Am 09.02.2018 um 19:19 schrieb Tom St Denis:
On 09/02/18 01:17 PM, Christian König wrote:
Am 09.02.2018 um 18:28 schrieb Tom St Denis:
On 09/02/18 12:27 PM, Tom St Denis wrote:
From: Christian König <ckoenig.leichtzumerken@xxxxxxxxx>
Oops, I'll remove this from the commit message before pushing :-)
I did give you credit below though.
The patch before this one isn't merged yet because I'm still not sure
if that works under all circumstances or not.
Could you give it some extended testing? Especially if it work with
eviction.
I supposed there is a race on the kmap'ed memory which is why I added
a ptr check. Not perfect but since it's a debugfs entry probably
better than it needs to be.
I think you can drop that, kmap can only return NULL on 32bit systems
when we ran out of vmap area and then you can basically call panic() as
well.
The question is if setting page->mapping during allocation has some
undesired side effect.
Christian.
I'll give it a try on some live traffic next.
Cheers,
Tom
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