Messages in this thread | | | Date | Thu, 12 Apr 2001 14:52:22 -0700 (PDT) | From | Andre Hedrick <> | Subject | Re: Linux-Kernel Archive: No 100 HZ timer ! |
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Okay but what will be used for a base for hardware that has critical timing issues due to the rules of the hardware?
I do not care but your drives/floppy/tapes/cdroms/cdrws do:
/* * Timeouts for various operations: */ #define WAIT_DRQ (5*HZ/100) /* 50msec - spec allows up to 20ms */ #ifdef CONFIG_APM #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */ #else #define WAIT_READY (3*HZ/100) /* 30msec - should be instantaneous */ #endif /* CONFIG_APM */ #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */ #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */ #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */ #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
Give me something for HZ or a rule for getting a known base so I can have your storage work and not corrupt.
Andre Hedrick Linux ATA Development ASL Kernel Development ----------------------------------------------------------------------------- ASL, Inc. Toll free: 1-877-ASL-3535 1757 Houret Court Fax: 1-408-941-2071 Milpitas, CA 95035 Web: www.aslab.com
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