Date: Wed, 27 May 2009 18:12:27 +0000 (UTC) From: Rink Springer <rink@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/ia64/ia64 mp_machdep.c Message-ID: <200905271816.n4RIG18X064391@repoman.freebsd.org>
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rink 2009-05-27 18:12:27 UTC
FreeBSD src repository
Modified files:
sys/ia64/ia64 mp_machdep.c
Log:
SVN rev 192918 on 2009-05-27 18:12:27Z by rink
ia64: Move MCA information retrieval to a per-CPU kthread
Once AP's are launched, their MCA state information is stored and later obtainable using a sysctl. Since the size of the MCA state information is unknown, it will be malloc'ed as needed. However, when 'ia64_ap_startup' runs, it's not yet safe to call malloc and this may cause 'panic: blockable sleep lock (sleep mutex) 8192 @ /usr/src/sys/vm/uma_core.c'. This commit avoids this issue by scheduling a separate kthread to obtain this information, which immediately terminates afterwards.
Revision Changes Path
1.73 +26 -8 src/sys/ia64/ia64/mp_machdep.c
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