lkml.org 
[lkml]   [2006]   [Dec]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: fuse, get_user_pages, flush_anon_page, aliasing caches and all that again
From
From: Arjan van de Ven <arjan@infradead.org>
Date: Sun, 31 Dec 2006 10:27:22 +0100

>
> >
> > However, it's not only FUSE which is suffering - direct-IO also doesn't
> > work.
>
> for direct-IO the kernel won't touch the data *at all*... (that's the
> point ;)
>
> is it still an issue then?

It can be an issue with virtual caches if the "I/O" is done
using cpu loads and stores, but we should be handling that
with explicit flushing anyways.

The core of the problem is that ARM doesn't look for the user
mappings for anonymous pages when flush_dcache_page() is invoked.
I think as a temporary fix it could walk the RMAP list and
use that to find the user virtual mappings. Would that work
Russel?
-
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: 2006-12-31 10:51    [W:0.142 / U:0.548 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site