Re: [RFC PATCH v3 1/9] CPU hotplug: Provide APIs to prevent CPU offline from atomic context
From: Tejun Heo <tj@kernel.org>
Date: 2012-12-11 13:48:08
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From: Tejun Heo <tj@kernel.org>
Date: 2012-12-11 13:48:08
Also in:
lkml
Hello, Srivatsa. On Tue, Dec 11, 2012 at 06:43:54PM +0530, Srivatsa S. Bhat wrote:
This approach (of using synchronize_sched()) also looks good. It is simple, yet effective, but unfortunately inefficient at the writer side (because he'll have to wait for a full synchronize_sched()).
While synchornize_sched() is heavier on the writer side than the originally posted version, it doesn't stall the whole machine and wouldn't introduce latencies to others. Shouldn't that be enough? Thanks. -- tejun