Date: Thu, 16 Sep 2010 17:32:37 +0000 (UTC) From: Pyun YongHyeon <yongari@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r212755 - head/sys/dev/bge Message-ID: <201009161732.o8GHWbAL001494@svn.freebsd.org>
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Author: yongari Date: Thu Sep 16 17:32:37 2010 New Revision: 212755 URL: http://svn.freebsd.org/changeset/base/212755 Log: Fix incorrect RX BD producer updates. The producer index was already updated after allocating mbuf so driver had to use the last index instead of using next producer index. This should fix driver hang which may happen under high network load. Reported by: Igor Sysoev <is <> rambler-co dot ru>, Vlad Galu <dudu <> dudu dot ro> Tested by: Igor Sysoev <is <> rambler-co dot ru>, Vlad Galu <dudu <> dudu dot ro> MFC after: 10 days Modified: head/sys/dev/bge/if_bge.c Modified: head/sys/dev/bge/if_bge.c ============================================================================== --- head/sys/dev/bge/if_bge.c Thu Sep 16 17:24:25 2010 (r212754) +++ head/sys/dev/bge/if_bge.c Thu Sep 16 17:32:37 2010 (r212755) @@ -3386,9 +3386,11 @@ bge_rxeof(struct bge_softc *sc, uint16_t sc->bge_rx_saved_considx = rx_cons; bge_writembx(sc, BGE_MBX_RX_CONS0_LO, sc->bge_rx_saved_considx); if (stdcnt) - bge_writembx(sc, BGE_MBX_RX_STD_PROD_LO, sc->bge_std); + bge_writembx(sc, BGE_MBX_RX_STD_PROD_LO, (sc->bge_std + + BGE_STD_RX_RING_CNT - 1) % BGE_STD_RX_RING_CNT); if (jumbocnt) - bge_writembx(sc, BGE_MBX_RX_JUMBO_PROD_LO, sc->bge_jumbo); + bge_writembx(sc, BGE_MBX_RX_JUMBO_PROD_LO, (sc->bge_jumbo + + BGE_JUMBO_RX_RING_CNT - 1) % BGE_JUMBO_RX_RING_CNT); #ifdef notyet /* * This register wraps very quickly under heavy packet drops.
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