From: Mark Rutland <mark.rutland@arm.com> To: Thomas Gleixner <tglx@linutronix.de> Cc: "Steven Price" <steven.price@arm.com>, x86@kernel.org, "Arnd Bergmann" <arnd@arndb.de>, "Ard Biesheuvel" <ard.biesheuvel@linaro.org>, "Peter Zijlstra" <peterz@infradead.org>, "Catalin Marinas" <catalin.marinas@arm.com>, "Dave Hansen" <dave.hansen@linux.intel.com>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Jérôme Glisse" <jglisse@redhat.com>, "Ingo Molnar" <mingo@redhat.com>, "Borislav Petkov" <bp@alien8.de>, "Andy Lutomirski" <luto@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>, "James Morse" <james.morse@arm.com>, "Will Deacon" <will@kernel.org>, "Andrew Morton" <akpm@linux-foundation.org>, linux-arm-kernel@lists.infradead.org, "Liang, Kan" <kan.liang@linux.intel.com> Subject: Re: [PATCH v9 00/21] Generic page walk and ptdump Date: Wed, 24 Jul 2019 15:07:35 +0100 [thread overview] Message-ID: <20190724140735.GD2624@lakrids.cambridge.arm.com> (raw) In-Reply-To: <alpine.DEB.2.21.1907241541570.1791@nanos.tec.linutronix.de> On Wed, Jul 24, 2019 at 03:57:33PM +0200, Thomas Gleixner wrote: > On Wed, 24 Jul 2019, Steven Price wrote: > > On 23/07/2019 11:16, Mark Rutland wrote: > > > Are there any visible changes to the arm64 output? > > > > arm64 output shouldn't change. I've confirmed that "efi_page_tables" is > > identical on a Juno before/after the change. "kernel_page_tables" > > obviously will vary depending on the exact layout of memory, but the > > format isn't changed. > > > > x86 output does change due to patch 14. In this case the change is > > removing the lines from the output of the form... > > > > > 0xffffffff84800000-0xffffffffa0000000 440M pmd > > > > ...which are unpopulated areas of the memory map. Populated lines which > > have attributes are unchanged. > > Having the hole size and the level in the dump is a very conveniant thing. Mhmm; I thought that we logged which level was empty on arm64 (but apparently not), since knowing the structure can be important. > Right now we have: > > 0xffffffffc0427000-0xffffffffc042b000 16K ro NX pte > 0xffffffffc042b000-0xffffffffc042e000 12K RW NX pte > 0xffffffffc042e000-0xffffffffc042f000 4K pte > 0xffffffffc042f000-0xffffffffc0430000 4K ro x pte > 0xffffffffc0430000-0xffffffffc0431000 4K ro NX pte > 0xffffffffc0431000-0xffffffffc0433000 8K RW NX pte > 0xffffffffc0433000-0xffffffffc0434000 4K pte > 0xffffffffc0434000-0xffffffffc0436000 8K ro x pte > 0xffffffffc0436000-0xffffffffc0438000 8K ro NX pte > 0xffffffffc0438000-0xffffffffc043a000 8K RW NX pte > 0xffffffffc043a000-0xffffffffc043f000 20K pte > 0xffffffffc043f000-0xffffffffc0444000 20K ro x pte > 0xffffffffc0444000-0xffffffffc0447000 12K ro NX pte > 0xffffffffc0447000-0xffffffffc0449000 8K RW NX pte > 0xffffffffc0449000-0xffffffffc044f000 24K pte > 0xffffffffc044f000-0xffffffffc0450000 4K ro x pte > 0xffffffffc0450000-0xffffffffc0451000 4K ro NX pte > 0xffffffffc0451000-0xffffffffc0453000 8K RW NX pte > 0xffffffffc0453000-0xffffffffc0458000 20K pte > 0xffffffffc0458000-0xffffffffc0459000 4K ro x pte > 0xffffffffc0459000-0xffffffffc045b000 8K ro NX pte > > with your change this becomes: > > 0xffffffffc0427000-0xffffffffc042b000 16K ro NX pte > 0xffffffffc042b000-0xffffffffc042e000 12K RW NX pte > 0xffffffffc042f000-0xffffffffc0430000 4K ro x pte > 0xffffffffc0430000-0xffffffffc0431000 4K ro NX pte > 0xffffffffc0431000-0xffffffffc0433000 8K RW NX pte > 0xffffffffc0434000-0xffffffffc0436000 8K ro x pte > 0xffffffffc0436000-0xffffffffc0438000 8K ro NX pte > 0xffffffffc0438000-0xffffffffc043a000 8K RW NX pte > 0xffffffffc043f000-0xffffffffc0444000 20K ro x pte > 0xffffffffc0444000-0xffffffffc0447000 12K ro NX pte > 0xffffffffc0447000-0xffffffffc0449000 8K RW NX pte > 0xffffffffc044f000-0xffffffffc0450000 4K ro x pte > 0xffffffffc0450000-0xffffffffc0451000 4K ro NX pte > 0xffffffffc0451000-0xffffffffc0453000 8K RW NX pte > 0xffffffffc0458000-0xffffffffc0459000 4K ro x pte > 0xffffffffc0459000-0xffffffffc045b000 8K ro NX pte > > which is 5 lines less, but a pain to figure out the size of the holes. And > it becomes even more painful when the holes go across different mapping > levels. I agree. Steven, could you align arm64 with the x86 behaviour here? Thanks, Mark.
