#1143143 RAID10 rebuild high CPU low throughput after upgrade from Bookworm

Package:
linux
Source:
linux
Submitter:
Timothy Pearson
Date:
2026-08-04 05:19:03 UTC
Severity:
normal
Tags:
#1143143#5
Date:
2026-07-30 21:49:11 UTC
From:
To:
After upgrading from Bookworm (6.1.0-18), rebuilding a degraded RAID10 array proceeds at ~1MB/s with 100% CPU load on one core.  Booting the same system with the old 6.1 series kernel and resuming the rebuild of the same array proceeds at over 200MB/s with minimal CPU load.  This is on a LSI SAS3008 RAID controller, and the default 6.12 readahead settings were adjusted back down to the same values as the 6.1 kernel with no improvement.
#1143143#10
Date:
2026-08-04 05:17:23 UTC
From:
To:
Hi Timothy,

6.12.94-1 is not the most current kernel on trixie and there were many
bugfixes up to to 6.12.100-1. Can you still reproduce the problem
there?

Regards,
Salvatore