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
| ||
|
Date: Wed, 08 Feb 2012 10:21:18 +0100 From: "Michal Nazarewicz" <mina86@...a86.com> To: "Mel Gorman" <mel@....ul.ie>, "sandeep patil" <psandeep.s@...il.com> Cc: "Marek Szyprowski" <m.szyprowski@...sung.com>, "Ohad Ben-Cohen" <ohad@...ery.com>, "Daniel Walker" <dwalker@...eaurora.org>, "Russell King" <linux@....linux.org.uk>, "Arnd Bergmann" <arnd@...db.de>, "Jesse Barker" <jesse.barker@...aro.org>, "Jonathan Corbet" <corbet@....net>, linux-kernel@...r.kernel.org, "Dave Hansen" <dave@...ux.vnet.ibm.com>, linaro-mm-sig@...ts.linaro.org, linux-mm@...ck.org, "Kyungmin Park" <kyungmin.park@...sung.com>, "KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>, "Andrew Morton" <akpm@...ux-foundation.org>, "Rob Clark" <rob.clark@...aro.org>, linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org Subject: Re: [Linaro-mm-sig] [PATCH 11/15] mm: trigger page reclaim in alloc_contig_range() to stabilize watermarks On Wed, 08 Feb 2012 03:04:18 +0100, sandeep patil <psandeep.s@...il.com> wrote: > There's another problem I am facing with zone watermarks and CMA. > > Test details: > Memory : 480 MB of total memory, 128 MB CMA region > Test case : around 600 MB of file transfer over USB RNDIS onto target > System Load : ftpd with console running on target. > No one is doing CMA allocations except for the DMA allocations done by the > drivers. > > Result : After about 300MB transfer, I start getting GFP_ATOMIC > allocation failures. This only happens if CMA region is reserved. [...] > Total memory available is way above the zone watermarks. So, we ended > up starving > UNMOVABLE/RECLAIMABLE atomic allocations that cannot fallback on CMA region. This looks like something Mel warned me about. I don't really have a good solution for that yet. ;/ -- Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o ..o | Computer Science, Michał “mina86” Nazarewicz (o o) ooo +----<email/xmpp: mpn@...gle.com>--------------ooO--(_)--Ooo-- -- 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/
Powered by blists - more mailing lists