Handle mbuf exhaustion scenario in tsec(4).
Without this fix the system would hang under heavy networking load. Submitted by: Leon Theunissen leon ! parsec dot co dot za
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=188713
@ -1332,7 +1332,12 @@ tsec_receive_intr_locked(struct tsec_softc *sc, int count)
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if (tsec_new_rxbuf(sc->tsec_rx_mtag, rx_data[i].map,
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&rx_data[i].mbuf, &rx_data[i].paddr)) {
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ifp->if_ierrors++;
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continue;
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/*
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* We ran out of mbufs; didn't consume current
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* descriptor and have to return it to the queue.
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*/
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TSEC_BACK_CUR_RX_DESC(sc);
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break;
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}
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/* Attach new buffer to descriptor and clear flags */
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