Re: [PATCH] tree wide: Use kvfree() than conditional kfree()/vfree()

From: Sergey Senozhatsky
Date: Sun Nov 08 2015 - 00:32:40 EST

On (11/08/15 14:04), Tetsuo Handa wrote:
> Also, we might want to add a helper that does vmalloc() when
> kmalloc() failed because locations that do
> ptr = kmalloc(size, GFP_NOFS);
> if (!ptr)
> ptr = vmalloc(size); /* Wrong because GFP_KERNEL is used implicitly */
> are found.

ext4 does something like that.

void *ext4_kvmalloc(size_t size, gfp_t flags)
void *ret;

ret = kmalloc(size, flags | __GFP_NOWARN);
if (!ret)
ret = __vmalloc(size, flags, PAGE_KERNEL);
return ret;

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