At Wed, 10 Mar 2004 22:38:06 +0100,
Djalil Chafai wrote:
> I propose a new version of /etc/init.d/mountkernfs in order to
> support shmfs|tmpfs|ramfs. I'm not sure that it corrects the problem
> in all cases, but it works at least for me with kernel 2.4.25
> (CONFIG_RAMFS=y and CONFIG_TMPFS is not set).
Unfortunately, I would reject your patch. Ramfs is not tmpfs. In 2.3
series Linus put ramfs. AFAIK, the intension of ramfs is "sample
ram-based filesystem". It's not Christoph's shmfs/tmpfs which was
intended to provide POSIX shared memory. And /dev/shm is used for
POSIX shared memory.
Look at sysdeps/unix/sysv/linux/shm_open.c:where_is_shmfs().
/* Determine where the shmfs is mounted (if at all). */
static void
where_is_shmfs (void)
{
...
/* The canonical place is /dev/shm. This is at least what the
documentation tells everybody to do. */
if (__statfs (defaultdir, &f) == 0 && f.f_type == SHMFS_SUPER_MAGIC)
Again, ramfs is not tmpfs.
Regards,
-- gotom
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