Re: Memory corruption during hibernation since 2.6.31

[KOSAKI Motohiro]

> Index: linux-2.6.34.org/mm/swapfile.c
> ===================================================================
> --- linux-2.6.34.org.orig/mm/swapfile.c
> +++ linux-2.6.34.org/mm/swapfile.c
> @@ -316,7 +316,9 @@ checks:
>  		scan_base = offset = si->lowest_bit;
>  
>  	/* reuse swap entry of cache-only swap if not busy. */
> -	if (vm_swap_full() && si->swap_map[offset] == SWAP_HAS_CACHE) {
> +	if (vm_swap_full()
> +		&& usage == SWAP_HAS_CACHE
> +		&& si->swap_map[offset] == SWAP_HAS_CACHE) {
>  		int swap_was_freed;
>  		spin_unlock(&swap_lock);
>  		swap_was_freed = __try_to_reclaim_swap(si, offset);

Can you please add explicit commenting in the code?



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