Messages in this thread | | | Subject | Re: l1tf: Kernel suggests I throw away third of my memory. I'd rather not | From | Vlastimil Babka <> | Date | Wed, 17 Oct 2018 16:13:13 +0200 |
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On 10/17/18 4:08 PM, Andi Kleen wrote: > On Wed, Oct 17, 2018 at 12:56:10PM +0200, Pavel Machek wrote: >> Hi! >> >> 6a012288 suggests I throw away 1GB on RAM. On 3GB system.. that is not >> going to be pleasant. > > Just rebuild your kernel with PAE? I assume your CPU supports it.
I think it is built with PAE or this would kick in:
#if CONFIG_PGTABLE_LEVELS == 2 pr_warn("Kernel not compiled for PAE. No mitigation for L1TF\n"); return; #endif
I.e. no MAX_PA/2 messages.
> This will also give you NX, which if you're really worried > about security is far more important than L1TF. > > If you don't worry about security just ignore. > > -Andi >
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