Re: tests/03r5assemV1 issues

NeilBrown [off-list ref] writes:

On Fri, 06 Jul 2012 11:59:13 +0200 Jes Sorensen [off-list ref]
wrote:

quoted

Hi Neil,

Odd - I see it with
mdadm:  721b662b5b33830090c220bbb04bf1904d4b7eed
kernel: ca24a145573124732152daff105ba68cc9a2b545

I've seen this happen for a while fwiw.

Note the box has a number of external drives with a number of my scratch
raid arrays on it. It shouldn't affect this, but just in case.

The system installed mdadm is a 3.2.3 derivative, but I checked running
with PATH=. as well.

Thanks.
I think I figured out what is happening.

It seems that setting the max_speed down to 1000 is often enough, but not
always.  So we need to set it lower.
But setting max_speed lowers is not effective unless you also set min_speed
lower.  This is the tricky bit that took me way too long to realised.

So with this patch, it is quite reliable.

Hi Neil,

Just tried it out here, and it does indeed solve the problem for
me. Makes sense in the end :)

Looks like we need the same fix in tests/07reshape5intr

Thanks for figuring this out.

Cheers,
Jes