WARNING: multiple messages have this Message-ID (diff)
From: Mark Rutland <mark.rutland@arm.com> To: Thomas Gleixner <tglx@linutronix.de> Cc: "Dave Hansen" <dave.hansen@linux.intel.com>, "Arnd Bergmann" <arnd@arndb.de>, "Ard Biesheuvel" <ard.biesheuvel@linaro.org>, "Peter Zijlstra" <peterz@infradead.org>, "Catalin Marinas" <catalin.marinas@arm.com>, x86@kernel.org, linux-kernel@vger.kernel.org, "Steven Price" <steven.price@arm.com>, linux-mm@kvack.org, "Jérôme Glisse" <jglisse@redhat.com>, "Ingo Molnar" <mingo@redhat.com>, "Borislav Petkov" <bp@alien8.de>, "Andy Lutomirski" <luto@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>, "James Morse" <james.morse@arm.com>, "Andrew Morton" <akpm@linux-foundation.org>, "Will Deacon" <will@kernel.org>, linux-arm-kernel@lists.infradead.org, "Liang, Kan" <kan.liang@linux.intel.com> Subject: Re: [PATCH v9 00/21] Generic page walk and ptdump Date: Wed, 24 Jul 2019 15:07:35 +0100 [thread overview] Message-ID: <20190724140735.GD2624@lakrids.cambridge.arm.com> (raw) In-Reply-To: <alpine.DEB.2.21.1907241541570.1791@nanos.tec.linutronix.de> On Wed, Jul 24, 2019 at 03:57:33PM +0200, Thomas Gleixner wrote: > On Wed, 24 Jul 2019, Steven Price wrote: > > On 23/07/2019 11:16, Mark Rutland wrote: > > > Are there any visible changes to the arm64 output? > > > > arm64 output shouldn't change. I've confirmed that "efi_page_tables" is > > identical on a Juno before/after the change. "kernel_page_tables" > > obviously will vary depending on the exact layout of memory, but the > > format isn't changed. > > > > x86 output does change due to patch 14. In this case the change is > > removing the lines from the output of the form... > > > > > 0xffffffff84800000-0xffffffffa0000000 440M pmd > > > > ...which are unpopulated areas of the memory map. Populated lines which > > have attributes are unchanged. > > Having the hole size and the level in the dump is a very conveniant thing. Mhmm; I thought that we logged which level was empty on arm64 (but apparently not), since knowing the structure can be important. > Right now we have: > > 0xffffffffc0427000-0xffffffffc042b000 16K ro NX pte > 0xffffffffc042b000-0xffffffffc042e000 12K RW NX pte > 0xffffffffc042e000-0xffffffffc042f000 4K pte > 0xffffffffc042f000-0xffffffffc0430000 4K ro x pte > 0xffffffffc0430000-0xffffffffc0431000 4K ro NX pte > 0xffffffffc0431000-0xffffffffc0433000 8K RW NX pte > 0xffffffffc0433000-0xffffffffc0434000 4K pte > 0xffffffffc0434000-0xffffffffc0436000 8K ro x pte > 0xffffffffc0436000-0xffffffffc0438000 8K ro NX pte > 0xffffffffc0438000-0xffffffffc043a000 8K RW NX pte > 0xffffffffc043a000-0xffffffffc043f000 20K pte > 0xffffffffc043f000-0xffffffffc0444000 20K ro x pte > 0xffffffffc0444000-0xffffffffc0447000 12K ro NX pte > 0xffffffffc0447000-0xffffffffc0449000 8K RW NX pte > 0xffffffffc0449000-0xffffffffc044f000 24K pte > 0xffffffffc044f000-0xffffffffc0450000 4K ro x pte > 0xffffffffc0450000-0xffffffffc0451000 4K ro NX pte > 0xffffffffc0451000-0xffffffffc0453000 8K RW NX pte > 0xffffffffc0453000-0xffffffffc0458000 20K pte > 0xffffffffc0458000-0xffffffffc0459000 4K ro x pte > 0xffffffffc0459000-0xffffffffc045b000 8K ro NX pte > > with your change this becomes: > > 