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From: Mel Gorman <mel@csn.ul.ie>
To: Andi Kleen <andi@firstfloor.org>
Cc: linux-kernel@vger.kernel.org, pj@sgi.com, linux-mm@kvack.org,
	nickpiggin@yahoo.com.au
Subject: Re: [PATCH] [13/18] Add support to allocate hugepages of different size with hugepages=...
Date: Tue, 18 Mar 2008 16:32:25 +0000	[thread overview]
Message-ID: <20080318163225.GM23866@csn.ul.ie> (raw)
In-Reply-To: <20080317015827.15E811B41E0@basil.firstfloor.org>

On (17/03/08 02:58), Andi Kleen didst pronounce:
> Signed-off-by: Andi Kleen <ak@suse.de>
> 
> ---
>  include/linux/hugetlb.h |    1 +
>  mm/hugetlb.c            |   23 ++++++++++++++++++-----
>  2 files changed, 19 insertions(+), 5 deletions(-)
> 
> Index: linux/mm/hugetlb.c
> ===================================================================
> --- linux.orig/mm/hugetlb.c
> +++ linux/mm/hugetlb.c
> @@ -552,19 +552,23 @@ static int __init hugetlb_init_hstate(st
>  {
>  	unsigned long i;
>  
> -	for (i = 0; i < MAX_NUMNODES; ++i)
> -		INIT_LIST_HEAD(&h->hugepage_freelists[i]);
> +	/* Don't reinitialize lists if they have been already init'ed */
> +	if (!h->hugepage_freelists[0].next) {
> +		for (i = 0; i < MAX_NUMNODES; ++i)
> +			INIT_LIST_HEAD(&h->hugepage_freelists[i]);
>  
> -	h->hugetlb_next_nid = first_node(node_online_map);
> +		h->hugetlb_next_nid = first_node(node_online_map);
> +	}


hmm, it's not very clear to me how hugetlb_init_hstate() would get
called twice for the same hstate. Should it be VM_BUG_ON() if a hstate
gets initialised twice instead?

>  
> -	for (i = 0; i < max_huge_pages[h - hstates]; ++i) {
> +	while (h->parsed_hugepages < max_huge_pages[h - hstates]) {
>  		if (h->order > MAX_ORDER) {
>  			if (!alloc_bm_huge_page(h))
>  				break;
>  		} else if (!alloc_fresh_huge_page(h))
>  			break;
> +		h->parsed_hugepages++;
>  	}
> -	max_huge_pages[h - hstates] = h->free_huge_pages = h->nr_huge_pages = i;
> +	max_huge_pages[h - hstates] = h->parsed_hugepages;
>  
>  	printk(KERN_INFO "Total HugeTLB memory allocated, %ld %dMB pages\n",
>  			h->free_huge_pages,
> @@ -602,6 +606,15 @@ static int __init hugetlb_setup(char *s)
>  	unsigned long *mhp = &max_huge_pages[parsed_hstate - hstates];
>  	if (sscanf(s, "%lu", mhp) <= 0)
>  		*mhp = 0;
> +	/*
> +	 * Global state is always initialized later in hugetlb_init.
> +	 * But we need to allocate > MAX_ORDER hstates here early to still
> +	 * use the bootmem allocator.
> +	 * If you add additional hstates <= MAX_ORDER you'll need
> +	 * to fix that.
> +	 */
> +	if (parsed_hstate != &global_hstate)
> +		hugetlb_init_hstate(parsed_hstate);
>  	return 1;
>  }
>  __setup("hugepages=", hugetlb_setup);
> Index: linux/include/linux/hugetlb.h
> ===================================================================
> --- linux.orig/include/linux/hugetlb.h
> +++ linux/include/linux/hugetlb.h
> @@ -212,6 +212,7 @@ struct hstate {
>  	unsigned int nr_huge_pages_node[MAX_NUMNODES];
>  	unsigned int free_huge_pages_node[MAX_NUMNODES];
>  	unsigned int surplus_huge_pages_node[MAX_NUMNODES];
> +	unsigned long parsed_hugepages;
>  };
>  
>  void __init huge_add_hstate(unsigned order);
> 
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@kvack.org.  For more info on Linux MM,
> see: http://www.linux-mm.org/ .
> Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
> 

-- 
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab

  reply	other threads:[~2008-03-19 20:56 UTC|newest]

