lkml.org 
[lkml]   [2009]   [Apr]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: btrfs BUG on creating huge sparse file
From
Date
On Wed, 2009-04-29 at 16:21 +0800, Wu Fengguang wrote:
> On Wed, Apr 29, 2009 at 04:16:16PM +0800, Wu Fengguang wrote:
> > On Thu, Apr 09, 2009 at 10:37:39AM -0400, Chris Mason wrote:
> [snip]
> > > PagePrivate is very common. try_to_releasepage failing on a clean page
> > > without the writeback bit set and without dirty/locked buffers will be
> > > pretty rare.
> >
> > Yup. btrfs seems to tag most(if not all) dirty pages with PG_private.
> > While ext4 won't.
>
> Chris, I run into a btrfs BUG() when doing
>
> dd if=/dev/zero of=/b/sparse bs=1k count=1 seek=104857512345
>
> The half created sparse file is
>
> -rw-r--r-- 1 root root 98T 2009-04-29 14:54 /b/sparse
> Or
> -rw-r--r-- 1 root root 107374092641280 2009-04-29 14:54 /b/sparse
>
> Below is the kernel messages. I can test patches you throw at me :-)
>

How big was the FS you were testing this on? It works for me...

-chris




\
 
 \ /
  Last update: 2009-04-29 13:47    [W:0.148 / U:0.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site