On Tue, 12 Feb 2002, Hugh Dickins wrote:
> On Sat, 9 Feb 2002, Benjamin LaHaise wrote:
> > On Fri, Feb 08, 2002 at 05:46:56PM +0000, Hugh Dickins wrote:
> > > Ben, you probably have an AIO opinion here. Is there a circumstance
> > > in which AIO can unpin a user page at interrupt time, after the
> > > calling task has (exited or) unmapped the page?
> >
> > If the user unmaps the page, then aio is left holding the last reference
> > to the page and will unmap it from irq or bh context (potentially task
> > context too). With networked aio, pages from userspace (anonymous or
> > page cache pages) will be released by the network stack from bh context.
> > Even now, I'm guess that should be possible with the zero copy flag...
Hugh. Are you sure we can free a page from IRQ/BH context with _current_
2.4 ?
Please make sure so.
-
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/
This archive was generated by hypermail 2b29 : Fri Feb 15 2002 - 21:00:57 EST