Messages in this thread | | | Subject | Re: [PATCH] ipc/sem: do not sleep with a spin lock held | From | Vasily Averin <> | Date | Wed, 22 Dec 2021 18:50:58 +0300 |
| |
On 22.12.2021 18:31, Vasily Averin wrote: > On 22.12.2021 14:45, Manfred Spraul wrote: >> Hi Minghao, >> >> On 12/22/21 09:10, cgel.zte@gmail.com wrote: >>> From: Minghao Chi <chi.minghao@zte.com.cn> >>> >>> We can't call kvfree() with a spin lock held, so defer it. > > I'm sorry, but I do not understand why exactly we cannot use kvfree? > Could you explain it in more details?
Got it, there is cond_resched() called in __vfree() -> __vunmap()
However I'm still not sure that in_interrupt() is used correctly here.
Thank you, Vasily Averin
| |