[next-20150119]regression (mm)?
From: nm@ti.com (Nishanth Menon)
Date: 2015-01-20 23:26:22
Also in:
linux-mm, linux-next, linux-omap
On 16:05-20150120, Kirill A. Shutemov wrote:
quoted hunk ↗ jump to hunk
Russell King - ARM Linux wrote:quoted
On Tue, Jan 20, 2015 at 02:16:43AM +0200, Kirill A. Shutemov wrote:quoted
Better option would be converting 2-lvl ARM configuration to <asm-generic/pgtable-nopmd.h>, but I'm not sure if it's possible.Well, IMHO the folded approach in asm-generic was done the wrong way which barred ARM from ever using it.Okay, I see. Regarding the topic bug. Completely untested patch is below. Could anybody check if it helps? From 34b9182d08ef2b541829e305fcc91ef1d26b27ea Mon Sep 17 00:00:00 2001 From: "Kirill A. Shutemov" <redacted> Date: Tue, 20 Jan 2015 15:47:22 +0200 Subject: [PATCH] arm: define __PAGETABLE_PMD_FOLDED for !LPAE ARM uses custom implementation of PMD folding in 2-level page table case. Generic code expects to see __PAGETABLE_PMD_FOLDED to be defined if PMD is folded, but ARM doesn't do this. Let's fix it. Defining __PAGETABLE_PMD_FOLDED will drop out unused __pmd_alloc(). It also fixes problems with recently-introduced pmd accounting on ARM without LPAE. Signed-off-by: Kirill A. Shutemov <redacted> Reported-by: Nishanth Menon <nm@ti.com> --- arch/arm/include/asm/pgtable-2level.h | 2 ++ 1 file changed, 2 insertions(+)diff --git a/arch/arm/include/asm/pgtable-2level.h b/arch/arm/include/asm/pgtable-2level.h index bcc5e300413f..bfd662e49a25 100644 --- a/arch/arm/include/asm/pgtable-2level.h +++ b/arch/arm/include/asm/pgtable-2level.h@@ -10,6 +10,8 @@ #ifndef _ASM_PGTABLE_2LEVEL_H #define _ASM_PGTABLE_2LEVEL_H +#define __PAGETABLE_PMD_FOLDED + /* * Hardware-wise, we have a two level page table structure, where the first * level has 4096 entries, and the second level has 256 entries. Each entry-- 2.1.4
Above helps the TI platforms 1: am335x-evm: BOOT: PASS: am335x-evm.txt 2: am335x-sk: BOOT: PASS: am335x-sk.txt 3: am3517-evm: BOOT: PASS: am3517-evm.txt 4: am37x-evm: BOOT: PASS: am37x-evm.txt 5: am437x-sk: BOOT: PASS: am437x-sk.txt 6: am43xx-epos: BOOT: PASS: am43xx-epos.txt 7: am43xx-gpevm: BOOT: PASS: am43xx-gpevm.txt 8: BeagleBoard-X15(am57xx-evm): BOOT: PASS: am57xx-evm.txt 9: BeagleBoard-XM: BOOT: PASS: beagleboard.txt 10: beagleboard-vanilla: BOOT: PASS: beagleboard-vanilla.txt 11: beaglebone-black: BOOT: PASS: beaglebone-black.txt 12: beaglebone: BOOT: PASS: beaglebone.txt 13: craneboard: BOOT: PASS: craneboard.txt 14: dra72x-evm: BOOT: PASS: dra72x-evm.txt 15: dra7xx-evm: BOOT: PASS: dra7xx-evm.txt 16: OMAP3430-Labrador(LDP): BOOT: PASS: ldp.txt 17: n900: BOOT: FAIL: n900.txt (legacy issue with my farm) 18: omap5-evm: BOOT: PASS: omap5-evm.txt 19: pandaboard-es: BOOT: PASS: pandaboard-es.txt 20: pandaboard-vanilla: BOOT: PASS: pandaboard-vanilla.txt 21: sdp2430: BOOT: PASS: sdp2430.txt 22: sdp3430: BOOT: PASS: sdp3430.txt 23: sdp4430: BOOT: PASS: sdp4430.txt TOTAL = 23 boards, Booted Boards = 22, No Boot boards = 1 please feel free to add my Tested-by: Nishanth Menon <nm@ti.com> -- Regards, Nishanth Menon