reserved on the filesystem which is still a
> good thing.
>
> The test may end up with a device that is bigger than the requsted size
> in a case that a real device was passed to the LTP for the testrun.  So
> tests should be able to cope with that and that's also the reason why
> the turning knob is still called dev_min_size.
>
> Also currently we use the dev_min_size only to increase the device size
> for a few tests so this change is safe and cannot break anything.
>
> CC: Joerg Vehlow <lkml@jv-coder.de>
> Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
>

Reviewed-by: Li Wang <liwang@redhat.com>


-- 
Regards,
Li Wang
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