Messages in this thread | | | Date | Thu, 17 May 2007 06:00:46 +0100 | From | Al Viro <> | Subject | Re: Convert namespace_sem to a mutex |
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On Thu, May 17, 2007 at 10:20:41AM +0530, Bharata B Rao wrote: > From: Bharata B Rao <bharata@linux.vnet.ibm.com> > > namespace_sem is a rwsem. It is acquired as read sem at only one place(used > by /proc/mounts, /proc/<pid>/mounts and /proc/<pid>/mountstats). In all other > cases it is acquired as a write sem. So, as there is not more than one reader > for this sem, this can be a generic sem (and not rwsem) and if so it can be > a mutex.
Except that read accesses outnumber write ones by far and we have no reason for serializing them against each other. NAK. - 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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