lkml.org 
[lkml]   [2007]   [May]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Convert namespace_sem to a mutex
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/

\
 
 \ /
  Last update: 2007-05-17 07:03    [W:0.112 / U:0.168 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site