Re: 4.14 backport request for dbdda842fe96f: "printk: Add console owner and waiter logic to load balance console writes"

Daniel Wang
2018-12-13T02:39:42Z

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> Additionally, for dbdda842fe96f to work as expected we really
need fd5f7cde1b85d4c. Otherwise printk() can schedule under
console_sem and console_owner, which will deactivate the "load
balance" logic.

It looks like fd5f7cde1b85d4c got into 4.14.82 that was released last month.

On Wed, Dec 12, 2018 at 6:27 PM Sergey Senozhatsky
<sergey.senozhatsky.work@gmail.com> wrote:
>
> On (12/12/18 16:40), Daniel Wang wrote:
> > In case this was buried in previous messages, the commit I'd like to
> > get backported to 4.14 is dbdda842fe96f: printk: Add console owner and
> > waiter logic to load balance console writes. But another followup
> > patch that fixes a bug in that patch is also required. That is
> > c14376de3a1b: printk: Wake klogd when passing console_lock owner.
>
> Additionally, for dbdda842fe96f to work as expected we really
> need fd5f7cde1b85d4c. Otherwise printk() can schedule under
> console_sem and console_owner, which will deactivate the "load
> balance" logic.
>
> -ss

--
Best,
Daniel

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