Re: [RFC] [PATCH] kmem_alloc (generic wrapper for kmalloc and vmalloc)

From: Carl-Daniel Hailfinger
Date: Wed Nov 10 2004 - 12:04:46 EST

Jens Axboe wrote:
> On Wed, Nov 10 2004, Robert Love wrote:
>>On Wed, 2004-11-10 at 06:19 +0100, Carl-Daniel Hailfinger wrote:
>>>it seems there is a bunch of drivers which want to allocate memory as
>>>efficiently as possible in a wide range of allocation sizes. XFS and
>>>NTFS seem to be examples. Implement a generic wrapper to reduce code
>>>Functions have the my_ prefixes to avoid name clash with XFS.
>>No, no, no. A good patch would be fixing places where you see this.
>>Code needs to conscientiously decide to use vmalloc over kmalloc. The
>>behavior is different and the choice needs to be explicit.
> Plus, you cannot use vfree() from interrupt context. This patch is a bad
> idea.

OK, so how should I allocate memory for 512 struct loop_device's?
Because of its odd size (304 bytes) it seems that if I use kmalloc
seperately for each struct, I'd waste 208 bytes per allocation. 68%
overhead would be a step backwards. Or am I missing something here?

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at