lkml.org 
[lkml]   [2019]   [Oct]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC PATCH 0/7] xfs: add reflink & dedupe support for fsdax.
On Tue, Oct 08, 2019 at 11:31:44PM -0700, Christoph Hellwig wrote:
> Btw, I just had a chat with Dan last week on this. And he pointed out
> that while this series deals with the read/write path issues of
> reflink on DAX it doesn't deal with the mmap side issue that
> page->mapping and page->index can point back to exactly one file.
>
> I think we want a few xfstests that reflink a file and then use the
> different links using mmap, as that should blow up pretty reliably.

Hmm, you're right, we don't actually have a test that checks the
behavior of mwriting all copies of a shared block. Ok, I'll go write
one.

--D

\
 
 \ /
  Last update: 2019-10-09 19:12    [W:0.117 / U:1.044 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site