[OpenAFS] Removing the ability to change the PAG of the parent

Jason Edgecombe jason@rampaginggeek.com
Tue, 16 Feb 2010 19:56:15 -0500

Personally, I don't use aklog -setpag

Simon Wilkinson wrote:
> We're currently (on opeanfs-devel) discussing a new mechanism for 
> storing tokens in the kernel - this new mechanism is required to 
> support new security layers such as rxgk and rxk5. There have been a 
> significant number of posters advocating removing the 'change the PAG 
> of my parent' feature, which is used by aklog -setpag, amongst others. 
> A process would still be able to change its own PAG.
> There are numerous technical reasons for wanting to make this change. 
> This functionality is very difficult to implement in a cross-platform 
> manner, without exposing ourselves to all sorts of kernel races. On 
> some platforms (such as Linux) it works on some kernel versions, but 
> not on others. Things would be made considerably easier if this 
> feature went away.
> Based on current developer feedback, I'm planning on removing the 
> setpag functionality from the new interface. However, before making 
> the final decision, I'm very interested in hearing the views of 
> deployers and end users? How many of you rely on aklog -setpag? How 
> difficult would things be for you if it went away in some future major 
> release [*]?
> Thanks,
> Simon
> [*] Whilst I can't commented for the gatekeepers, I'd imagine that 
> this kind of thing would only change with a major release hike, and 
> certainly not before 1.8 given the current release plans.
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