On Tue, 23 Feb 2010, Martin K. Petersen wrote: > Alan> Are drivers supposed to assign values directly to > Alan> q-> limits.max_sectors? Shouldn't there be a cleaner API for all > Alan> this? > > Drivers are supposed to set the hard limit. The soft limit is a > fs/block layer value and none of the device driver's business. _How_ are drivers supposed to set the hard limit? If they call blk_queue_max_sectors() then both the hard and soft limits are affected, but at least the hard limit is set correctly. If they call blk_queue_max_hw_sectors() then only the hard limit is affected, but it cannot be set to a value less than 1024 (BLK_DEF_MAX_SECTORS). Wouldn't it be more logical to allow the hard limit to be set to anything at least as large as the page size, and decrease the soft limit if it is larger than the new hard limit? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
