Am 28/06/2017 um 14:36 schrieb François Revol:
Le 28/06/2017 à 14:28, Hamish Morrison a écrit :
On Wed, Jun 28, 2017 at 12:46 PM, Axel Dörfler <axeld@xxxxxxxxxxxxxxxx> wrote:
But if there is a flag called CONTIGUOUS_MEMORY, the software that does not
specify it, and rely on the memory block being contiguous, is buggy.
That's the thing - I don't think there is a flag - so it's hard to
tell which users of it actually need contiguous memory and which users
are just using it as a general allocation function.
The problem is kmalloc only allocates contiguous memory, and doesn't
have a flag asking otherwise, which is indeed silly:
https://www.kernel.org/doc/htmldocs/kernel-api/API-kmalloc.html
http://www.makelinux.net/ldd3/chp-8-sect-1
kzalloc is only passing the flags to kmalloc.
Maybe we could try only doing so for GFP_DMA, but that's risky.
