Re: [PATCH v2 0/4] ipc: reduce ipc lock contention

[Peter Zijlstra]

On Tue, 2013-03-05 at 15:53 -0500, Rik van Riel wrote:

> Indeed.  Though how well my patches will work with Oracle will
> depend a lot on what kind of semctl syscalls they are doing.
> 
> Does Oracle typically do one semop per semctl syscall, or does
> it pass in a whole bunch at once?

https://oss.oracle.com/~mason/sembench.c

I think Chris wrote that to match a particular pattern of semaphore
operations the database engine in question does. I haven't checked to
see if it triggers the case in point though.

Also, Chris since left Oracle but maybe he knows who to poke.

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