On Sat, 2001-12-15 at 19:26, Hua Zhong wrote:
> Currently I'm using shmfs as a volatile storage. I am using Monta Vista's
> kernel (2.4.2). I added the following line in /etc/fstab:
>
> tmpfs /dev/shm shm defaults 0 0
> <snip>
> I cannot write to the filesystem. write returns EINVAL. I can create an
> empty file, however.
It is confusing: tmpfs is used both for abstracting POSIX shared memory
(shm) and for a page-cache-based dynamic RAM disk. The line above, that
you are adding, is for the shm support. You need to add another line to
create the tmpfs filesystem at a given mount point. Example:
tmpfs /var/cheese tmpfs defaults,size=4m 0 0
Would create a tmpfs at /var/cheese. The (optional) size parameter
specifies a maximum fs size of 4MB.
See Documentation/filesystems/tmpfs.txt for more information.
Robert Love
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This archive was generated by hypermail 2b29 : Sun Dec 23 2001 - 21:00:10 EST