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Differential D12538

if_awg: avoid hole in the rx ring buffer when mbuf allocation fails
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Authored by guyyur_gmail.com on Sep 28 2017, 6:41 PM.
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andrew
imp

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manu
jmcneill
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rS325984: if_awg: avoid hole in the rx ring buffer when mbuf allocation fails
Summary

Use a spare dma map when attempting to map a new mbuf on the rx path.
If the mbuf allocation fails or the dma map loading for the new mbuf fails just reuse the old mbuf
and increase the drop counter.

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rS FreeBSD src repository - subversion
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Event Timeline

guyyur_gmail.com created this revision.Sep 28 2017, 6:41 PM
guyyur_gmail.com updated this revision to Diff 35045.Nov 10 2017, 5:10 PM
guyyur_gmail.com retitled this revision from if_awg rx path changes to avoid hole in the ring buffer to if_awg: avoid hole in the rx ring buffer when mbuf allocation fails.
guyyur_gmail.com added a reviewer: jmcneill.
guyyur_gmail.com set the repository for this revision to rS FreeBSD src repository - subversion.
Herald added subscribers: andrew, imp. · View Herald TranscriptNov 10 2017, 5:11 PM
guyyur_gmail.com added a child revision: D12539: if_awg: drain tx buffers and clear rx buffers when stopping.Nov 10 2017, 5:13 PM
manu accepted this revision.Nov 18 2017, 9:07 PM
This revision is now accepted and ready to land.Nov 18 2017, 9:07 PM
Closed by commit rS325984: if_awg: avoid hole in the rx ring buffer when mbuf allocation fails (authored by manu). · Explain WhyNov 18 2017, 9:08 PM
This revision was automatically updated to reflect the committed changes.

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head/
sys/
arm/
allwinner/
159 lines

Diff 35435

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head/sys/arm/allwinner/if_awg.c

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