Re: CVS commit: src/sys/uvm

[Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>]

> Module Name:    src
> Committed By:   drochner
> Date:           Thu Feb 26 18:18:14 UTC 2009
> 
> Modified Files:
>         src/sys/uvm: uvm_page.c
> 
> Log Message:
> -fix two conditions where PQ_FREE was still/already set while the page
>  was not anymore/yet on the freelist and uvm_fpageqlock was not held
> -clear PQ_FREE while the page is in the works of pageidlezero
> This avoids that the DMA memory allocator (pglistalloc) grabs a page
> which is not on the freelist, leading to a diagnostic panic (with DEBUG)
> or freelist corruption. (mostly on X server activation after a VT
> switch or suspend/resume because this can allocate megabytes of AGP
> memory)
> This might fix PR port-i386/38989 by Alan Barrett (in case this was
> a multiprocessor).

Very nice catch, thanks! :)

P.S. please do not forget the pull-up request.

-- 
Best regards,
Mindaugas