Date: Sun, 27 Oct 2002 15:00:46 -0800 (PST) From: Marcel Moolenaar <marcel@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/ia64/ia64 mp_machdep.c Message-ID: <200210272300.g9RN0ksq037709@repoman.freebsd.org>
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marcel 2002/10/27 15:00:46 PST
Modified files:
sys/ia64/ia64 mp_machdep.c
Log:
In ipi_send(), perform a mf instruction prior to initiating the IPI.
This guarantees that loads and stores emitted before the fence are
made visible before the IPI becomes pended.
Remove the mf.a instruction after initiating the IPI. There's no
guarantee that the IPI becomes pended prior to subsequent reads or
writes. Even if there was a guarantee, it would mostly be without
any benefit.
Revision Changes Path
1.41 +1 -1 src/sys/ia64/ia64/mp_machdep.c
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