From mboxrd@z Thu Jan 1 00:00:00 1970 From: dyoung@redhat.com (Dave Young) Date: Fri, 9 Mar 2018 15:46:13 +0800 Subject: [PATCH v2 0/7] kexec_file, x86, powerpc: refactoring for other architecutres In-Reply-To: <20180309071813.GE25863@linaro.org> References: <20180306102303.9063-1-takahiro.akashi@linaro.org> <20180308010502.GA2600@dhcp-128-65.nay.redhat.com> <20180309060254.GA9728@dhcp-128-65.nay.redhat.com> <20180309064412.GA5327@dhcp-128-65.nay.redhat.com> <20180309071813.GE25863@linaro.org> Message-ID: <20180309074613.GA6331@dhcp-128-65.nay.redhat.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi AKASHI, On 03/09/18 at 04:18pm, AKASHI Takahiro wrote: > Dave, > > On Fri, Mar 09, 2018 at 02:44:12PM +0800, Dave Young wrote: > > On 03/09/18 at 02:02pm, Dave Young wrote: > > > On 03/08/18 at 09:05am, Dave Young wrote: > > > > [Cc Andrew] > > > > > > > > On 03/06/18 at 07:22pm, AKASHI Takahiro wrote: > > > > > This is a preparatory patch set for adding kexec_file support on arm64. > > > > > > > > > > It was originally included in a arm64 patch set[1], but Philipp is also > > > > > working on their kexec_file support on s390[2] and some changes are now > > > > > conflicting. > > > > > > > > > > So these common parts were extracted and put into a separate patch set for > > > > > better integration. What's more, my original patch#4 was split into a few > > > > > small chunks for easier review after Dave's comment. > > > > > > > > > > As such, the resulting code is basically identical with my original, and > > > > > the only *visible* differences are: > > > > > * renamings of _kexec_kernel_image_probe() and > > > > > _kimage_file_post_load_cleanup() > > > > > * change one of types of arguments at prepare_elf64_headers() > > > > > Those, unfortunately, require a couple of trivial changes on the rest > > > > > (#1, #6 to #13) of my arm64 kexec_file patch set[1]. > > > > > > > > > > Patch#1 allows making a use of purgatory optional, particularly useful > > > > > for arm64. > > > > > Patch#2 commonalizes arch_kexec_kernel_{image_probe, image_load, > > > > > verify_sig}() and arch_kimage_file_post_load_cleanup() across architectures. > > > > > Patch#3-#7 is also intended to generalize parse_elf64_headers(), along with > > > > > exclude_mem_range(), to be made best re-use of. > > > > > > > > > > [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2018-February/561182.html > > > > > [2] http://lkml.iu.edu//hypermail/linux/kernel/1802.1/02596.html > > > > > > > > > > > > > > > Changes in v2 (Mar 6, 2018) > > > > > * use IS_ENABLED() instead of #ifdef's in kexec_calculate_store_digests() > > > > > * rename _kexec_kernel_*() and make them static for now except for > > > > > kexec_image_probe_default() which is actually used by arch(powerpc) code > > > > > (Note: kexec_image_post_load_cleanup_default() will also be exported by > > > > > arm64 patches.) > > > > > * change a type of kernel_map in prepare_elf64_headers() to "int" > > > > > * check for a total number of system ram regions in full_up_crash_elf_data() > > > > > and use vzalloc() instead of vmalloc() > > > > > > > > > > AKASHI Takahiro (7): > > > > > kexec_file: make an use of purgatory optional > > > > > kexec_file,x86,powerpc: factor out kexec_file_ops functions > > > > > x86: kexec_file: purge system-ram walking from prepare_elf64_headers() > > > > > x86: kexec_file: remove X86_64 dependency from prepare_elf64_headers() > > > > > x86: kexec_file: lift CRASH_MAX_RANGES limit on crash_mem buffer > > > > > x86: kexec_file: clean up prepare_elf64_headers() > > > > > kexec_file, x86: move re-factored code to generic side > > > > > > > > > > arch/powerpc/Kconfig | 3 + > > > > > arch/powerpc/include/asm/kexec.h | 2 +- > > > > > arch/powerpc/kernel/kexec_elf_64.c | 2 +- > > > > > arch/powerpc/kernel/machine_kexec_file_64.c | 39 +--- > > > > > arch/x86/Kconfig | 3 + > > > > > arch/x86/include/asm/kexec-bzimage64.h | 2 +- > > > > > arch/x86/kernel/crash.c | 334 ++++++---------------------- > > > > > arch/x86/kernel/kexec-bzimage64.c | 2 +- > > > > > arch/x86/kernel/machine_kexec_64.c | 45 +--- > > > > > include/linux/kexec.h | 32 ++- > > > > > kernel/kexec_file.c | 240 +++++++++++++++++++- > > > > > 11 files changed, 338 insertions(+), 366 deletions(-) > > > > > > > > > > -- > > > > > 2.16.2 > > > > > > > > > > > > > AKASHI, thanks for another update, looks good to me: > > > > > > > > Acked-by: Dave Young > > > > > > Hold on the ack, during today's tests kexec kernel can not boot, it > > > hangs early. Will see if it is caused by this series and come back > > > later. > > > > AKASHI, it seems the first patch causes the hang, can you take a look? > > Sure, but can you first tell me specifics about what you have observed? It is a kexec load test like below: kexec -s -l /boot/vmlinuz-`uname -r` --reuse-cmdline sync sync kexec -e And it hangs after the message "Starting new kernel". Now I'm not sure how I tested the vmcore parsing before, maybe I forgot to add "-s" option in kexec-tools.. Thanks Dave > > Thanks, > -Takahiro AKASHI > > > > > > > > > > > > > Thanks > > > > Dave > > > > > > Thanks > > > Dave