Messages in this thread | | | Date | Thu, 22 Jul 2021 10:43:44 -0400 | From | "Theodore Ts'o" <> | Subject | Re: [PATCH] mm: Make kvmalloc refuse to allocate more than 2GB |
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On Wed, Jul 21, 2021 at 07:41:31PM +0100, Matthew Wilcox (Oracle) wrote: > It's generally dangerous to allocate such large quantities of memory > within the kernel owing to our propensity to use 'int' to represent > a length. If somebody really needs it, we can add a kvmalloc_large() > later, but let's default to "You can't allocate that much memory".
If we really need it, maybe we can add a GFP_LARGE_ALLOC to allow allocations larger than 2GB later on? I can't quite see why that would ever be needed, but that's probably a failure of my imagination. :-)
- Ted
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