https://github.com/torvalds/linux
When a journal-less ext4 filesystem is mounted on a read-only block device (blockdev --setro will do), each remount (for other, unrelated, flags, like suid=>nosuid etc) results in a series of scary messages from kernel telling about I/O errors on the device. This is becauese of the following code ext4_remount(): if (sbi->s_journal == NULL) ext4_commit_super(sb, 1); at the end of remount procedure, which forces writing (flushing) of a superblock regardless whenever it is dirty or not, if the filesystem is readonly or not, and whenever the device itself is readonly or not. We only need call ext4_commit_super when the file system had been previously mounted read/write. Thanks to Eric Sandeen for help in diagnosing this issue. Signed-off-By: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
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- v2.6.18-rc2
- v2.6.18-rc1
- v2.6.18
- v2.6.17-rc6
- v2.6.17-rc5
- v2.6.17-rc4
- v2.6.17-rc3
- v2.6.17-rc2
- v2.6.17-rc1
- v2.6.17
- v2.6.16-rc6
- v2.6.16-rc5
- v2.6.16-rc4
- v2.6.16-rc3
- v2.6.16-rc2
- v2.6.16-rc1
- v2.6.16
- v2.6.15-rc7
- v2.6.15-rc6
- v2.6.15-rc5
- v2.6.15-rc4
- v2.6.15-rc3
- v2.6.15-rc2
- v2.6.15-rc1
- v2.6.15
- v2.6.14-rc5
- v2.6.14-rc4
- v2.6.14-rc3
- v2.6.14-rc2
- v2.6.14-rc1
- v2.6.14
- v2.6.13-rc7
- v2.6.13-rc6
- v2.6.13-rc5
- v2.6.13-rc4
- v2.6.13-rc3
- v2.6.13-rc2
- v2.6.13-rc1
- v2.6.13
- v2.6.12-rc6
- v2.6.12-rc5
- v2.6.12-rc4
- v2.6.12-rc3
- v2.6.12-rc2
- v2.6.12
- v2.6.11-tree
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ext4: do not try to write superblock on ro remount w/o journal
File | Mode | Size |
---|---|---|
inject_fault.sh | -rwxr-xr-x | 1001 bytes |
Computing file changes ...