lkml.org 
[lkml]   [2001]   [Jun]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Is it useful to support user level drivers
Date
From
> (i.e. counted). An alternative to queuing (user selectable) is to block
> interrupt generation at hardware level in kernel space immediately
> before notification.
>
> I'm missing something?

IRQ 9 shared between user space app and disk. IRQ arrives is disabled and
reported, app wakes up, app wants to page in code, IRQ is disabled, box dies

You have to handle that in kernel space, at least enough to handle the
irq event, ack it and queue the data


-
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 12:55    [W:0.097 / U:0.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site