Re: [dm-devel] [4.7.0rc6] Page Allocation Failures with dm-crypt

From: Matthias Dahl
Date: Mon Jul 11 2016 - 09:27:55 EST

Hello Mike...

On 2016-07-11 15:18, Mike Snitzer wrote:

Something must explain the execessive nature of your leak but
it isn't a known issue.

Since I am currently setting up the new machine, all tests were
performed w/ various live cd images (Fedora Rawhide, Gentoo, ...)
and I saw the exact same behavior everywhere.

Have you tried running with kmemleak enabled?

I would have to check if that is enabled on the live images but even if
it is, how would that work? The default interval is 10min. If I fire up
a dd, the memory is full within two seconds or so... and after that, the
OOM killer kicks in and all hell breaks loose unfortunately.

I don't think this is a particular unique issue on my side. You could,
if I am right, easily try a Fedora Rawhide image and reproduce it there
yourself. The only unique point here is my RAID10 which is a Intel Rapid
Storage s/w RAID. I have no clue if this could indeed cause such a "bug"
and how.


Dipl.-Inf. (FH) Matthias Dahl | Software Engineer |
services: custom software [desktop, mobile, web], server administration