linux-kernel - Re: [RFC][PATCH 0/9] extend hugepage migration

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: <514B9BD8.9050207@gmail.com>
Date:	Fri, 22 Mar 2013 07:46:32 +0800
From:	Simon Jeons <simon.jeons@...il.com>
To:	Michal Hocko <mhocko@...e.cz>
CC:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>, linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>, Hugh Dickins <hughd@...gle.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH 0/9] extend hugepage migration

Hi Michal,
On 03/21/2013 08:56 PM, Michal Hocko wrote:
> On Thu 21-03-13 07:49:48, Simon Jeons wrote:
> [...]
>> When I hacking arch/x86/mm/hugetlbpage.c like this,
>> diff --git a/arch/x86/mm/hugetlbpage.c b/arch/x86/mm/hugetlbpage.c
>> index ae1aa71..87f34ee 100644
>> --- a/arch/x86/mm/hugetlbpage.c
>> +++ b/arch/x86/mm/hugetlbpage.c
>> @@ -354,14 +354,13 @@ hugetlb_get_unmapped_area(struct file *file,
>> unsigned long addr,
>>
>> #endif /*HAVE_ARCH_HUGETLB_UNMAPPED_AREA*/
>>
>> -#ifdef CONFIG_X86_64
>> static __init int setup_hugepagesz(char *opt)
>> {
>> unsigned long ps = memparse(opt, &opt);
>> if (ps == PMD_SIZE) {
>> hugetlb_add_hstate(PMD_SHIFT - PAGE_SHIFT);
>> - } else if (ps == PUD_SIZE && cpu_has_gbpages) {
>> - hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
>> + } else if (ps == PUD_SIZE) {
>> + hugetlb_add_hstate(PMD_SHIFT - PAGE_SHIFT+4);
>> } else {
>> printk(KERN_ERR "hugepagesz: Unsupported page size %lu M\n",
>> ps >> 20);
>>
>> I set boot=hugepagesz=1G hugepages=10, then I got 10 32MB huge pages.
>> What's the difference between these pages which I hacking and normal
>> huge pages?
> How is this related to the patch set?
> Please _stop_ distracting discussion to unrelated topics!
>
> Nothing personal but this is just wasting our time.

Sorry kindly Michal, my bad.
Btw, could you explain this question for me? very sorry waste your time.


--
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/