Hi, On 9/3/21 2:35 PM, Jens Axboe wrote: > On 9/3/21 3:44 AM, Kate Hsuan wrote: >> Many users are reporting that the Samsung 860 and 870 SSD are having >> various issues when combined with AMD/ATI (vendor ID 0x1002) SATA >> controllers and only completely disabling NCQ helps to avoid these >> issues. >> >> Always disabling NCQ for Samsung 860/870 SSDs regardless of the host >> SATA adapter vendor will cause I/O performance degradation with well >> behaved adapters. To limit the performance impact to ATI adapters, >> introduce the ATA_HORKAGE_NO_NCQ_ON_ATI flag to force disable NCQ >> only for these adapters. >> >> Also, two libata.force parameters (noncqati and ncqati) are introduced >> to disable and enable the NCQ for the system which equipped with ATI >> SATA adapter and Samsung 860 and 870 SSDs. The user can determine NCQ >> function to be enabled or disabled according to the demand. >> >> After verifying the chipset from the user reports, the issue appears >> on AMD/ATI SB7x0/SB8x0/SB9x0 SATA Controllers and does not appear on >> recent AMD SATA adapters. The vendor ID of ATI should be 0x1002. >> Therefore, ATA_HORKAGE_NO_NCQ_ON_AMD was modified to >> ATA_HORKAGE_NO_NCQ_ON_ATI. > > What's this patch against? linux-block/for-next + my pre-cursor patch from here: https://lore.kernel.org/linux-ide/20210823095220.30157-1-hdegoede@xxxxxxxxxx/T/#u Regards, Hans
