GFP_XXX semantics (was: Re: [PATCH] 2.2.1{3,4,5} VM fix)

From: Ingo Oeser (ingo.oeser@informatik.tu-chemnitz.de)
Date: Mon Jan 24 2000 - 08:21:36 EST

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On Sat, 22 Jan 2000, Andrea Arcangeli wrote:

[GFP-Mask semantics discussion]

ok, once we are about it here, could you please explain the
_exact_ semantics for the GFP_XXX constants?

GFP_BUFFER
GFP_ATOMIC
GFP_BIGUSER
GFP_USER
GFP_KERNEL
GFP_NFS
GFP_KSWAPD

So which steps are tried to allocate these pages (freeing
process, freeing globally, waiting, failing, kswapd-wakeup)?

Because it is not easy to decide from a driver writers point of
view, which one to use for which requests :(

Thanks and Regards

Ingo Oeser

-- Feel the power of the penguin - run linux@your.pc <esc>:x

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