lkml.org 
[lkml]   [2001]   [Sep]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [SMP lock BUG?] Re: Feedback on preemptible kernel patch
Hi!

> > #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....
Pavel
--
Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:03    [W:0.080 / U:0.000 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site