On 05/26/2016 09:24 AM, Yishai Hadas wrote:
On 5/25/2016 6:58 PM, Chuck Lever wrote:
When debugging is disabled, kzalloc returns page-aligned
addresses:
Is it defined some where that regular kzalloc/kmalloc guaranties to
return a page-aligned address as you see in your testing ? if so the
debug mode should behave the same. Otherwise we can consider using any
flag allocation that can force that if such exists.
Let's get other people's input here.
My understanding is that the fact that k[mz]alloc() returns a
page-aligned buffer if the allocation size is > PAGE_SIZE / 2 is a side
effect of the implementation and not something callers of that function
should rely on. I think the only assumption k[mz]alloc() callers should
rely on is that the allocated memory respects ARCH_KMALLOC_MINALIGN.
Bart.
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