Date: Wed, 10 Mar 1999 10:50:36 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Thierry.Besancon@lps.ens.fr Cc: Luoqi Chen <luoqi@watermarkgroup.com>, Thierry.Besancon@tournesol.lps.ens.fr, dwhite@gdi.uoregon.edu, freebsd-smp@FreeBSD.ORG, Pierre.David@prism.uvsq.fr, alc@cs.rice.edu, jt@ratp.fr Subject: Re: lockmgr() panic Message-ID: <199903101850.KAA56970@apollo.backplane.com> References: <199903101435.JAA11204@lor.watermarkgroup.com> <wnn3e3dqu7v.fsf@excalibur.lps.ens.fr>
next in thread | previous in thread | raw e-mail | index | archive | help
:>> This is a completely different problem.
:
:Life sucks today.
:
:Reading src/sys/kern/kern_lock.c, I saw this piece of code that might
:be relevant with this problem :
:
:#if !defined(MAX_PERF)
: if ((extflags & LK_CANRECURSE) == 0)
: panic("lockmgr: locking against myself");
:#endif
:
:Before defining the flag, does anybody know what MAX_PERF implies
:other than not panicing the kernel ? What does it means ?
MAX_PERF means 'maximum performance'. Note that the conditional
is an '#if !defined ...' conditional, not an '#if defined ...'
conditional.
This means that by default, when MAX_PERF is *not* defined, the above
code *will* be executed.
If MAX_PERF is defined, the system removes many sanity checks from the
kernel that would otherwise be compiled in. I would recommend that you
*NOT* define it.
-Matt
: Thierry
:
Matthew Dillon
<dillon@backplane.com>
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-smp" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199903101850.KAA56970>