linux-kernel - Re: [PATCH] generic debug pagealloc

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]

Message-ID: <20090304141721.GC7168@localhost.localdomain>
Date:	Wed, 4 Mar 2009 23:17:23 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH] generic debug pagealloc

On Tue, Mar 03, 2009 at 01:36:10PM -0800, Andrew Morton wrote:
> Alternatively, we could just not do the kmap_atomic() at all.  i386
> won't be using this code and IIRC the only other highmem architecture
> is powerpc32, and ppc32 appears to also have its own DEBUG_PAGEALLOC
> implementation.  So you could remove the kmap_atomic() stuff and put
> 
> #ifdef CONFIG_HIGHMEM
> #error i goofed
> #endif
> 
> in there.

I'll take the variant of this. Then poison_page() will be

static void poison_page(struct page *page)
{
        void *addr;

        if (PageHighmem(page))
                return; // i goofed

       page->poison = true;
       addr = page_address(page);
       memset(addr, PAGE_POISON, PAGE_SIZE);
}
--
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/