From: James Bottomley <James.Bottomley@steeleye.com>
Date: Tue, 14 Jan 2003 10:30:15 -0500
A GFP_KERNEL request is safely implemented as GFP_ATOMIC as long as the caller
checks return for NULL. for dma_alloc_coherent return checking is a
requirement because the system may return NULL anyway if it is out of mappings
even with a GFP_KERNEL flag.
Now what about the corollary, a platform that needs
to sleep to setup the cpu mapings in a race-free manner?
It could not ever honor GFP_ATOMIC in that case.
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This archive was generated by hypermail 2b29 : Wed Jan 15 2003 - 22:00:50 EST