Messages in this thread |  | | | Date | Sat, 1 Dec 2007 20:48:25 -0800 | | From | Greg KH <> | | Subject | Re: Since sysfs_mount is static and used only in sysfs_init function, it could be just an automatic variable. | |
On Sun, Dec 02, 2007 at 04:31:09AM +0800, rae l wrote:
> ---
> and I still have questions about this code:
> 1. Why here kern_mount is needed?
> Or the first time user space `mount -t sysfs` won't do that?
> 2. If root executes many mounts to mount sysfs on /sys and many other places,
> are there many instances of struct vfsmount those have only
> mnt_mountpoint different?
>
> For most common case, mount a virtual filesystem(proc, sysfs, ...) on
> multiple mounting point,
> how to handle it more efficiently?
>
> and where is a detailed explaination on kern_mount? could someone give
> some comments or documentation pointers on this?
See the patches that Eric Biederman just posted to lkml for why this
structure is a static pointer this way right now, it's in preparation
for future patches.
Hope this helps,
greg k-h
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