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SubjectRe: [PATCH][2.6] No swapping on memory backed swapfiles
Date
In article <200310130832.h9D8WJ4g000157@81-2-122-30.bradfords.org.uk>,
John Bradford <john@grabjohn.com> wrote:
| Quote from Andrew Morton <akpm@osdl.org>:
| > Zwane Mwaikambo <zwane@arm.linux.org.uk> wrote:
| > >
| > > + bdi = mapping->backing_dev_info;
| > > + if (bdi->memory_backed)
| > > + goto bad_swap;
| > > +
| >
| > I guess that makes sense, although someone might want to swap onto a
| > ramdisk-backed file just for some testing purpose.
|
| Or because some RAM is slower than the rest. This came up a while ago
| on the list.

Something on my "learn how to..." list, I have some systems which are
setup to cache only the first 64MB, and I bet they would run a lot
faster if the rest were used as swap. It is definitely faster with
mem=64 than letting the CPU beat the whole memory.
--
bill davidsen <davidsen@tmr.com>
CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.
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