Christoph Hellwig a écrit :
On Thu, Nov 27, 2008 at 12:32:59AM +0100, Eric Dumazet wrote:
This function arms a flag (MNT_SPECIAL) on the vfs, to avoid
refcounting on permanent system vfs.
Use this function for sockets, pipes, anonymous fds.
special is not a useful name for a flag, by definition everything that
needs a flag is special compared to the version that doesn't need a
flag.
The general idea of skippign the writer counts makes sense, but please
give it a descriptive name that explains the not unmountable thing.
And please kill your kern_mount wrapper and just set the flag manually.
Also I think it should be a superblock flag, not a mount flag as you
don't want thse to differ for multiple mounts of the same filesystem.
Hum.. we have a superblock flag already, but testing it in mntput()/mntget()
is going to be a litle bit expensive if we add a derefence ?
if (mnt && mnt->mnt_sb->s_flags & MS_SPECIAL) {
...
}
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