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a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=jiCTI4zE5U7BLdzWsZGv:22 a=EIcjfB9IiI4px24ztqRk:22 a=i6RuuZHAm7oPeoWAvO4A:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzE3MDEzNiBTYWx0ZWRfXyi63lWlYaaoY 351syeJjYMPbC7A5y96RDK4Tw9vqDrNjKnDSk4s/kAcEpGB2LPYSW/rXIkMguEKTn75eNSFbX7o GSvPY1e15GaJPmW7P1fiw43+frXurH6RkLVGZpiKkDBR4vo7ZN+TXH+UhHSu+ABiJU/52ryQ4Th emMdvq2caIEH1AF3umdyh5k1oxVJ1iKv50+s6OiwRf+csL3KaWpkpwZZLICe4p++4vR6rdKQN9T 94YO7KX/rFzdM0im4MdOsjZuKqgPnkVfTnSWCd2b2xsJaU/wPV8vuE6WP9XHa1vHc+avOHXIT8A sG/Oo5TswY0uTQ1fvCgty5klaAGFfmxj6Umf2OWsWT2HodSISIz6IUdOUFcwW2mhz4wLicxpGWB 7Xp4gOUQEDNk/ZbNup43pa7FIs59tskGEGlWOyj7tYLXvnFiv7MCnxvoB6OdmQ64l89a56hrzK/ b8aS1sw/pBXKGpLyKOA== X-Proofpoint-GUID: ar8OBTo28Gm1M9ZDi9_JVmWitJc5fSPf X-Proofpoint-ORIG-GUID: ar8OBTo28Gm1M9ZDi9_JVmWitJc5fSPf On 17/03/2026 14:36, Christoph Hellwig wrote: > On Tue, Mar 17, 2026 at 09:11:59AM +0000, John Garry wrote: >> For SAS controllers, don't we limit shost->opt_sectors at >> shost->max_sectors, and then in sd_revalidate_disk() this value is ignored >> as sdkp->opt_xfer_blocks would be smaller, right? > That assumes opt_xfer_blocks is actually set. It's an optional and > relatively recent SCSI feature. So don't expect crappy SSDs or > RAID controllers faking up SCSI in shitty firmware to actually set > it. Sure, and then we would have io_opt at max_sectors, and it seems that value is totally configurable for that HBA driver. However I still find the values reported strange: swidth=4095 / sunit=2 I thought that they were from io_opt and io_min, and blk_validate_limits() does rounding to PBS, except io_min has no rounding for > PBS.