CVS commit: src/sys/dev/ic

[ITOH Yasufumi <itohy%netbsd.org@localhost>]

Module Name:    src
Committed By:   itohy
Date:           Sun Nov  5 07:59:21 UTC 2006

Modified Files:
        src/sys/dev/ic: elinkxl.c

Log Message:
Restart transmitter, not reset the entire chip, on transmission errors
like Tx underrun.
This should improve performance on such errors.

Handle fifo threshold properly --- actually it did not handled at all.
Note that the Tx Complete interrupts occur only on errors, and ex_txstat()
is not good place to increment sc->tx_succ_ok.  Increase the sc->tx_succ_ok
count from 100 to 256, since the ex(4) does busmastering and underruns
should rarely happen in normal operations.

Possibly improve some situation for the hang-on-heavy-load problems,
such as kern/11450 and kern/27096.


To generate a diff of this commit:
cvs rdiff -r1.91 -r1.92 src/sys/dev/ic/elinkxl.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.