Messages in this thread | | | Subject | Re: [3.2-rc2] loop device balance_dirty_pages_nr throttling hang | From | Theodore Tso <> | Date | Tue, 22 Nov 2011 08:17:07 -0500 |
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On Nov 22, 2011, at 5:49 AM, Dave Chinner wrote:
> But, I just noticed that the discard that mkfs.ext4 will result in > all the extents being discarded in the underlying image file (due to > the fact the loopback device now supports hole punching), so the > previous state of the image file is getting trashed by the mkfs.ext4 > execution, too. I think I already had a ext4 filesystem in some state > before I started running this manual prealloc test....
Which version of mkfs.ext4 are you using? We've disabled the discard by default (unless configured in via a command-line option or a /etc/mke2fs.conf setting since no distribution apparently wants to be responsible for running supplying a command that causes a crap SSD to turning into a brick; personally, I'd blame the manufacturer of the crap SSD, but….)
-- Ted
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