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ext4: Preventing corruption on power loss/crash
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mv
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Joined: 20 Apr 2005
Posts: 4223

PostPosted: Tue Oct 29, 2013 8:28 am    Post subject: Reply with quote

ryao wrote:
For what it is worth, Linux's block subsystem does not do barriers anymore:

http://lwn.net/Articles/399715/

Maybe I do not completely understand, but in the corresponding discussion it is mentioned that the patch concerns a case which was used only in the reiserfs with "barriers". Since at the time of discussion certainly ext4 already supported "barriers", I guess this is about a different mechanism though that is also called "barriers".

Edit: Read carefully the whole thread again, and it seems that you are right: They were replacing in the kernel a mechanism which was known to work by a presumable faster mechanism which is known to fail on a lot of hardware. What a shame for linux!
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haarp
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Joined: 31 Oct 2007
Posts: 372

PostPosted: Sun Jan 26, 2014 10:36 pm    Post subject: Reply with quote

Code:
EXT4-fs (md0): 67 orphan inodes deleted

AAAAHHH!!

That's 67 inodes of random untraceable corruption! I need to get away from EXT4. Anything but this...
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