0xffffffffc0427000-0xffffffffc042b000 16K ro NX pte > 0xffffffffc042b000-0xffffffffc042e000 12K RW NX pte > 0xffffffffc042f000-0xffffffffc0430000 4K ro x pte > 0xffffffffc0430000-0xffffffffc0431000 4K ro NX pte > 0xffffffffc0431000-0xffffffffc0433000 8K RW NX pte > 0xffffffffc0434000-0xffffffffc0436000 8K ro x pte > 0xffffffffc0436000-0xffffffffc0438000 8K ro NX pte > 0xffffffffc0438000-0xffffffffc043a000 8K RW NX pte > 0xffffffffc043f000-0xffffffffc0444000 20K ro x pte > 0xffffffffc0444000-0xffffffffc0447000 12K ro NX pte > 0xffffffffc0447000-0xffffffffc0449000 8K RW NX pte > 0xffffffffc044f000-0xffffffffc0450000 4K ro x pte > 0xffffffffc0450000-0xffffffffc0451000 4K ro NX pte > 0xffffffffc0451000-0xffffffffc0453000 8K RW NX pte > 0xffffffffc0458000-0xffffffffc0459000 4K ro x pte > 0xffffffffc0459000-0xffffffffc045b000 8K ro NX pte > > which is 5 lines less, but a pain to figure out the size of the holes. And > it becomes even more painful when the holes go across different mapping > levels. I agree. Steven, could you align arm64 with the x86 behaviour here? Thanks, Mark. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-07-24 14:07 UTC|newest] Thread overview: 129+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-07-22 15:41 [PATCH v9 00/21] Generic page walk and ptdump Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` [PATCH v9 01/21] arc: mm: Add p?d_leaf() definitions Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` [PATCH v9 02/21] arm: " Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` [PATCH v9 03/21] arm64: " Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` [PATCH v9 04/21] mips: " Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 21:47 ` Paul Burton 2019-07-22 21:47 ` Paul Burton 2019-07-24 13:03 ` Steven Price 2019-07-24 13:03 ` Steven Price 2019-07-22 15:41 ` [PATCH v9 05/21] powerpc: " Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` [PATCH v9 06/21] riscv: " Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` [PATCH v9 07/21] s390: " Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` [PATCH v9 08/21] sparc: " Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` [PATCH v9 09/21] x86: " Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-22 15:41 ` [PATCH v9 10/21] mm: Add generic p?d_leaf() macros Steven Price 2019-07-22 15:41 ` Steven Price 2019-07-23 9:41 ` Mark Rutland 2019-07-23 9:41 ` Mark Rutland 2019-07-24 13:48 ` Steven Price 2019-07-24 13:48 ` Steven Price 2019-07-28 11:44 ` Anshuman Khandual 2019-07-28 11:44 ` Anshuman Khandual 2019-07-29 11:38 ` Steven Price 2019-07-29 11:38 ` Steven Price 2019-08-01 6:09 ` Anshuman Khandual 2019-08-01 6:09 ` Anshuman Khandual 2019-08-01 12:22 ` Steven Price 2019-08-01 12:22 ` Steven Price 2019-07-29 12:50 ` Mark Rutland 2019-07-29 12:50 ` Mark Rutland 2019-08-01 6:13 ` Anshuman Khandual 2019-08-01 6:13 ` Anshuman Khandual 2019-07-22 15:42 ` [PATCH v9 11/21] mm: pagewalk: Add p4d_entry() and pgd_entry() Steven Price 2019-07-22 15:42 ` Steven Price 2019-07-23 10:14 ` Mark Rutland 2019-07-23 10:14 ` Mark Rutland 2019-07-24 13:53 ` Steven Price 2019-07-24 13:53 ` Steven Price 2019-07-24 14:09 ` Mark Rutland 2019-07-24 14:09 ` Mark Rutland 2019-07-28 12:33 ` Anshuman