[lkml]   [2007]   [Mar]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [patch 4/6] mm: merge populate and nopage into fault (fixes nonlinear)
On Wed, 7 Mar 2007 09:27:55 +0100 Ingo Molnar <> wrote:
>> btw., if we decide that nonlinear isnt worth the continuing maintainance
>> pain, we could internally implement/emulate sys_remap_file_pages() via a
>> call to mremap() and essentially deprecate it, without breaking the ABI
>> - and remove all the nonlinear code. (This would split fremap areas into
>> separate vmas)

On Wed, Mar 07, 2007 at 12:35:20AM -0800, Andrew Morton wrote:
> I'm rather regretting having merged it - I don't think it has been used for
> much.
> Paolo's UML speedup patches might use nonlinear though.

Guess what major real-life application not only uses nonlinear daily
but would even be very happy to see it extended with non-vma-creating
protections and more? It's not terribly typical for things to be
truncated while remap_file_pages() is doing its work, though it's been
proposed as a method of dynamism. It won't stress remap_file_pages() vs.
truncate() in any meaningful way, though, as userspace will be rather
diligent about clearing in-use data out of the file offset range to be
truncated away anyway, and all that via O_DIRECT.

-- wli
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: 2007-03-07 10:33    [W:0.130 / U:1.032 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site