Re: [PATCH] arm64: Introduction of support for 16K page with 3-level table support
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On Fri, Aug 2, 2024 at 2:13 PM <devel-request(a)lists.crash-utility.osci.io>
wrote:
Date: Thu, 1 Aug 2024 18:30:36 +1200
From: Tao Liu <ltao(a)redhat.com>
Subject: [Crash-utility] Re: [PATCH] arm64: Introduction of support
for 16K page with 3-level table support
To: kuan-ying.lee(a)canonical.com
Cc: devel(a)lists.crash-utility.osci.io
Message-ID:
<CAO7dBbVR-7t24f8=
h07QF-Hxdo_D1NdijUDZHngvkUYiMqpiJA(a)mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Hi kuan-ying,
On Thu, Jul 25, 2024 at 2:53 PM Tao Liu <ltao(a)redhat.com> wrote:
>
> Hi Kuan-Ying,
>
> On Thu, Jul 25, 2024 at 2:44 PM <kuan-ying.lee(a)canonical.com> wrote:
> >
> > Hi crash maintainers,
> >
> > Could you please help review this patch that supports 16K page size
with a 3-level page table and 47 bits?
> >
I don't have much comments for this patch, it looks good so far.
However I'd like to have the patch tested. I'm wondering if there are
linux distros which have enabled 16K page, or can I just compile the
kernel source with 16K page config enabled on any distro like fedora?
I guess there might be problems for makedumpfile when creating vmcore
of 16K page. Any suggestions?
I tried to build the latest kernel 6.11.0 with the 16k page and 47 va bits
option, but it failed to boot.
Could you please share the test steps? Kuan-Ying
Thanks
Lianbo
Thanks,
Tao Liu
Attachments:
- attachment.html (text/html — 2.4 KB)
Sunday, 4 August
Sun, 4 Aug
12:46 a.m.
New subject: [PATCH] arm64: Introduction of support for 16K page with 3-level table support
Hi Lijiang and Tao,
Thanks for taking look at this patch.
I use kernel-6.10 to build arm64 kernel.
I modify arch/arm64/configs/defconfig with the following diff.
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 2c7bf4da0b80..f981095a4440 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -1682,12 +1682,10 @@ CONFIG_CMA_SIZE_MBYTES=32
CONFIG_PRINTK_TIME=y
CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
-CONFIG_DEBUG_INFO_REDUCED=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_FS=y
# CONFIG_SCHED_DEBUG is not set
# CONFIG_DEBUG_PREEMPT is not set
-# CONFIG_FTRACE is not set
CONFIG_CORESIGHT=m
CONFIG_CORESIGHT_LINK_AND_SINK_TMC=m
CONFIG_CORESIGHT_CATU=m
@@ -1697,3 +1695,7 @@ CONFIG_CORESIGHT_STM=m
CONFIG_CORESIGHT_CPU_DEBUG=m
CONFIG_CORESIGHT_CTI=m
CONFIG_MEMTEST=y
+CONFIG_GDB_SCRIPTS=y
+CONFIG_STACKTRACE=y
+CONFIG_ARM64_VA_BITS_47=y
+CONFIG_ARM64_16K_PAGES=y
I can boot up with qemu-system-aarch64 and after booting up, I run the "echo c >
/proc/sysrq-trigger" in qemu to produce the
vmcore.
After I get vmcore, I can use crash-tool to debug vmcore and vmlinux.
Thank you,
Kuan-Ying Lee
114
days inactive
116
days old
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