Author: arybchik Date: Mon Nov 30 13:27:40 2015 New Revision: 291488 URL: https://svnweb.freebsd.org/changeset/base/291488
Log: sfxge: avoid TSO packets collapses bacause of not 2K aligned data Sponsored by: Solarflare Communications, Inc. MFC after: 2 days Differential Revision: https://reviews.freebsd.org/D4310 Modified: head/sys/dev/sfxge/sfxge_tx.h Modified: head/sys/dev/sfxge/sfxge_tx.h ============================================================================== --- head/sys/dev/sfxge/sfxge_tx.h Mon Nov 30 13:20:49 2015 (r291487) +++ head/sys/dev/sfxge/sfxge_tx.h Mon Nov 30 13:27:40 2015 (r291488) @@ -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. _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
