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[RLC 8] LE-4535 #808

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@shreeya-patel98 shreeya-patel98 commented Jan 12, 2026 •
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jira LE-4535
commit-author Long Li <longli@microsoft.com>
commit b69ffeaa0ae43892683113b3f4ddf156398738b9

Kernel Build

/mnt/scratch/workspace/sig-cloud-8/kernel-src-tree
Skipping make mrproper
[TIMER]{MRPROPER}: 0s
x86_64 architecture detected, copying config
'configs/kernel-x86_64.config' -> '.config'
Setting Local Version for build
CONFIG_LOCALVERSION="-shreeya_rlc-8_4.18.0-553.89.1.el8_10-a8c2304ea48d"
Making olddefconfig
scripts/kconfig/conf  --olddefconfig Kconfig
#
# configuration written to .config
#
Starting Build
scripts/kconfig/conf  --syncconfig Kconfig
  UPD     include/generated/uapi/linux/version.h
  DESCEND objtool
  DESCEND bpf/resolve_btfids
  UPD     include/config/kernel.release
  UPD     include/generated/utsrelease.h
  HOSTCC  scripts/bin2c
  CC      kernel/bounds.s
  CC      arch/x86/kernel/asm-offsets.s
  HOSTCC  scripts/mod/modpost.o
  HOSTCC  scripts/mod/sumversion.o
  HOSTCC  scripts/mod/file2alias.o
  HOSTLD  scripts/mod/modpost
  CALL    scripts/checksyscalls.sh
  CC      arch/x86/coco/core.o
  CC      arch/x86/ia32/sys_ia32.o
  CC      arch/x86/net/bpf_jit_comp.o
  CC      arch/x86/events/core.o
  <--snip-->
    INSTALL sound/virtio/virtio_snd.ko
  INSTALL sound/usb/usx2y/snd-usb-usx2y.ko
  INSTALL sound/x86/snd-hdmi-lpe-audio.ko
  INSTALL sound/xen/snd_xen_front.ko
  INSTALL virt/lib/irqbypass.ko
  DEPMOD  4.18.0-shreeya_rlc-8_4.18.0-553.89.1.el8_10-a8c2304ea48d+
[TIMER]{MODULES}: 10s
Making Install
sh ./arch/x86/boot/install.sh 4.18.0-shreeya_rlc-8_4.18.0-553.89.1.el8_10-a8c2304ea48d+ arch/x86/boot/bzImage \
	System.map "/boot"
[TIMER]{INSTALL}: 18s
Checking kABI
kABI check passed
Setting Default Kernel to /boot/vmlinuz-4.18.0-shreeya_rlc-8_4.18.0-553.89.1.el8_10-a8c2304ea48d+ and Index to 6
The default is /boot/loader/entries/753870ec7b134d7582d817dd9bf35992-4.18.0-shreeya_rlc-8_4.18.0-553.89.1.el8_10-a8c2304ea48d+.conf with index 6 and kernel /boot/vmlinuz-4.18.0-shreeya_rlc-8_4.18.0-553.89.1.el8_10-a8c2304ea48d+
The default is /boot/loader/entries/753870ec7b134d7582d817dd9bf35992-4.18.0-shreeya_rlc-8_4.18.0-553.89.1.el8_10-a8c2304ea48d+.conf with index 6 and kernel /boot/vmlinuz-4.18.0-shreeya_rlc-8_4.18.0-553.89.1.el8_10-a8c2304ea48d+
Generating grub configuration file ...
done
Hopefully Grub2.0 took everything ... rebooting after time metrices
[TIMER]{MRPROPER}: 0s
[TIMER]{BUILD}: 2214s
[TIMER]{MODULES}: 10s
[TIMER]{INSTALL}: 18s
[TIMER]{TOTAL} 2247s
Rebooting in 10 seconds

kernel-build.log

Kselftest

shreeya@spatel-dev-bom ~/c/w/sig-cloud-8> grep -a ^ok kselftest-before.log | wc -l
217
shreeya@spatel-dev-bom ~/c/w/sig-cloud-8> grep -a ^ok kselftest-after.log | wc -l
217

kselftest-after.log
kselftest-before.log

@shreeya-patel98
scsi: storvsc: Prefer returning channel with the same CPU as on the I…
a8c2304 
…/O issuing CPU

jira LE-4535
commit-author Long Li <longli@microsoft.com>
commit b69ffea

When selecting an outgoing channel for I/O, storvsc tries to select a
channel with a returning CPU that is not the same as issuing CPU. This
worked well in the past, however it doesn't work well when the Hyper-V
exposes a large number of channels (up to the number of all CPUs). Use a
different CPU for returning channel is not efficient on Hyper-V.

Change this behavior by preferring to the channel with the same CPU as
the current I/O issuing CPU whenever possible.

Tests have shown improvements in newer Hyper-V/Azure environment, and no
regression with older Hyper-V/Azure environments.

	Tested-by: Raheel Abdul Faizy <rabdulfaizy@microsoft.com>
	Signed-off-by: Long Li <longli@microsoft.com>
Message-Id: <1759381530-7414-1-git-send-email-longli@linux.microsoft.com>
	Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit b69ffea)
	Signed-off-by: Shreeya Patel <spatel@ciq.com>
@shreeya-patel98 shreeya-patel98 requested a review from a team January 12, 2026 13:51
@shreeya-patel98 shreeya-patel98 self-assigned this Jan 12, 2026
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github-actions bot commented Jan 12, 2026

🤖 Validation Checks In Progress Workflow run: https://github.com/ctrliq/kernel-src-tree/actions/runs/20922078835

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github-actions bot commented Jan 12, 2026

✅ Validation checks completed successfully View full results: https://github.com/ctrliq/kernel-src-tree/actions/runs/20922078835

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