lkml.org 
[lkml]   [2016]   [Oct]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/6] mm: mark all calls into the vmalloc subsystem as potentially sleeping
On Wed, Oct 19, 2016 at 06:31:12PM +0200, Christoph Hellwig wrote:
> On Wed, Oct 19, 2016 at 08:34:40AM -0700, Andy Lutomirski wrote:
> >
> > It would be quite awkward for a task stack to get freed from a
> > sleepable context, because the obvious sleepable context is the task
> > itself, and it still needs its stack. This was true even in the old
> > regime when task stacks were freed from RCU context.
> >
> > But vfree has a magic automatic deferral mechanism. Couldn't you make
> > the non-deferred case might_sleep()?
>
> But it's only magic from interrupt context..
>
> Chris, does this patch make virtually mapped stack work for you again?

So far, so good. No warns from anyone else.
-Chris

--
Chris Wilson, Intel Open Source Technology Centre

\
 
 \ /
  Last update: 2016-10-19 21:44    [W:0.106 / U:0.044 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site