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  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]
Date:	Fri, 8 Aug 2014 15:22:07 +0900
From:	Joonsoo Kim <>
To:	Vlastimil Babka <>
Cc:	Andrew Morton <>,
	"Kirill A. Shutemov" <>,
	Rik van Riel <>, Mel Gorman <>,
	Johannes Weiner <>,
	Minchan Kim <>,
	Yasuaki Ishimatsu <>,
	Zhang Yanfei <>,
	"Srivatsa S. Bhat" <>,
	Tang Chen <>,
	Naoya Horiguchi <>,
	Bartlomiej Zolnierkiewicz <>,
	Wen Congyang <>,
	Marek Szyprowski <>,
	Michal Nazarewicz <>,
	Laura Abbott <>,
	Heesub Shin <>,
	"Aneesh Kumar K.V" <>,
	Ritesh Harjani <>,, Gioh Kim <>,,
Subject: Re: [PATCH v2 2/8] mm/isolation: remove unstable check for isolated

On Thu, Aug 07, 2014 at 03:49:17PM +0200, Vlastimil Babka wrote:
> On 08/06/2014 09:18 AM, Joonsoo Kim wrote:
> >The check '!PageBuddy(page) && page_count(page) == 0 &&
> >migratetype == MIGRATE_ISOLATE' would mean the page on free processing.
> What is "the page on free processing"? I thought this test means the
> page is on some CPU's pcplist?

Yes, you are right.

> >Although it could go into buddy allocator within a short time,
> >futher operation such as isolate_freepages_range() in CMA, called after
> >test_page_isolated_in_pageblock(), could be failed due to this unstability
> By "unstability" you mean the page can be allocated again from the
> pcplist instead of being freed to buddy list?


> >since it requires that the page is on buddy. I think that removing
> >this unstability is good thing.
> >
> >And, following patch makes isolated freepage has new status matched with
> >this condition and this check is the obstacle to that change. So remove
> >it.
> You could also say that pages from isolated pageblocks can no longer
> appear on pcplists after the later patches.

Okay. I will do it.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists