Bug 681876 - btrfs: ENOSPC when df reports lots of space left
Summary: btrfs: ENOSPC when df reports lots of space left
Keywords:
Status: CLOSED NEXTRELEASE
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 14
Hardware: x86_64
OS: Linux
unspecified
high
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-03-03 13:57 UTC by Albert Strasheim
Modified: 2011-08-24 14:54 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-08-24 14:54:26 UTC
Type: ---

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Description Albert Strasheim 2011-03-03 13:57:13 UTC 
Description of problem:

1. make 2 TB btrfs file system

2. make a few levels of directories

3. fill directories with 64 MiB files by doing:

open
fallocate
close

Version-Release number of selected component (if applicable):

kernel-2.6.35.11-83.fc14.x86_64

How reproducible:

Always

Actual results:

df -ah reports:

Filesystem            Size  Used Avail Use%
/dev/mapper/mpathaa   1.9T  1.9T  2.1G 100%

but operations to make more files fail with ENOSPC.
Comment 1 Josh Boyer 2011-08-24 14:54:26 UTC 
ENOSPC handling in btrfs is known to have issues in 2.6.35.  You should try with the f15 or latest f16 kernel.
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