Date: Sun, 13 Jun 2004 06:53:30 +0200 From: Max Laier <max@love2party.net> To: current@freebsd.org Cc: net@freebsd.org Subject: HEADSUP: About to link ALTQ to the build (ABI break) Message-ID: <200406130653.39527.max@love2party.net>
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--Boundary-02=_T39yA0DijV64XFm Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline All, as some might know, I recently imported the ALTQ framework with the=20 perspective to replace the existing queueing with this advanced system. Whi= le=20 ALTQ is designed in a fashion to be API compatible with the old "struct=20 ifqueue" it does break the ABI by chaning the size of ifnet.if_snd! I am now ready to commit this change. During the first commit I will not=20 change the queueing at all. It will only change the if_snd member of struct= =20 ifnet and bring in new macros and some build glue. In a next step I will convert the various if_output routines (in if_*subr.c= )=20 to use the new ENQUEUE/HANDOFF operations. The final step then is to convert the network drivers to use the new DEQUEU= E=20 operations and to flip the per-driver flag that indicates that the driver i= s=20 ready for ATLQ. The new DEQUEUE operation also bring along some extra candy in terms of=20 reducing locking overhead: It will now be possible to do "bulk dequeues" i.= e.=20 transfering more than one packet from the system to the driver with only on= e=20 lock operation. The amount of packets transfered at once is tuneable.=20 Enabling ALTQ on a device will disable bulk dequeue to avoid irritations wi= th=20 the timing, though. The patch is at: http://people.freebsd.org/~mlaier/altq.patch I plan to commit this Sunday night(CEST) provided that no problems occure w= ith=20 the newly merged socket locking et al. =2D-=20 Best regards, | mlaier@freebsd.org Max Laier | ICQ #67774661 http://pf4freebsd.love2party.net/ | mlaier@EFnet --Boundary-02=_T39yA0DijV64XFm Content-Type: application/pgp-signature Content-Description: signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQBAy93TXyyEoT62BG0RAmc1AJ4uAFXap5L+YQRT837vwz09jwyL5wCdEs/I QIpAkX/2yjEiexOQELuVHSE= =C+rD -----END PGP SIGNATURE----- --Boundary-02=_T39yA0DijV64XFm--
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