From mboxrd@z Thu Jan 1 00:00:00 1970 From: mark.rutland@arm.com (Mark Rutland) Date: Tue, 1 Mar 2016 11:32:51 +0000 Subject: for-next/pgtable branch: OOM error with 16K page size In-Reply-To: References: Message-ID: <20160301113250.GA30602@leverpostej> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi, On Tue, Mar 01, 2016 at 10:48:02AM +0000, Jaggi, Manish wrote: > > >>From: linux-arm-kernel on behalf of Jaggi, Manish > >>Sent: Monday, February 29, 2016 5:56 PM > >>To: linux-arm-kernel at lists.infradead.org > >>Subject: for-next/pgtable branch: OOM error with 16K page size > >> > >>Hi All, > >> > >>I am trying to use the for-next/pgtable branch with the top commit, > > The same issue is observed with for-next/core branch I take it that you do not see this issue on v4.5-rc4? > >>commit 068a17a5805dfbca4bbf03e664ca6b19709cc7a8 > >>Author: Mark Rutland > >>Date: Mon Jan 25 11:45:12 2016 +0000 > >> > >> arm64: mm: create new fine-grained mappings at boot > >> > >>Setup: ARMv8, Cavium ThunderX, 48Cores 64G ram. > >>linux config: defconfig + 16k page size. > >> > >>Observations: > >>a) During linux boot I see some oom messages > >>http://pastebin.com/8jSMFhqf > >> Could you try again with "efi=debug"? If possible, also "memblock=debug", though the latter will hugely increase the dmesg output. > >>b) cat /proc/meminfo > >> > >>MemTotal: 66613760 kB > >>MemFree: 307328 kB > >>MemAvailable: 22416 kB > >> > >>Available memory is very less compared to total. > >> > >>c) With 64K pagesize > >>MemTotal: 66831552 kB > >>MemFree: 3541184 kB > >>MemAvailable: 3298752 kB The former does look very odd. Could you dump the full contents of /proc/meminfo for both of these cases? Thanks, Mark.