On Tue, 2013-09-24 at 17:19 -0500, Serge Hallyn wrote: > Quoting Michael H. Warfield (m...@wittsend.com): > > No. There's a change there, all right, and thank you for reminding me > > of that, but (afaik) it's NOT in the kernel itself. It's a mount > > option. It's that bloody MS_SHARED option and, to a lessor extent, > > There *is* a kernel change which dhansen was telling me about last > week - I believe it's commit 4ed5e82fe77f4147cf386327c9a63a2dd7eff518. > It allows you to now do
> sudo mount -t tmpfs tmpfs /tmp/a > sudo mount -o bind,remount,ro /tmp/a /tmp/b > In the past you had to first create a bind mount before you could > mark it readonly, i.e. > sudo mount -t tmpfs tmpfs /tmp/a > sudo mount --bind /tmp/a /tmp/b > sudo mount -o remount,ro /tmp/b /tmp/b Interesting point. Very interesting. I guess I can dig into it an look it up but, what rev did that commit show up in and does it impact the way we handle things dependent on kernel version? > In either case first making sure there is a bind-mount for us to mark > read-write seems to work. (We'll have to, of course, make sure it > was actually read-write to begin with, and that the user *wants* it > read-write. That'll be the only painful part of this patch) Yeah... That sounds about right. > -serge Regards, Mike -- Michael H. Warfield (AI4NB) | (770) 985-6132 | m...@wittsend.com /\/\|=mhw=|\/\/ | (678) 463-0932 | http://www.wittsend.com/mhw/ NIC whois: MHW9 | An optimist believes we live in the best of all PGP Key: 0x674627FF | possible worlds. A pessimist is sure of it!
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