From: Greg KH <greg@kroah.com>
To: Mark Brown <broonie@kernel.org>
Cc: Alex Shi <alex.shi@linaro.org>,
Marc Zyngier <marc.zyngier@arm.com>,
Will Deacon <will.deacon@arm.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Catalin Marinas <catalin.marinas@arm.com>,
stable@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/29] arm meltdown fix backporting review for lts 4.9
Date: Tue, 13 Mar 2018 11:03:16 +0100 [thread overview]
Message-ID: <20180313100316.GA1999@kroah.com> (raw)
In-Reply-To: <20180306213129.GG13586@sirena.org.uk>
On Tue, Mar 06, 2018 at 09:31:29PM +0000, Mark Brown wrote:
> On Tue, Mar 06, 2018 at 09:25:25AM -0800, Greg KH wrote:
> > On Tue, Mar 06, 2018 at 02:26:34PM +0000, Mark Brown wrote:
> > Really? Like what? Last I looked it's only about 300 or so patches.
> > Something like less than .5% of the normal SoC backport size for any ARM
> > system recently. There were some numbers published a few months ago
> > about the real count, I can dig them up if you are curious.
>
> Really.
>
> The Android tree is making non-trivial modifications adding new features
> in core bits of the kernel like the scheduler - that's got an impact
> which will have follow on validation costs if it's not introduced early
> on in the process.
Ah crap, I forgot all about the scheduler mess. Sorry about that, I've
been focusing on device-specific stuff too much (nothing I much care
lives outside of drivers/...)
So you are right, for some types of devices, the andoid-common tree
isn't the best idea. However, the validation "costs" better be starting
all over based on the intrusiveness of these patches, they are
non-trivial :(
thanks,
greg k-h
next prev parent reply other threads:[~2018-03-13 10:03 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-28 3:56 [PATCH 0/29] arm meltdown fix backporting review for lts 4.9 Alex Shi
2018-02-28 3:56 ` [PATCH 01/29] arm64: mm: Use non-global mappings for kernel space Alex Shi
2018-02-28 12:08 ` Greg KH
2018-03-01 11:53 ` Alex Shi
2018-02-28 3:56 ` [PATCH 02/29] arm64: mm: Move ASID from TTBR0 to TTBR1 Alex Shi
2018-02-28 3:56 ` [PATCH 03/29] arm64: mm: Allocate ASIDs in pairs Alex Shi
2018-02-28 3:56 ` [PATCH 04/29] arm64: mm: Add arm64_kernel_unmapped_at_el0 helper Alex Shi
2018-02-28 3:56 ` [PATCH 05/29] arm64: mm: Invalidate both kernel and user ASIDs when performing TLBI Alex Shi
2018-02-28 3:56 ` [PATCH 06/29] arm64: factor out entry stack manipulation Alex Shi
2018-02-28 3:56 ` [PATCH 07/29] arm64: entry.S: move SError handling into a C function for future expansion Alex Shi
2018-02-28 3:56 ` [PATCH 08/29] module: extend 'rodata=off' boot cmdline parameter to module mappings Alex Shi
2018-02-28 3:56 ` [PATCH 09/29] arm64: entry: Add exception trampoline page for exceptions from EL0 Alex Shi
2018-02-28 3:56 ` [PATCH 10/29] arm64: mm: Map entry trampoline into trampoline and kernel page tables Alex Shi
2018-02-28 3:56 ` [PATCH 11/29] arm64: entry: Explicitly pass exception level to kernel_ventry macro Alex Shi
2018-02-28 3:56 ` [PATCH 12/29] arm64: entry: Hook up entry trampoline to exception vectors Alex Shi
2018-02-28 3:56 ` [PATCH 13/29] arm64: tls: Avoid unconditional zeroing of tpidrro_el0 for native tasks Alex Shi
2018-02-28 3:56 ` [PATCH 14/29] arm64: entry: Add fake CPU feature for unmapping the kernel at EL0 Alex Shi
2018-02-28 3:56 ` [PATCH 15/29] arm64: kaslr: Put kernel vectors address in separate data page Alex Shi
2018-02-28 3:56 ` [PATCH 16/29] arm64: use RET instruction for exiting the trampoline Alex Shi
2018-02-28 3:56 ` [PATCH 17/29] arm64: Kconfig: Add CONFIG_UNMAP_KERNEL_AT_EL0 Alex Shi
2018-02-28 3:56 ` [PATCH 18/29] arm64: Kconfig: Reword UNMAP_KERNEL_AT_EL0 kconfig entry Alex Shi
2018-02-28 3:56 ` [PATCH 19/29] arm64: Take into account ID_AA64PFR0_EL1.CSV3 Alex Shi
2018-02-28 3:56 ` [PATCH 20/29] arm64: Allow checking of a CPU-local erratum Alex Shi
2018-02-28 3:56 ` [PATCH 21/29] arm64: capabilities: Handle duplicate entries for a capability Alex Shi
2018-02-28 3:56 ` [PATCH 22/29] arm64: cputype: Add missing MIDR values for Cortex-A72 and Cortex-A75 Alex Shi
2018-02-28 3:56 ` [PATCH 23/29] arm64: cputype: Add MIDR values for Cavium ThunderX2 CPUs Alex Shi
2018-02-28 3:56 ` [PATCH 24/29] arm64: Turn on KPTI only on CPUs that need it Alex Shi
2018-02-28 3:56 ` [PATCH 25/29] arm64: kpti: Make use of nG dependent on arm64_kernel_unmapped_at_el0() Alex Shi
2018-02-28 3:56 ` [PATCH 26/29] arm64: kpti: Add ->enable callback to remap swapper using nG mappings Alex Shi
2018-02-28 3:56 ` [PATCH 27/29] arm64: Force KPTI to be disabled on Cavium ThunderX Alex Shi
2018-02-28 3:56 ` [PATCH 28/29] arm64: entry: Reword comment about post_ttbr_update_workaround Alex Shi
2018-02-28 3:56 ` [PATCH 29/29] arm64: idmap: Use "awx" flags for .idmap.text .pushsection directives Alex Shi
2018-02-28 4:02 ` [PATCH 0/29] arm meltdown fix backporting review for lts 4.9 Alex Shi
2018-03-01 15:24 ` Greg KH
2018-03-02 9:14 ` Alex Shi
2018-03-02 10:32 ` Marc Zyngier
2018-03-02 16:54 ` Greg KH
2018-03-05 12:46 ` Mark Brown
2018-03-05 13:08 ` Greg KH
2018-03-06 14:26 ` Mark Brown
2018-03-06 17:25 ` Greg KH
2018-03-06 21:31 ` Mark Brown
2018-03-13 10:03 ` Greg KH [this message]
2018-03-07 4:43 ` Alex Shi
2018-03-07 3:27 ` Alex Shi
2018-03-07 18:24 ` Ard Biesheuvel
2018-03-13 10:04 ` Greg KH
2018-03-13 10:13 ` Ard Biesheuvel
2018-03-13 10:38 ` Greg KH
2018-03-13 13:01 ` Ard Biesheuvel
2018-03-13 13:25 ` Greg KH
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