From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Tue, 31 May 2016 14:15:20 +0100 Subject: [BUG] Page allocation failures with newest kernels In-Reply-To: <60e8df74202e40b28a4d53dbc7fd0b22@IL-EXCH02.marvell.com> References: <574D64A0.2070207@arm.com> <60e8df74202e40b28a4d53dbc7fd0b22@IL-EXCH02.marvell.com> Message-ID: <20160531131520.GI24936@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, May 31, 2016 at 01:10:44PM +0000, Yehuda Yitschak wrote: > During some of the stress tests we also came across a different warning > from the arm64 page management code > It looks like a race is detected between HW and SW marking a bit in the PTE A72 (which I believe is the CPU in that SoC) is a v8.0 CPU and therefore doesn't have hardware DBM. > Not sure it's really related but I thought it might give a clue on the issue > http://pastebin.com/ASv19vZP There have been a few patches from Catalin to fix up the hardware DBM patches, so it might be worth trying to reproduce this failure with a more recent kernel. I doubt this is related to the allocation failures, however. Will