Re: [PATCH] KVM: nVMX: Don't return error on nested bitmap memory allocation failure

[Jan Kiszka]

Am 2015-04-28 um 21:55 schrieb Bandan Das:
> 
> If get_free_page() fails for nested bitmap area, it's evident that
> we are gonna get screwed anyway but returning failure because we failed
> allocating memory for a nested structure seems like an unnecessary big
> hammer. Also, save the call for later; after we are done with other
> non-nested allocations.

Frankly, I prefer failures over automatic degradations. And, as you
noted, the whole system will probably explode anyway if allocation of a
single page already fails. So what does this buy us?

What could makes sense is making the allocation of the vmread/write
bitmap depend on enable_shadow_vmcs, and that again depend on nested.

Jan

-- 
Siemens AG, Corporate Technology, CT RTC ITP SES-DE
Corporate Competence Center Embedded Linux
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/