[lkml]   [2018]   [Nov]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Sleeping in user_access section
On 11/23/18 3:57 AM, Julien Thierry wrote:
> On x86, the EFLAGS.AC bit is also saved upon exception and I think it is
> cleared upon exception entry so there is implicit exit from the
> user_access mode when taking exception/interrupt.

No, it is restored, not cleared.

In summary: on exceptions, user_access regions are suspended, and on
return the user_access status is resumed.

However, explicitly calling sleeping functions is not supported.


 \ /
  Last update: 2018-11-27 20:07    [W:0.051 / U:8.620 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site