Date: Wed, 22 Jan 2014 23:50:13 +0000 (UTC) From: Alexander Motin <mav@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: r261052 - stable/10/sys/rpc Message-ID: <201401222350.s0MNoDmp026297@svn.freebsd.org>
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Author: mav Date: Wed Jan 22 23:50:13 2014 New Revision: 261052 URL: http://svnweb.freebsd.org/changeset/base/261052 Log: MFC r260031: In addition to r259632 completely block receive upcalls if we have more data than we need. This reduces lock pressure from xprt_active() side. Modified: stable/10/sys/rpc/svc_vc.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/rpc/svc_vc.c ============================================================================== --- stable/10/sys/rpc/svc_vc.c Wed Jan 22 23:49:37 2014 (r261051) +++ stable/10/sys/rpc/svc_vc.c Wed Jan 22 23:50:13 2014 (r261052) @@ -619,7 +619,15 @@ svc_vc_process_pending(SVCXPRT *xprt) } } - so->so_rcv.sb_lowat = imax(1, imin(cd->resid, so->so_rcv.sb_hiwat / 2)); + /* + * Block receive upcalls if we have more data pending, + * otherwise report our need. + */ + if (cd->mpending) + so->so_rcv.sb_lowat = INT_MAX; + else + so->so_rcv.sb_lowat = + imax(1, imin(cd->resid, so->so_rcv.sb_hiwat / 2)); return (TRUE); }
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