Messages in this thread | | | From | John Ogness <> | Subject | Re: [PATCH printk 10/18] kgbd: Pretend that console list walk is safe | Date | Fri, 30 Sep 2022 15:50:56 +0206 |
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On 2022-09-30, Petr Mladek <pmladek@suse.com> wrote: > Anyway, what about using the later added SRCU walk here? > After all, this is exactly what RCU is for, isn't it?
So I think a lot of the problems with this series is that SRCU is introduced too late. We are debating things in patch 6 that are irrelevant by patch 12.
I will rework the series so that the changes come in the following order:
1. provide an atomic console_is_enabled()
2. convert the list to SRCU
3. move all iterators from console_lock()/console_trylock() to SRCU
Step 3 may result in console_lock()/console_trylock() calls disappearing or relocating to where they are needed for non-list-synchronization purposes.
John
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