linux-kernel - Re: [PATCH, RFC 06/16] thp, mm: rewrite add_to_page_cache

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:	Tue, 29 Jan 2013 20:11:01 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Wu Fengguang <fengguang.wu@...el.com>, Jan Kara <jack@...e.cz>,
	Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org,
	Andi Kleen <ak@...ux.intel.com>,
	Matthew Wilcox <matthew.r.wilcox@...el.com>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH, RFC 06/16] thp, mm: rewrite add_to_page_cache_locked() to
 support huge pages

On Mon, Jan 28, 2013 at 5:24 PM, Kirill A. Shutemov
<kirill.shutemov@...ux.intel.com> wrote:
> @@ -443,6 +443,7 @@ int add_to_page_cache_locked(struct page *page, struct address_space *mapping,
>                 pgoff_t offset, gfp_t gfp_mask)
>  {
>         int error;
> +       int nr = 1;
>
>         VM_BUG_ON(!PageLocked(page));
>         VM_BUG_ON(PageSwapBacked(page));
> @@ -450,31 +451,61 @@ int add_to_page_cache_locked(struct page *page, struct address_space *mapping,
>         error = mem_cgroup_cache_charge(page, current->mm,
>                                         gfp_mask & GFP_RECLAIM_MASK);
>         if (error)
> -               goto out;
> +               return error;

Due to PageCompound check, thp could not be charged effectively.
Any change added for charging it?
--
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/