Re: [SMP lock BUG?] Re: Feedback on preemptible kernel patch

Pavel Machek (
Fri, 14 Sep 2001 09:15:59 +0000


> > #define kmap_atomic(page,idx) ctx_sw_off(); kmap(page);
> > #define kunmap_atomic(page,idx) ctx_sw_on(); kunmap(page);
> >
> No. kmap_atomic is called from interrupt context, and kmap calls
> schedule().
> I thought about the attached patch (completely untested).

is it legal to kmap_atomic(a,b); kmap_atomic(c,d); kunmap_atomic(a,b); ?
If so, your patch may need some ounting....

Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to More majordomo info at Please read the FAQ at