I described it previously. Signals won't always be sent to the right process, i.e. running a process under GDB the debuggee will sometimes get the SIGTRAP instead of GDB. When restarting mysql, mysql-server becomes unkillable. Removing KSE (bike_sched et al.) makes the problem go away. It is trivial to hit on sun4v. However, I've seen it (or a problem with similar symptoms) on x86 using NetApp's development simulator which makes very heavy use of signals. I believe NetApp ended up giving up on using FreeBSD for running their simulator as this problem made FreeBSD a non-starter for them. I no longer work for NetApp so I don't have access to the sources for the simulator any more, so I don't know if bike_sched fixes that problem for them or not. -Kip On Wed, 2 Aug 2006, Daniel Eischen wrote: > On Wed, 2 Aug 2006, Kip Macy wrote: > > > sun4u is a dead architecture. Signals are broken with KSE on a > > tightly coupled SMP so sun4v doesn't even have KSE in the tree. > > On every platform or on sparc64? I am unaware of any signal > problems in i386. > > > Unless someone steps up to fix KSE "will not work" is more correct. > > Please clarify. > > -- > DE > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" >Received on Wed Aug 02 2006 - 19:33:49 UTC
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