From: Petr Vandrovec <vandrove@vc.cvut.cz>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Alexey Dobriyan <adobriyan@gmail.com>,
rjw@sisk.pl, trond.myklebust@fys.uio.no, gnome42@gmail.com,
linux-kernel@vger.kernel.org, bfields@fieldses.org,
den@openvz.org, Pavel Emelyanov <xemul@openvz.org>
Subject: Re: [PATCH 2.6.24-rc4] proc: Remove/Fix proc generic d_revalidate
Date: Sun, 09 Dec 2007 18:52:26 -0800 [thread overview]
Message-ID: <475CA9EA.1090405@vc.cvut.cz> (raw)
In-Reply-To: <m1lk85q0cw.fsf_-_@ebiederm.dsl.xmission.com>
Eric W. Biederman wrote:
> Ultimately to implement /proc perfectly we need an implementation
> of d_revalidate because files and directories can be removed behind
> the back of the VFS, and d_revalidate is the only way we can let
> the VFS know that this has happened.
>
> So until we get a proper test for keeping dentries in the dcache
> fix the current d_revalidate method by completely removing it. This
> returns us to the current status quo.
Hello,
I know that I'm late to the party, but mount points is not only
problem with d_revalidate. With your patch in place module below gets
refcount incremented by two every time I do 'ls -la /proc/fs/vmblock'.
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
static int vmblockinit(void) {
struct proc_dir_entry *controlProcDirEntry;
/* Create /proc/fs/vmblock */
controlProcDirEntry = proc_mkdir("vmblock", proc_root_fs);
if (!controlProcDirEntry) {
printk(KERN_DEBUG "Bad...\n");
return -EINVAL;
}
controlProcDirEntry->owner = THIS_MODULE;
return 0;
}
static void vmblockexit(void) {
remove_proc_entry("vmblock", proc_root_fs);
}
module_init(vmblockinit);
module_exit(vmblockexit);
(code comes from VMware's vmblock module,
http://sourceforge.net/project/showfiles.php?group_id=204462)
Thanks,
Petr
next prev parent reply other threads:[~2007-12-10 3:13 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-07 4:45 2.6.24-rc3-git4 NFS crossmnt regression Shane
2007-12-07 12:02 ` Andrew Morton
2007-12-07 18:14 ` Shane
2007-12-07 18:36 ` Shane
2007-12-07 18:46 ` Trond Myklebust
2007-12-07 18:55 ` Shane
2007-12-07 19:16 ` Shane
2007-12-07 19:39 ` Shane
2007-12-07 22:51 ` Trond Myklebust
2007-12-07 23:14 ` Andrew Morton
2007-12-07 23:35 ` Eric W. Biederman
2007-12-07 23:43 ` Rafael J. Wysocki
2007-12-08 0:00 ` Alexey Dobriyan
2007-12-08 0:15 ` Andrew Morton
2007-12-08 2:13 ` Shane
2007-12-08 4:18 ` Eric W. Biederman
2007-12-08 4:25 ` [PATCH 2.6.24-rc4] proc: Remove/Fix proc generic d_revalidate Eric W. Biederman
2007-12-08 17:15 ` Shane
2007-12-10 2:52 ` Petr Vandrovec [this message]
2007-12-10 13:32 ` Denis V. Lunev
2007-12-10 19:35 ` Andrew Morton
2007-12-10 21:35 ` vandrove
2007-12-08 4:39 ` 2.6.24-rc3-git4 NFS crossmnt regression Eric W. Biederman
2007-12-09 0:20 ` Maxim Levitsky
2007-12-09 19:50 ` J. Bruce Fields
2007-12-10 5:03 ` Neil Brown
2007-12-10 14:19 ` Maxim Levitsky
2007-12-10 14:36 ` J. Bruce Fields
2007-12-10 15:05 ` Maxim Levitsky
2007-12-10 15:47 ` J. Bruce Fields
2007-12-10 18:22 ` Maxim Levitsky
2007-12-10 21:03 ` Andrew Morton
2007-12-12 2:01 ` 2.6.24-rc3-git4 NFS crossmnt regression [SOLVED] Maxim Levitsky
2007-12-12 2:15 ` Andrew Morton
2007-12-12 2:19 ` Trond Myklebust
2007-12-12 2:44 ` Andrew Morton
2007-12-12 2:24 ` Maxim Levitsky
2007-12-10 19:51 ` 2.6.24-rc3-git4 NFS crossmnt regression Shane
2007-12-07 22:33 ` Andrew Morton
2007-12-07 22:39 ` Trond Myklebust
2007-12-07 19:54 ` Rafael J. Wysocki
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