Khandual 2019-07-28 12:33 ` Anshuman Khandual 2019-07-29 12:17 ` Steven Price 2019-07-29 12:17 ` Steven Price 2019-07-22 15:42 ` [PATCH v9 12/21] mm: pagewalk: Allow walking without vma Steven Price 2019-07-22 15:42 ` Steven Price 2019-07-28 14:20 ` Anshuman Khandual 2019-07-28 14:20 ` Anshuman Khandual 2019-07-29 12:29 ` Steven Price 2019-07-29 12:29 ` Steven Price 2019-08-01 6:41 ` Anshuman Khandual 2019-08-01 6:41 ` Anshuman Khandual 2019-07-22 15:42 ` [PATCH v9 13/21] mm: pagewalk: Add test_p?d callbacks Steven Price 2019-07-22 15:42 ` Steven Price 2019-07-28 13:41 ` Anshuman Khandual 2019-07-28 13:41 ` Anshuman Khandual 2019-07-29 12:34 ` Steven Price 2019-07-29 12:34 ` Steven Price 2019-07-22 15:42 ` [PATCH v9 14/21] x86: mm: Don't display pages which aren't present in debugfs Steven Price 2019-07-22 15:42 ` Steven Price 2019-07-22 15:42 ` [PATCH v9 15/21] x86: mm: Point to struct seq_file from struct pg_state Steven Price 2019-07-22 15:42 ` Steven Price 2019-07-22 15:42 ` [PATCH v9 16/21] x86: mm+efi: Convert ptdump_walk_pgd_level() to take a mm_struct Steven Price 2019-07-22 15:42 ` Steven Price 2019-07-22 15:42 ` [PATCH v9 17/21] x86: mm: Convert ptdump_walk_pgd_level_debugfs() to take an mm_struct Steven Price 2019-07-22 15:42 ` Steven Price 2019-07-22 15:42 ` [PATCH v9 18/21] x86: mm: Convert ptdump_walk_pgd_level_core() " Steven Price 2019-07-22 15:42 ` Steven Price 2019-07-22 15:42 ` [PATCH v9 19/21] mm: Add generic ptdump Steven Price 2019-07-22 15:42 ` Steven Price 2019-07-23 9:57 ` Mark Rutland 2019-07-23 9:57 ` Mark Rutland 2019-07-24 16:36 ` Steven Price 2019-07-24 16:36 ` Steven Price 2019-07-29 2:59 ` Anshuman Khandual 2019-07-29 2:59 ` Anshuman Khandual 2019-07-29 13:56 ` Steven Price 2019-07-29 13:56 ` Steven Price 2019-07-22 15:42 ` [PATCH v9 20/21] x86: mm: Convert dump_pagetables to use walk_page_range Steven Price 2019-07-22 15:42 ` Steven Price 2019-07-22 15:42 ` [PATCH v9 21/21] arm64: mm: Convert mm/dump.c to use walk_page_range() Steven Price 2019-07-22 15:42 ` Steven Price 2019-07-23 6:39 ` [PATCH v9 00/21] Generic page walk and ptdump Anshuman Khandual 2019-07-23 6:39 ` Anshuman Khandual 2019-07-24 13:35 ` Steven Price 2019-07-24 13:35 ` Steven Price 2019-07-25 9:09 ` Anshuman Khandual 2019-07-25 9:09 ` Anshuman Khandual 2019-07-25 9:30 ` Will Deacon 2019-07-25 9:30 ` Will Deacon 2019-07-26 6:03 ` Anshuman Khandual 2019-07-26 6:03 ` Anshuman Khandual 2019-07-25 10:15 ` Steven Price 2019-07-25 10:15 ` Steven Price 2019-07-23 10:16 ` Mark Rutland 2019-07-23 10:16 ` Mark Rutland 2019-07-24 13:35 ` Steven Price 2019-07-24 13:35 ` Steven Price 2019-07-24 13:57 ` Thomas Gleixner 2019-07-24 13:57 ` Thomas Gleixner 2019-07-24 14:07 ` Mark Rutland [this message] 2019-07-24 14:07 ` Mark Rutland 2019-07-24 14:18 ` Steven Price 2019-07-24 14:18 ` Steven Price 2019-07-24 14:37 ` Thomas Gleixner 2019-07-24 14:37 ` Thomas Gleixner 2019-07-28 11:20 ` Anshuman Khandual 2019-07-28 11:20 ` Anshuman Khandual 2019-07-29 11:32 ` Steven Price 2019-07-29 11:32 ` Steven Price 2019-07-31 9:27 ` Sven Schnelle 2019-07-31 9:27 ` Sven Schnelle 2019-07-31 11:18 ` Steven Price 2019-07-31 11:18 ` Steven Price
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