Date: Thu, 14 Jan 2016 14:17:05 +0000 (UTC) From: Andrew Rybchenko <arybchik@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r293928 - stable/10/sys/dev/sfxge Message-ID: <201601141417.u0EEH5il019774@repo.freebsd.org>
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Author: arybchik Date: Thu Jan 14 14:17:05 2016 New Revision: 293928 URL: https://svnweb.freebsd.org/changeset/base/293928 Log: MFC r291488 sfxge: avoid TSO packets collapses bacause of not 2K aligned data Sponsored by: Solarflare Communications, Inc. Modified: stable/10/sys/dev/sfxge/sfxge_tx.h Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/sfxge/sfxge_tx.h ============================================================================== --- stable/10/sys/dev/sfxge/sfxge_tx.h Thu Jan 14 14:16:26 2016 (r293927) +++ stable/10/sys/dev/sfxge/sfxge_tx.h Thu Jan 14 14:17:05 2016 (r293928) @@ -51,11 +51,13 @@ /* Maximum number of DMA segments needed to map an mbuf chain. With * TSO, the mbuf length may be just over 64K, divided into 2K mbuf - * clusters. (The chain could be longer than this initially, but can - * be shortened with m_collapse().) + * clusters taking into account that the first may be not 2K cluster + * boundary aligned. + * The chain could be longer than this initially, but can be shortened + * with m_collapse(). */ #define SFXGE_TX_MAPPING_MAX_SEG \ - (1 + howmany(SFXGE_TSO_MAX_SIZE, MCLBYTES)) + (1 + howmany(SFXGE_TSO_MAX_SIZE, MCLBYTES) + 1) /* * Buffer mapping flags.
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