[lkml]   [2007]   [Oct]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Interaction between Xen and XFS: stray RW mappings
On Tue, Oct 23, 2007 at 10:36:41AM +1000, David Chinner wrote:
> > That doesn't mean it is correct.
> Right, but it also points to the fact that it's not causing problems
> from 99.999% of ppl out there.

So you're waiting for someone to take months to debug this again?

> You mean like vmap() could record the pages passed to it in the area->pages
> array,

The page tables contain pointers to the pages anyways. vunmap() has to walk
them. It would not be very difficult to store them in an array during
the walk.

> If we did this, it would probably be best to pass a page release function
> into the vmap or vunmap call - we'd need page_cache_release() called on
> the page rather than __free_page()....

Possible. Normally vmalloc pages should not be in the LRU except yours
so it would be probably fine to just change it.

> The solution belongs behind the vmap/vunmap interface, not in XFS....

You could also just keep the array from map time around yourself.
Then you could do it yourself.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2007-10-23 11:31    [W:0.193 / U:1.892 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site