Date: Sun, 24 Mar 2013 11:33:56 -0700 (PDT) From: MagnusNilsson <magnus.nilsson@gmail.com> To: freebsd-arm@freebsd.org Subject: Re: Preemption on MV78100 (ARMv5TE)? Message-ID: <1364150036396-5798701.post@n5.nabble.com> In-Reply-To: <1364063575.1157.155.camel@revolution.hippie.lan> References: <1364062508310-5798411.post@n5.nabble.com> <1364063575.1157.155.camel@revolution.hippie.lan>
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> Can you provide any information about the crashes? Sorry, "crash" is misleading. Rather, it hangs, almost always during boot. The latest hangs I saw where at "Entropy harvesting:[hang]" and "Trying to mount root from ufs:/dev/ad0s1[hang]" I have tried both SCHED_4BSD and SCHED_ULE, but I don't see any difference. > something to try that may give you most of the same benefits would be to > compile with HZ=1000 Thanks, HZ=2000 already. I mainly want to ensure that the crash isn't caused by some other instability that is tickled by preemption. Basically I want it working - or I want to know why it doesn't. These two patches are applied, but with no improvement: http://www.freebsd.org/cgi/query-pr.cgi?pr=arm/160431 http://www.freebsd.org/cgi/query-pr.cgi?pr=arm/161498 I'll see if I can backport later fixes to 8.2 and see if that helps. My conf (without "options PREEMPTION") is as follows: ident DEV include "../mv/discovery/std.db78xxx" options SOC_MV_DISCOVERY makeoptions MODULES_OVERRIDE="" makeoptions WERROR="-Werror" options SCHED_ULE #4BSD scheduler options INET #InterNETworking options INET6 #IPv6 communications protocols options FFS #Berkeley Fast Filesystem options NFSCLIENT #Network Filesystem Client options NFSLOCKD #Network Lock Manager options NFS_ROOT #NFS usable as /, requires NFSCLIENT options GEOM_PART_BSD options SYSVSHM #SYSV-style shared memory options SYSVMSG #SYSV-style message queues options SYSVSEM #SYSV-style semaphores options _KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions options MUTEX_NOINLINE options RWLOCK_NOINLINE options NO_FFS_SNAPSHOT options NO_SWAPPING options ROOTDEVNAME=\"ufs:/dev/ad0s1\" options HZ=2000 device pci device loop device md device pty device random device uart device ether device mge # Marvell Gigabit Ethernet controller device mii device e1000phy device bpf options USB_DEBUG # enable debug msgs device usb device ehci device umass device scbus device pass device da device iic device iicbus device ds133x device ata device atadisk -- View this message in context: http://freebsd.1045724.n5.nabble.com/Preemption-on-MV78100-ARMv5TE-tp5798411p5798701.html Sent from the freebsd-arm mailing list archive at Nabble.com.
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