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, 19 Oct 2011 22:19:52 -0700 (PDT) From: David Rientjes <rientjes@...gle.com> To: Mel Gorman <mgorman@...e.de> cc: Greg KH <greg@...ah.com>, Andrew Morton <akpm@...ux-foundation.org>, linux-mm <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>, nfont@...ux.vnet.ibm.com, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> Subject: Re: [PATCH] mm: memory hotplug: Check if pages are correctly reserved on a per-section basis On Mon, 17 Oct 2011, Mel Gorman wrote: > (Resending as I am not seeing it in -next so maybe it got lost) > > mm: memory hotplug: Check if pages are correctly reserved on a per-section basis > > It is expected that memory being brought online is PageReserved > similar to what happens when the page allocator is being brought up. > Memory is onlined in "memory blocks" which consist of one or more > sections. Unfortunately, the code that verifies PageReserved is > currently assuming that the memmap backing all these pages is virtually > contiguous which is only the case when CONFIG_SPARSEMEM_VMEMMAP is set. > As a result, memory hot-add is failing on those configurations with > the message; > > kernel: section number XXX page number 256 not reserved, was it already online? > > This patch updates the PageReserved check to lookup struct page once > per section to guarantee the correct struct page is being checked. > > [Check pages within sections properly: rientjes@...gle.com] > [original patch by: nfont@...ux.vnet.ibm.com] > Signed-off-by: Mel Gorman <mgorman@...e.de> Acked-by: David Rientjes <rientjes@...gle.com> -- 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