Messages in this thread | | | Date | Mon, 11 Jul 2016 10:31:22 +0200 | From | Matthias Dahl <> | Subject | Re: [4.7.0rc6] Page Allocation Failures with dm-crypt |
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Hello,
I made a few more tests and here my observations:
- kernels 4.4.8 and 4.5.5 show the same behavior
- the moment dd starts, memory usage spikes rapidly and within a just a few seconds has filled up all 32 GiB of RAM
- dd w/ direct i/o works just fine
- mkfs.ext4 unfortunately shows the same behavior as dd w/o direct i/o and such makes creation of an ext4 fs on dm-crypt a game of luck
(much more exposed so with e2fsprogs 1.43.1)
I am kind of puzzled that this bug has seemingly gone so long unnoticed since it is rather severe and makes dm-crypt unusable to a certain degree for fs encryption (or at least the initial creation of the fs). Am I missing something here or doing something terribly stupid?
With Kind Regards from Germany Matthias
-- Dipl.-Inf. (FH) Matthias Dahl | Software Engineer | binary-island.eu services: custom software [desktop, mobile, web], server administration
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