On Wed, 2015-09-23 at 16:48 -0400, Theodore Ts'o wrote: > On Wed, Sep 23, 2015 at 10:47:16PM +0300, Artem Bityutskiy wrote: > > And, by the way, I forgot this detail - I cut AC power off at the > > end, then put it back on after a 20 seconds delay. I mean, this is > > a > > clean reboot, but with power cut at the end. > > Is this reproducible without the power cut? And what model SSD are > you using, and are you sure that it has Power Loss Protection (many > SSD vendors use power loss protection as the price discrimination > feature between consumer-grade SSD and enterprise-grade SSD's that > cost $$$). If this problem wasn't showing up with 4.2, and is only > failing with 4.3-rcX, then it might not be a hardware issue --- but > it's also possible that there was a timing issue which was hiding a > hardware problem. So for the purposes of debugging, removing the > power cut from the set of variables is a useful thing to do. Ted, you are right that the problem may be anywhere, but since Tejun's patch fixes it, I decided to not spend time on testing without AC power cuts. But I checked and on of my boxes uses an HDD, and it shows the same problem, which makes the theory of imperfect SSD firmware being involved less likely. Thanks, Artem. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
