linux-kernel - Re: [PATCH -V8 14/16] hugetlb/cgroup: add charge/uncharge calls for HugeTLB alloc/free

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Sat, 9 Jun 2012 11:23:01 +0200
From:	Johannes Weiner <hannes@...xchg.org>
To:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc:	linux-mm@...ck.org, kamezawa.hiroyu@...fujitsu.com,
	dhillf@...il.com, rientjes@...gle.com, mhocko@...e.cz,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	cgroups@...r.kernel.org
Subject: Re: [PATCH -V8 14/16] hugetlb/cgroup: add charge/uncharge calls for
 HugeTLB alloc/free

On Sat, Jun 09, 2012 at 02:29:59PM +0530, Aneesh Kumar K.V wrote:
> From: "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
> 
> This adds necessary charge/uncharge calls in the HugeTLB code.  We do
> hugetlb cgroup charge in page alloc and uncharge in compound page destructor.
> 
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
> ---
>  mm/hugetlb.c        |   16 +++++++++++++++-
>  mm/hugetlb_cgroup.c |    7 +------
>  2 files changed, 16 insertions(+), 7 deletions(-)
> 
> diff --git a/mm/hugetlb.c b/mm/hugetlb.c
> index bf79131..4ca92a9 100644
> --- a/mm/hugetlb.c
> +++ b/mm/hugetlb.c
> @@ -628,6 +628,8 @@ static void free_huge_page(struct page *page)
>  	BUG_ON(page_mapcount(page));
>  
>  	spin_lock(&hugetlb_lock);
> +	hugetlb_cgroup_uncharge_page(hstate_index(h),
> +				     pages_per_huge_page(h), page);

hugetlb_cgroup_uncharge_page() takes the hugetlb_lock, no?

It's quite hard to review code that is split up like this.  Please
always keep the introduction of new functions in the same patch that
adds the callsite(s).
--
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/