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Alan Cox wrote: >On Llu, 2006-05-22 at 17:24 +1200, Sam Vilain wrote: > > >>From: Sam Vilain <sam.vilain@catalyst.net.nz> >> >>Export the UTS information to a per-process directory /proc/PID/uts, >>that has individual nodes for hostname, ostype, etc - similar to >>those in /proc/sys/kernel >> >> > >Can you explain the locking being used here against the name being >changed at the same moment ? > Is this a test? :-) Let's see, get_task_pid locks the task struct (so that it doesn't go away while we're de-referencing the nsproxy and uts_ns etc), and the kobj references are assumed to be enough to avoid the references dropping away in the meantime. I didn't grab uts_sem. That semaphore could be made per-uts_ns, in theory. Whether anyone cares about contention that much is another question. I intended this to be exploratory, it wasn't really mergable. Should have added an [RFC] tag, sorry about that. Sam. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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