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nvme-pci: clamp max_hw_sectors based on DMA optimized limitation

Ewan D. Milne requested to merge e-milne/centos-stream-9:bz2149974 into main

Merge Request Required Information

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2168169 Upstream Status: From upstream linux mainline Signed-off-by: Ewan D. Milne emilne@redhat.com

Summary of Changes

Change to use DMA optimal size limit instead of maximum when setting max_sectors_kb, avoids using large transfer sizes which cause problems with machines such as AMD servers w/IOMMU

Approved Development Ticket

All submissions to CentOS Stream must reference an approved ticket in Red Hat Jira. Please follow the CentOS Stream contribution documentation for how to file this ticket and have it approved.

Edited by Ewan D. Milne

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