lkml.org 
[lkml]   [2004]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Atomic operation for physically moving a page (for memory defragmentation)
From
Date
On Wed, 2004-06-23 at 04:59, Hirokazu Takahashi wrote:
> We should know that many part of kernel code will access the page
> without holding a lock_page(). The lock_page() can't block them.

No, but it will block them from establishing a new PTE to the page. You
need to:

1. make sure no new PTEs can be established to the page
2. make sure there are no valid PTEs to the page.
3. do the move

My suggestion relates to 1, only.

-- Dave

-
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 14:04    [from the cache]
©2003-2011 Jasper Spaans