linux-kernel - Re: [PATCH v3 11/13] mm, compaction: pass gfp mask to compact

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <53A7F406.6080309@cn.fujitsu.com>
Date:	Mon, 23 Jun 2014 17:31:50 +0800
From:	Zhang Yanfei <zhangyanfei@...fujitsu.com>
To:	Vlastimil Babka <vbabka@...e.cz>
CC:	<linux-mm@...ck.org>, Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Minchan Kim <minchan@...nel.org>, Mel Gorman <mgorman@...e.de>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Michal Nazarewicz <mina86@...a86.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Christoph Lameter <cl@...ux.com>,
	Rik van Riel <riel@...hat.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 11/13] mm, compaction: pass gfp mask to compact_control

On 06/20/2014 11:49 PM, Vlastimil Babka wrote:
> From: David Rientjes <rientjes@...gle.com>
> 
> struct compact_control currently converts the gfp mask to a migratetype, but we
> need the entire gfp mask in a follow-up patch.
> 
> Pass the entire gfp mask as part of struct compact_control.
> 
> Signed-off-by: David Rientjes <rientjes@...gle.com>
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
> Cc: Minchan Kim <minchan@...nel.org>
> Cc: Mel Gorman <mgorman@...e.de>
> Cc: Joonsoo Kim <iamjoonsoo.kim@....com>
> Cc: Michal Nazarewicz <mina86@...a86.com>
> Cc: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
> Cc: Christoph Lameter <cl@...ux.com>
> Cc: Rik van Riel <riel@...hat.com>

Reviewed-by: Zhang Yanfei <zhangyanfei@...fujitsu.com>

> ---
>  mm/compaction.c | 12 +++++++-----
>  mm/internal.h   |  2 +-
>  2 files changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/mm/compaction.c b/mm/compaction.c
> index 32c768b..d4e0c13 100644
> --- a/mm/compaction.c
> +++ b/mm/compaction.c
> @@ -975,8 +975,8 @@ static isolate_migrate_t isolate_migratepages(struct zone *zone,
>  	return cc->nr_migratepages ? ISOLATE_SUCCESS : ISOLATE_NONE;
>  }
>  
> -static int compact_finished(struct zone *zone,
> -			    struct compact_control *cc)
> +static int compact_finished(struct zone *zone, struct compact_control *cc,
> +			    const int migratetype)
>  {
>  	unsigned int order;
>  	unsigned long watermark;
> @@ -1022,7 +1022,7 @@ static int compact_finished(struct zone *zone,
>  		struct free_area *area = &zone->free_area[order];
>  
>  		/* Job done if page is free of the right migratetype */
> -		if (!list_empty(&area->free_list[cc->migratetype]))
> +		if (!list_empty(&area->free_list[migratetype]))
>  			return COMPACT_PARTIAL;
>  
>  		/* Job done if allocation would set block type */
> @@ -1088,6 +1088,7 @@ static int compact_zone(struct zone *zone, struct compact_control *cc)
>  	int ret;
>  	unsigned long start_pfn = zone->zone_start_pfn;
>  	unsigned long end_pfn = zone_end_pfn(zone);
> +	const int migratetype = gfpflags_to_migratetype(cc->gfp_mask);
>  	const bool sync = cc->mode != MIGRATE_ASYNC;
>  
>  	ret = compaction_suitable(zone, cc->order);
> @@ -1130,7 +1131,8 @@ static int compact_zone(struct zone *zone, struct compact_control *cc)
>  
>  	migrate_prep_local();
>  
> -	while ((ret = compact_finished(zone, cc)) == COMPACT_CONTINUE) {
> +	while ((ret = compact_finished(zone, cc, migratetype)) ==
> +						COMPACT_CONTINUE) {
>  		int err;
>  
>  		switch (isolate_migratepages(zone, cc)) {
> @@ -1185,7 +1187,7 @@ static unsigned long compact_zone_order(struct zone *zone, int order,
>  		.nr_freepages = 0,
>  		.nr_migratepages = 0,
>  		.order = order,
> -		.migratetype = gfpflags_to_migratetype(gfp_mask),
> +		.gfp_mask = gfp_mask,
>  		.zone = zone,
>  		.mode = mode,
>  	};
> diff --git a/mm/internal.h b/mm/internal.h
> index 584cd69..dd17a40 100644
> --- a/mm/internal.h
> +++ b/mm/internal.h
> @@ -149,7 +149,7 @@ struct compact_control {
>  	bool finished_update_migrate;
>  
>  	int order;			/* order a direct compactor needs */
> -	int migratetype;		/* MOVABLE, RECLAIMABLE etc */
> +	const gfp_t gfp_mask;		/* gfp mask of a direct compactor */
>  	struct zone *zone;
>  	enum compact_contended contended; /* Signal need_sched() or lock
>  					   * contention detected during
> 


-- 
Thanks.
Zhang Yanfei
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/