Re: to make vmalloc()/vfree() one needs to...

Manfred Spraul (manfreds@colorfullife.com)
Fri, 10 Dec 1999 17:36:47 +0100

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Tigran Aivazian wrote:
> b) drop the spinlock and rediscover position in the vmlist after
> put_user() (i.e. assuming that we *may* have slept)
>
> Looks like kmap() can only map a (single) page so it is not good enough
> for vread(). Is this true?
>
vread() is only called from drivers/char/mem.c, ie it's not time
critical.

I would either _always_ loop, or use a short (eg 64) byte temporary
buffer on the stack.

-- Manfred

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Maybe in reply to: Tigran Aivazian: "to make vmalloc()/vfree() one needs to..."