Re: READDIRPLUS max mount option

[Kyle Rose]

> The binary mount format is frozen forever, so the changes to nfs_mount.h
> and nfs4_mount.h are definitely NACKed.
>   
Ah. :-)  So is there no way to add mount options, or is there a 
different mechanism today?
> Otherwise, it would be nice to know why this absolutely has to be made a
> mount option rather than just having a system-wide option (either a
> module/boot parameter or a sysctl) to control the behaviour of all
> mounts.
>   
I mount multiple remote file systems.  Only one of them I own, so I'm 
willing to potentially hammer it with huge READDIRPLUS requests, while 
the others probably deserve more benign behavior. ;-)

In general, I think having system-wide defaults somewhere in proc is 
helpful---and certainly superior to a constant in the source---but there 
should really be mount-specific overrides wherever the system-wide 
default might not be globally appropriate.

Kyle

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