Messages in this thread | | | Date | Mon, 23 Oct 2006 04:11:45 -0700 (PDT) | From | Giridhar Pemmasani <> | Subject | Re: __vmalloc with GFP_ATOMIC causes 'sleeping from invalid context' |
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--- Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> You are not allowed to call vmalloc in atomic context, especially in > interrupt paths. Vmalloc has to do TLB handling work and that can > involve cross calls and other stuff that isn't IRQ friendly on all > platforms.
This has been discussed before:
http://marc.theaimsgroup.com/?l=linux-kernel&m=114831100404677&w=2
The problem is not with calling vmalloc in atomic context, but __vmalloc, which can be. The proposed patch makes sure __vmalloc is not supposed to be called in interrupt context.
Giri
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