Messages in this thread | | | Subject | Re: Re: printk meeting at LPC | From | Tony Asleson <> | Date | Fri, 4 Oct 2019 09:48:24 -0500 |
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On 9/13/19 8:26 AM, John Ogness wrote: > 9. Support for printk dictionaries will be discontinued. I will look > into who is using this and why. If printk dictionaries are important for > you, speak up now!
I think this functionality is important.
I've been experimenting with a change which adds dictionary data to storage related printk messages so that a persistent durable id is associated with them for filtering, eg.
$ journalctl -r _KERNEL_DURABLE_NAME=naa.0000000000bc614e
This has the advantage that when the device attachment changes across reboots or detach/reattach cycles you can easily find its messages throughout it's recorded history.
Other reasons were outlined when introduced, ref. https://lwn.net/Articles/490690/
I believe this functionality hasn't been leveraged to its full potential yet.
-Tony
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