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(parent: 7057e4c) | patch
em(4): Reduce EM_TXDD_SAFE from 50 to 48.
authorSepherosa Ziehau <sephe@dragonflybsd.org>
Fri, 27 Feb 2009 13:36:39 +0000 (21:36 +0800)
committerSepherosa Ziehau <sephe@dragonflybsd.org>
Fri, 27 Feb 2009 13:49:56 +0000 (21:49 +0800)
commitaf2ee69f0f186969a052079df7b3cd462d082df2
tree67eb861fb29e50e801d874c62e7b25eca07c8688tree | snapshot
parent7057e4c2568936ddf02e1b9a9df01c701d58d958commit | diff
em(4): Reduce EM_TXDD_SAFE from 50 to 48.

With this change, the device will have at most 48 TX descriptors pending
to be write back.  48 is chosen according to the table listed on:
Intel 82571EB/82572EI Ethernet Controller Revision 6.0, Page 43,
Item 70. 82571/82572 Overwrites Transmit Descriptors in Internal Buffer.
sys/dev/netif/em/if_em.h diff | blob | blame | history
Nuno's DragonFly repo.