linux-kernel - Re: [-mm PATCH 4/8] Memory controller memory accounting (v2)

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Date:	Tue, 10 Jul 2007 16:26:51 +0900 (JST)
From:	yamamoto@...inux.co.jp (YAMAMOTO Takashi)
To:	balbir@...ux.vnet.ibm.com
Cc:	svaidy@...ux.vnet.ibm.com, akpm@...ux-foundation.org,
	xemul@...nvz.org, a.p.zijlstra@...llo.nl,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	ebiederm@...ssion.com, containers@...ts.osdl.org, menage@...gle.com
Subject: Re: [-mm PATCH 4/8] Memory controller memory accounting (v2)

hi,

> diff -puN mm/memory.c~mem-control-accounting mm/memory.c
> --- linux-2.6.22-rc6/mm/memory.c~mem-control-accounting	2007-07-05 13:45:18.000000000 -0700
> +++ linux-2.6.22-rc6-balbir/mm/memory.c	2007-07-05 13:45:18.000000000 -0700

> @@ -1731,6 +1736,9 @@ gotten:
>  		cow_user_page(new_page, old_page, address, vma);
>  	}
>  
> +	if (mem_container_charge(new_page, mm))
> +		goto oom;
> +
>  	/*
>  	 * Re-check the pte - we dropped the lock
>  	 */

it seems that the page will be leaked on error.

> @@ -2188,6 +2196,11 @@ static int do_swap_page(struct mm_struct
>  	}
>  
>  	delayacct_clear_flag(DELAYACCT_PF_SWAPIN);
> +	if (mem_container_charge(page, mm)) {
> +		ret = VM_FAULT_OOM;
> +		goto out;
> +	}
> +
>  	mark_page_accessed(page);
>  	lock_page(page);
>  

ditto.

> @@ -2264,6 +2278,9 @@ static int do_anonymous_page(struct mm_s
>  		if (!page)
>  			goto oom;
>  
> +		if (mem_container_charge(page, mm))
> +			goto oom;
> +
>  		entry = mk_pte(page, vma->vm_page_prot);
>  		entry = maybe_mkwrite(pte_mkdirty(entry), vma);
>  

ditto.

can you check the rest of the patch by yourself?  thanks.

YAMAMOTO Takashi
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