Messages in this thread | | | Date | Thu, 13 Jul 2006 16:22:18 -0500 | From | "Serge E. Hallyn" <> | Subject | Re: [PATCH -mm 5/7] add user namespace |
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Quoting Eric W. Biederman (ebiederm@xmission.com): > >> keys are essentially security credentials for something besides the > >> local kernel. Think kerberos tickets. That makes the keys the > >> obvious place to say what uid you are in a different user namespace > >> and similar things. > > > > what about performance ? wouldn't that slow the checking ? > > It needs to be looked at, but it shouldn't slow the same namespace > case,
How so? The processesing is the same.
> and permission checking is largely a slow path issue. So a little > overhead at open time is preferred to overhead after you get the file > open.
Unsure which approach has overhead after file open...
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