Messages in this thread |  | | Date | Wed, 28 Nov 2001 17:49:00 +0000 | From | Padraig Brady <> | Subject | Re: [RFC] Documentation/filesystems/tmpfs |
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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.
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