Re: Updated Linux 2.4 Status/TODO List (from the ALS show)

[Linus Torvalds]

On Thu, 12 Oct 2000, David S. Miller wrote:
> 
>    page_table_lock is supposed to protect normal page table activity (like
>    what's done in page fault handler) from swapping out.
>    However, grabbing this lock in swap-out code is completely missing!
> 
> Audrey, vmlist_access_{un,}lock == unlocking/locking page_table_lock.

Yeah, it's an easy mistake to make.

I've made it myself - grepping for page_table_lock and coming up empty in
places where I expected it to be.

In fact, if somebody sends me patches to remove the "vmlist_access_lock()"
stuff completely, and replace them with explicit page_table_lock things,
I'll apply it pretty much immediately. I don't like information hiding,
and right now that's the only thing that the vmlist_access_lock() stuff is
doing.

                Linus

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