Arguments

Description

kmalloc is the normal method of allocating memory in the kernel.

The flags argument may be one of:

GFP_USER - Allocate memory on behalf of user. May sleep.

GFP_KERNEL - Allocate normal kernel ram. May sleep.

GFP_ATOMIC - Allocation will not sleep. For example, use this inside interrupt handlers.

GFP_HIGHUSER - Allocate pages from high memory.

GFP_NOIO - Do not do any I/O at all while trying to get memory.

GFP_NOFS - Do not make any fs calls while trying to get memory.

Also it is possible to set different flags by OR'ing in one or more of the following additional flags:

__GFP_COLD - Request cache-cold pages instead of trying to return cache-warm pages.

__GFP_DMA - Request memory from the DMA-capable zone.

__GFP_HIGH - This allocation has high priority and may use emergency pools.

__GFP_HIGHMEM - Allocated memory may be from highmem.

__GFP_NOFAIL - Indicate that this allocation is in no way allowed to fail (think twice before using).

__GFP_NORETRY - If memory is not immediately available, then give up at once.

__GFP_NOWARN - If allocation fails, don't issue any warnings.

__GFP_REPEAT - If allocation fails initially, try once more before failing.