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Old 05-07-2013, 06:19 PM   #1
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Registered: Jun 2012
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ext4_da_writepages: jbd2_start: 8192 pages, ino 130135; err -30

I have a loopback device formatted with ext4 (^has_journal, disabled journalling).

During shutdown, when I try to force remount as read-only, the loopback mounted filesystem. echo "u" > /proc/sysrq-trigger

I see these ext4 errors after remount ext4_da_writepages: jbd2_start: 8192 pages, ino 130135; err -30

(err 30 is -EROFS, error due to writeback to read-only filesystem). As part of remount, I see that linux calls invalidate_bdev() which I guess should not let any writeback to occur. Not sure why I see these errors.

I do not see this error when I format the loopback device as vfat.

Any help is appreciated.



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