search for: witness_skipspin

Hi, my FreeBSD-9/stable machine (FreeBSD freebsd-tower.goebo.site 9.1-PRERELEASE FreeBSD 9.1-PRERELEASE #2 r241044M: Sat Sep 29 12:52:01 CEST 2012 lbo@freebsd-tower.goebo.site:/usr/obj/usr/src/sys/GENERIC i386) crashes reproducibly when rsync-ing files to an NFSv4 share on the FreeBSD machine. The crash makes the system reboot. The crash creates files in /var/crash which may be obtained

Hi. I''m all set for doing performance comparsion between Solaris/ZFS and FreeBSD/ZFS. I spend last few weeks on FreeBSD/ZFS optimizations and I think I''m ready. The machine is 1xQuad-core DELL PowerEdge 1950, 2GB RAM, 15 x 74GB-FC-10K accesses via 2x2Gbit FC links. Unfortunately the links to disks are the bottleneck, so I''m going to use not more than 4 disks, probably.

I've got a HP dv8000 laptop. Setting up the wpi driver for wireless freezes the system on boot with the following error: wpi0 requested unsupported memory range wpi0: could not allocate memory resource It lists a pcbi device (pcbi4 i think) and an actual memory range, but since I have to reboot using kernel.old the /var/run/dmesg.boot is wiped with the info. Is there anyway to grab the

...little experience with kernel debugging, but the box in question is out of our farm and available for testing, and I am motivated to cooperate. :-) The full debugging kernel options I used are: include SMP options KDB options KDB_TRACE options DDB options BREAK_TO_DEBUGGER options WITNESS options WITNESS_SKIPSPIN db> trace Tracing pid 71182 tid 100325 td 0xcc08b180 kdb_enter(c095f294) at kdb_enter+0x2b panic(c09768ad,1000,14000000,c145bc88,1000,...) at panic+0x127 kmem_malloc(c14680c0,1000,102,eba6a8cc,c07e3fa5,...) at kmem_malloc+0x89 page_alloc(c1453780,1000,eba6a8bf,102,c06b8a84,...) at page_alloc+0...

...upport DDB. options GDB # Support remote GDB. options STACK #options INVARIANTS # Enable calls of extra sanity checking #options INVARIANT_SUPPORT # Extra sanity checks of internal structures, required by INVARIANTS #options WITNESS # Enable checks to detect deadlocks and cycles #options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed # Make an SMP-capable kernel by default options SMP # Symmetric MultiProcessor Kernel # Bus support. device acpi device pci # Floppy drives device fdc # ATA and ATAPI devices device ata device atadisk # ATA disk drives device ataraid # A...

I was trying to simply test bandwidth that Solaris/ZFS (Nevada b63) can deliver from a drive, and doing this: dd if=(raw disk) of=/dev/null gives me around 80MB/s, while dd if=(file on ZFS) of=/dev/null gives me only 35MB/s!?. I am getting basically the same result whether it is single zfs drive, mirror or a stripe (I am testing with two Seagate 7200.10 320G drives hanging off the same interface