Messages in this thread | | | Date | Wed, 9 Dec 2015 14:55:44 +0100 | From | Michal Hocko <> | Subject | Re: m(un)map kmalloc buffers to userspace |
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On Tue 08-12-15 18:25:31, Sebastian Frias wrote: > Hi, > > We are porting a driver from Linux 3.4.39+ to 4.1.13+, CPU is Cortex-A9. > > The driver maps kmalloc'ed memory to user space.
This sounds like a terrible idea to me. Why don't you simply use the page allocator directly? Try to imagine what would happen if you mmaped a kmalloc with a size which is not page aligned? mmaped memory uses whole page granularity. -- Michal Hocko SUSE Labs
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