Re: __alloc_pages: 0-order allocation failed

[Andrea Arcangeli]

On Mon, Sep 24, 2001 at 09:38:24AM -0300, Marcelo Tosatti wrote:
> --- linux.orig/mm/vmscan.c	Mon Sep 24 10:36:40 2001
> +++ linux/mm/vmscan.c	Mon Sep 24 10:54:01 2001
> @@ -567,6 +567,9 @@
>  		if (nr_pages <= 0)
>  			return 1;
>  
> +		if (nr_pages < SWAP_CLUSTER_MAX)
> +			ret |= 1;
> +

too much permissive (vm-tweaks-1 does something similar but not that
permissive)

>  		ret |= swap_out(priority, classzone, gfp_mask, SWAP_CLUSTER_MAX << 2);
>  	} while (--priority);
>  
> --- linux.orig/mm/page_alloc.c	Mon Sep 24 10:36:40 2001
> +++ linux/mm/page_alloc.c	Mon Sep 24 10:44:12 2001
> @@ -400,7 +400,7 @@
>  			if (!z)
>  				break;
>  
> -			if (zone_free_pages(z, order) > z->pages_high) {
> +			if (zone_free_pages(z, order) > z->pages_min) {

that breaks oom detection.

Andrea