Messages in this thread | | | Date | Wed, 03 Apr 2013 07:30:08 -0500 | From | Rob Landley <> | Subject | [RFC] rootmpfs |
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Attached is my quick and dirty hack to make rootfs be tmpfs when CONFIG_TMPFS is enabled. It can't be this easy or somebody would have done it in the _eight_years_ since https://lkml.org/lkml/2006/7/31/145
Yes, it's got an #ifdef and out of place prototypes. Yes, it manually calls a module init function and compensates by making it reentrant. But it works, and when I "cat /dev/zero > filename" the filesystem fills _up_ instead of panicing the kernel.
So now that I've posted the error, would someone please tell me how I _should_ have done it?
Rob
P.S. If I actually change the filesystem type to a name other than "rootfs", it panics on the way up because various bits of the kernel are looking for that magic name. Sigh.
P.P.S. removing MS_NOUSER is actually intentional, there's a local cray patch that does the same thing because otherwise you can't --bind mount directories out of this filesystem, which is a thing they wanted to do.
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