Re: [PATCH] Define a UNIQUE value for AS_UNEVICTABLE flag

[Andrew Morton]

On Thu, 02 Apr 2009 12:47:15 -0400 Lee Schermerhorn <Lee.Schermerhorn@xxxxxx> wrote:

> [PATCH] Define UNIQUE value of AS_UNEVICTABLE
> 
> Needed in 2.6.28, 2.6.29, ...
> 
> A new "address_space flag"--AS_MM_ALL_LOCKS--was defined to use the next
> available AS flag while the Unevictable LRU was under development.  The
> Unevictable LRU was using the same flag and "no one" noticed.  Current 
> mainline, since 2.6.28, has same value for two symbolic flag names.

argh.

What are the user-observable effects of the bug, and why didn't anyone
notice it until now?

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