lkml.org 
[lkml]   [2001]   [Dec]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Is /dev/shm needed?
Date
Hi RaúlNúñez,

On Mon, 17 Dec 2001, RaúlNúñez de Arenas Coronado wrote:
> Hello Robert :)
>
>>It is not needed. /dev/shm mounted with tmpfs is only needed for
>>POSIX shared memory, which is still fairly rare.
>
> That this means that I can mount more than one 'tmpfs' just like
> if it's a *real* filesystem? I wasn't sure, since it's implemented
> thru the page cache.

Yes, every single mount is an independant tree.

>>It is dynamic, so you don't need to specify a size.
>
> Yes, I knew, I meant the maximum size. I don't want half of the
> RAM occupied just by a programming mistake ;)))

What I like most about /tmp in tmpfs is the ability to resize on the
fly: I have a big swap partition and a reasonable limit for /tmp and
/var/tmp.

When one of these gets full I can either stop the affending job or
increase the limit: If there is swap left I can simply increase the
limit. If swap is full I add a swap file on a real filesystem and
increase the limit.

Greetings
Christoph

P.S: Documentation/filesystems/tmpfs.txt is in the 2.4.17-rc patch.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:14    [W:0.076 / U:0.032 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site