Re: [PATCH] mtd: Add simple read disturb test
From: Richard Weinberger
Date: Thu Apr 02 2015 - 12:18:44 EST
Am 02.04.2015 um 18:04 schrieb Brian Norris:
> On Thu, Apr 02, 2015 at 04:13:46PM +0200, Richard Weinberger wrote:
>> This simple MTD tests allows the user to see when read disturb happens.
>> By reading blocks over and over it reports flipped bits.
>> Currently it reports only flipped bits of the worst page of a block.
>> If within block X page P1 has 3 bit flips and P6 4, it will report 4.
>> By default every 50th block is read.
> Didn't read through this much yet, but why do we need another in-kernel
> test that coul (AFAICT) be easily replicated in userspace? The same goes
> for several of the other tests, I think, actually. But at least with
> those, we have a history of keeping them around, so it's not too much
> burden .
I've added the test to drivers/mtd/tests/ because it fits into.
As simple as that.
>  Although there are some latent issues in these tests that are still
> getting get worked out (e.g., bad handling of 64-bit casting; too large
> of stacks; uninterruptibility). The latter two would not even exist if
> we were in user space.
uninterruptibility got solved by my "[PATCH] mtd: Make MTD tests cancelable" patch.
But if we want to kill drivers/mtd/tests/ I'll happily help out.
Where shall we move these tests into? mtd-utils?
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