Messages in this thread | | | From | "Luck, Tony" <> | Subject | RE: x86, mce, Use user return notifier in mce | Date | Mon, 23 Jan 2012 23:00:16 +0000 |
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> This is a performance issue. So maybe we need to measure the actual > latency firstly. The first step can be using WQ_HIGHPRI as you > suggested.
To clarify "performance issue" a bit. The situation is that h/w has found some error in a piece of memory that is not currently being accessed by any processor - we don't have to take any action right away - but we'd like to run the work queue that will hunt down which processes are using this page sooner, rather than later. If some process does access the memory, it will be a fatal error on some systems - but if we get there first, we can mark the page, kill the process(es) and keep the system running.
So we are looking for a solution where there isn't an unbounded time before the work queue gets run.
-Tony
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