Date: Fri, 29 Sep 2000 23:30:40 -0700 (PDT) From: Bosko Milekic <bmilekic@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/alpha/alpha machdep.c src/sys/i386/i386 machdep.c src/sys/kern uipc_mbuf.c src/sys/pc98/i386 machdep.c src/sys/sys kernel.h mbuf.h Message-ID: <200009300630.XAA35447@freefall.freebsd.org>
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bmilekic 2000/09/29 23:30:40 PDT
Modified files:
sys/alpha/alpha machdep.c
sys/i386/i386 machdep.c
sys/kern uipc_mbuf.c
sys/pc98/i386 machdep.c
sys/sys kernel.h mbuf.h
Log:
Big mbuf subsystem diff #1: incorporate mutexes and fix things up somewhat
to accomodate the changes.
Here's a list of things that have changed (I may have left out a few); for a
relatively complete list, see http://people.freebsd.org/~bmilekic/mtx_journal
* Remove old (once useful) mcluster code for MCLBYTES > PAGE_SIZE which
nobody uses anymore. It was great while it lasted, but now we're moving
onto bigger and better things (Approved by: wollman).
* Practically re-wrote the allocation macros in sys/sys/mbuf.h to accomodate
new allocations which grab the necessary lock.
* Make sure that necessary mbstat variables are manipulated with
corresponding atomic() routines.
* Changed the "wait" routines, cleaned it up, made one routine that does
the job.
* Generalized MWAKEUP() macro. Got rid of m_retry and m_retryhdr, as they
are now included in the generalized "wait" routines.
* Sleep routines now use msleep().
* Free lists have locks.
* etc... probably other stuff I'm missing...
Things to look out for and work on later:
* find a better way to (dynamically) adjust EXT_COUNTERS
* move necessity to recurse on a lock from drain routines by providing
lock-free lower-level version of MFREE() (and possibly m_free()?).
* checkout include of mutex.h in sys/sys/mbuf.h - probably violating
general philosophy here.
The code has been reviewed quite a bit, but problems may arise... please,
don't panic! Send me Emails: bmilekic@freebsd.org
Reviewed by: jlemon, cp, alfred, others?
Revision Changes Path
1.95 +3 -14 src/sys/alpha/alpha/machdep.c
1.412 +3 -14 src/sys/i386/i386/machdep.c
1.57 +211 -258 src/sys/kern/uipc_mbuf.c
1.180 +3 -14 src/sys/pc98/i386/machdep.c
1.70 +3 -3 src/sys/sys/kernel.h
1.56 +173 -152 src/sys/sys/mbuf.h
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