Messages in this thread | | | Date | Tue, 09 Nov 2004 14:07:21 -0800 | From | "Martin J. Bligh" <> | Subject | Re: [PATCH] Use MPOL_INTERLEAVE for tmpfs files |
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--On Tuesday, November 09, 2004 21:08:11 +0000 Hugh Dickins <hugh@veritas.com> wrote:
> On Tue, 9 Nov 2004, Martin J. Bligh wrote: >> >> > I'm irritated to realize that we can't change the default for SysV >> > shared memory or /dev/zero this way, because that mount is internal. >> >> Boggle. shmem I can perfectly understand, and have been intending to >> change for a while. But why /dev/zero ? Presumably you'd always want >> that local? > > I was meaning the mmap shared writable of /dev/zero, to get memory > shared between parent and child and descendants, a restricted form > of shared memory. I was thinking of them running on different cpus, > you're suggesting they'd at least be on the same node. I dare say, > I don't know. I'm not desperate to be able to set some other mpol > default for all of them (and each object can be set in the established > way), just would have been happier if the possibility of doing so came > for free with the mount option work.
Oh yeah ... the anon mem allocator trick. Mmmm. Not sure that should have a different default than normal alloced memory, but either way, what you're suggesting makes a whole lot more sense to me know than just straight /dev/zero ;-)
Thanks for the explanation.
M.
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