From: Padraig Brady <padraig@antefacto.com>
To: Christoph Rohland <cr@sap.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [RFC] Documentation/filesystems/tmpfs
Date: Wed, 28 Nov 2001 17:49:00 +0000 [thread overview]
Message-ID: <3C05238C.5080903@antefacto.com> (raw)
In-Reply-To: <m3y9kqon6w.fsf@linux.local> <3C051F2D.2030804@antefacto.com> <m3u1veokyd.fsf@linux.local>
Christoph Rohland wrote:
> Hi Padraig,
>
> On Wed, 28 Nov 2001, Padraig Brady wrote:
>
>>>In contrast to RAM disks, which get allocated a fixed amount of
>>>physical RAM, tmpfs grows and shrinks to accommodate the files it
>>>contains and is able to swap unneeded pages out to swap space.
>>>
>>
>>
>>That isn't the case now since ramdisks were integrated with the
>>buffer cache:
>>
>
> What isn't the case any more?
Because the RAM is now (de)allocated as required.
>
>>$ dd if=/dev/zero of=/tmp/use_mem bs=1024 count=20000
>>
>
> On what filesystem is /tmp/use_mem located? What do you want to show?
Filesystem? ext2 on /dev/ram1(rd.o)
meminfo shows the memory being reclaimed as the file is deleted.
Padraig.
next prev parent reply other threads:[~2001-11-28 17:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-28 16:49 [RFC] Documentation/filesystems/tmpfs Christoph Rohland
2001-11-28 17:30 ` Padraig Brady
2001-11-28 17:37 ` Christoph Rohland
2001-11-28 17:49 ` Padraig Brady [this message]
2001-11-28 20:38 ` [MOc]cda*mirabilos
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