On 02/17/2014 05:35 AM, Martin Steigerwald wrote:
Am Dienstag, 11. Februar 2014, 15:50:12 schrieb Dave:
On Tue, Feb 11, 2014 at 10:36 AM, Martin Steigerwald

<mar...@lichtvoll.de> wrote:
Today I started getting those on 3.14-rc. One core as displayed as 100%
system CPU. I rebooted cause the system didnĀ“t respond consistently to
user input anymore.

Does 3.14-rc1 have Joseph's delayed refs throttling code?  I had two
separate machines that exhibited similar symptoms.  Chris's for-linus
branch has a fix for this which solved my problems:
https://urldefense.proofpoint.com/v1/url?u=https://git.kernel.org/cgit/linux/kernel/git/mason/linux-btrfs.git/commit/?h%3Dfor-linus%26id%3D27a377db745ed4d11b3b9b340756857cb8dde07f&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=6%2FL0lzzDhu0Y1hL9xm%2BQyA%3D%3D%0A&m=EO6xV8TuAFpGsdd9TfvXbfHYgIFA8%2BKZo1KnQ%2BZ6yzU%3D%0A&s=c9c8769a12e5537247d6ef176681cf19e2bf80fef186ead748b8a2cd2bac6a85

I also got this now under 3.14-rc3 with almost 16 GiB left on heavy KMail /
Akonadi activity. 3.14-rc3 includes above commit.

As I now also got it with more free space and never saw this with upto
3.13 I think this is a regression.

Do we eventually recover or is it stuck like this forever?

-chris
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