Re: [PATCH v2 00/14] Introducing TIF_NOTIFY_IPI flag
From: Peter Zijlstra <peterz@infradead.org>
Date: 2024-06-15 01:43:06
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linux-alpha, linux-pm, linux-sh, lkml, sparclinux
On Fri, Jun 14, 2024 at 12:48:37PM +0200, Vincent Guittot wrote:
The main problem is that need_resched becomes somewhat meaningless because it doesn't only mean "I need to resched a task" and we have to add more tests around even for those not using polling
The converse problem is that you're adding a bunch of atomic ops that might be avoided. It might now need to set both the RESCHED and IPI flags -- and clear them again.