lkml.org 
[lkml]   [2007]   [May]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/2] AFS: Implement shared-writable mmap
Andrew Morton wrote:
> On Tue, 15 May 2007 16:52:31 +0100
> David Howells <dhowells@redhat.com> wrote:
>
>
>>Implement shared-writable mmap for AFS.
>
>
> This blows up in -mm:
>
> fs/afs/file.c:59: error: 'filemap_nopage' undeclared here (not in a function)
> fs/afs/file.c:60: error: unknown field 'populate' specified in initializer
> fs/afs/file.c:60: error: 'filemap_populate' undeclared here (not in a function)
>
> because Nick went and renamed half the VM and deleted the other half.

And page_mkwrite is next ;)


> I need to work out what to do with
>
> mm-fix-fault-vs-invalidate-race-for-linear-mappings.patch
> mm-merge-populate-and-nopage-into-fault-fixes-nonlinear.patch
> mm-merge-populate-and-nopage-into-fault-fixes-nonlinear-doc-fix.patch
> mm-merge-populate-and-nopage-into-fault-fixes-nonlinear-fix.patch
> mm-merge-nopfn-into-fault.patch
> convert-hugetlbfs-to-use-vm_ops-fault.patch
> mm-remove-legacy-cruft.patch
> mm-debug-check-for-the-fault-vs-invalidate-race.patch
> mm-fix-clear_page_dirty_for_io-vs-fault-race.patch
>
> Probably merge them, I guess. Hugh had concerns, I think over small
> additional overhead from the lock_page()?

Yes he did. It seems to only be noticable in microbenchmarks. In my opinion
not enough to withhold pagecache corruption bug fixes.

Still, I have some lock_page speedup work that eliminates that regression
anyway.

However, Hugh hasn't exactly said yes or no yet...

--
SUSE Labs, Novell Inc.
-
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: 2007-05-16 02:45    [W:0.077 / U:0.548 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site