Messages in this thread | | | Date | Mon, 5 Aug 2019 23:11:19 -0700 | From | Christoph Hellwig <> | Subject | Re: [patch V2 0/7] fs: Substitute bit-spinlocks for PREEMPT_RT and debugging |
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On Fri, Aug 02, 2019 at 11:07:53AM +0200, Thomas Gleixner wrote: > Last time I did, there was resistance :)
Do you have a pointer? Note that in the buffer head case maybe a hash lock based on the page address is even better, as we only ever use the lock in the first buffer head of a page anyway..
> What about the page lock? > > mm/slub.c: bit_spin_lock(PG_locked, &page->flags);
One caller ouf of a gazillion that spins on the page lock instead of sleepign on it like everyone else. That should not have passed your smell test to start with :)
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