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-17  1:58 [PATCH] [0/18] GB pages hugetlb support Andi Kleen
2008-03-17  1:58 ` [PATCH] [1/18] Convert hugeltlb.c over to pass global state around in a structure Andi Kleen
2008-03-17 20:15   ` Adam Litke
2008-03-18 12:05   ` Mel Gorman
2008-03-17  1:58 ` [PATCH] [2/18] Add basic support for more than one hstate in hugetlbfs Andi Kleen
2008-03-17 20:22   ` Adam Litke
2008-03-17 20:44     ` Andi Kleen
2008-03-18 12:23   ` Mel Gorman
2008-03-23 10:38   ` KOSAKI Motohiro
2008-03-23 11:28     ` Andi Kleen
2008-03-23 11:30       ` KOSAKI Motohiro
2008-03-17  1:58 ` [PATCH] [3/18] Convert /proc output code over to report multiple hstates Andi Kleen
2008-03-18 12:28   ` Mel Gorman
2008-03-17  1:58 ` [PATCH] [4/18] Add basic support for more than one hstate in hugetlbfs Andi Kleen
2008-03-17  8:09   ` Paul Jackson
2008-03-17  8:15     ` Andi Kleen
2008-03-17 20:28   ` Adam Litke
2008-03-18 14:11   ` Mel Gorman
2008-03-17  1:58 ` [PATCH] [5/18] Expand the hugetlbfs sysctls to handle arrays for all hstates Andi Kleen
2008-03-18 14:34   ` Mel Gorman
2008-03-18 16:49     ` Andi Kleen
2008-03-18 17:01       ` Mel Gorman
2008-03-17  1:58 ` [PATCH] [6/18] Add support to have individual hstates for each hugetlbfs mount Andi Kleen
2008-03-18 14:10   ` Adam Litke
2008-03-18 15:02   ` Mel Gorman
2008-03-17  1:58 ` [PATCH] [7/18] Abstract out the NUMA node round robin code into a separate function Andi Kleen
2008-03-18 15:42   ` Mel Gorman
2008-03-18 15:47     ` Andi Kleen
2008-03-18 16:04       ` Mel Gorman
2008-03-17  1:58 ` [PATCH] [8/18] Add a __alloc_bootmem_node_nopanic Andi Kleen
2008-03-18 15:54   ` Mel Gorman
2008-03-17  1:58 ` [PATCH] [9/18] Export prep_compound_page to the hugetlb allocator Andi Kleen
2008-03-17  1:58 ` [PATCH] [10/18] Factor out new huge page preparation code into separate function Andi Kleen
2008-03-17 20:31   ` Adam Litke
2008-03-18 16:02   ` Mel Gorman
2008-03-17  1:58 ` [PATCH] [11/18] Fix alignment bug in bootmem allocator Andi Kleen
2008-03-17  2:19   ` Yinghai Lu
2008-03-17  7:02     ` Andi Kleen
2008-03-17  7:17       ` Yinghai Lu
2008-03-17  7:31         ` Yinghai Lu
2008-03-17  7:41           ` Andi Kleen
2008-03-17  7:53             ` Yinghai Lu
2008-03-17  8:10               ` Yinghai Lu
2008-03-17  8:17                 ` Andi Kleen
2008-03-17  8:56               ` Andi Kleen
2008-03-17 18:52                 ` Yinghai Lu
2008-03-17 21:27                   ` Yinghai Lu
2008-03-18  2:06                     ` Yinghai Lu
2008-03-18 16:18   ` Mel Gorman
2008-03-17  1:58 ` [PATCH] [12/18] Add support to allocate hugetlb pages that are larger than MAX_ORDER Andi Kleen
2008-03-18 16:27   ` Mel Gorman
2008-04-09 16:05   ` Andrew Hastings
2008-04-09 17:56     ` Andi Kleen
2008-03-17  1:58 ` [PATCH] [13/18] Add support to allocate hugepages of different size with hugepages= Andi Kleen
2008-03-18 16:32   ` Mel Gorman [this message]
2008-03-18 16:45     ` Andi Kleen
2008-03-18 16:46       ` Mel Gorman
2008-03-17  1:58 ` [PATCH] [14/18] Clean up hugetlb boot time printk Andi Kleen
2008-03-18 16:37   ` Mel Gorman
2008-03-17  1:58 ` [PATCH] [15/18] Add support to x86-64 to allocate and lookup GB pages in hugetlb Andi Kleen
2008-03-17  1:58 ` [PATCH] [16/18] Add huge pud support to hugetlbfs Andi Kleen
2008-03-17  1:58 ` [PATCH] [17/18] Add huge pud support to mm/memory.c Andi Kleen
2008-03-17  1:58 ` [PATCH] [18/18] Implement hugepagesz= option for x86-64 Andi Kleen
2008-03-17  9:29   ` Paul Jackson
2008-03-17  9:59     ` Andi Kleen
2008-03-17 10:02       ` Paul Jackson
2008-03-17  3:11 ` [PATCH] [0/18] GB pages hugetlb support Paul Jackson
2008-03-17  7:00   ` Andi Kleen
2008-03-17  7:00     ` Paul Jackson
2008-03-17  7:29       ` Andi Kleen
2008-03-17  5:35 ` Paul Jackson
2008-03-17  6:58   ` Andi Kleen
2008-03-17  9:26 ` Paul Jackson
2008-03-17 15:05 ` Adam Litke
2008-03-17 15:33   ` Andi Kleen
2008-03-17 15:59     ` Adam Litke

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