From: Robert Love <rml@tech9.net>
To: Hua Zhong <hzhong@cisco.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: use shmfs
Date: 16 Dec 2001 00:31:25 -0500 [thread overview]
Message-ID: <1008480693.4514.0.camel@phantasy> (raw)
In-Reply-To: <00c801c185c8$466ebb60$5900a8c0@cisco.com>
In-Reply-To: <00c801c185c8$466ebb60$5900a8c0@cisco.com>
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
prev parent reply other threads:[~2001-12-16 5:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-16 0:26 use shmfs Hua Zhong
2001-12-16 5:31 ` Robert Love [this message]
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