Subject: Re: NAMECACHE_ENTER_REVERSE (Re: CVS commit: src/sys/kern)
To: None <>
From: Christos Zoulas <>
List: tech-kern
Date: 11/28/2006 20:48:37
In article <>,
YAMAMOTO Takashi <> wrote:
>> Module Name:	src
>> Committed By:	christos
>> Date:		Wed Oct 25 18:56:39 UTC 2006
>> Modified Files:
>> 	src/sys/kern: vfs_cache.c
>> Log Message:
>> enable namecache enter reverse for linux procfs lookups.
>> XXX: how expensive is that?
>> To generate a diff of this commit:
>> cvs rdiff -r1.65 -r1.66 src/sys/kern/vfs_cache.c
>> Please note that diffs are not public domain; they are subject to the
>> copyright notices on the relevant files.
>it's wrong because our name cache is optional.
>ie. a filesystem is free to choose not to use it at all.
>please revert.

If the filesystem does not implement it, it fails with an error.
Actually I have a good idea how to deal with the failure in the
procfs "exe" case.

>(besides, i don't think it works as linux procfs expects,
>because there entries are not pinned.)

I think it is good enough for the purpose required
(to find any path to the vnode requested).

>if vnode -> name translation is really necessary, it should be
>implemented in upper layers.  (caller of VOPs, not filesystems.)

how? can you please elaborate?