Bug 22029
| Summary: | use of softdependencies leads to major filesystem inconsistencies | ||
|---|---|---|---|
| Product: | Base System | Reporter: | weiss |
| Component: | kern | Assignee: | Kirk McKusick <mckusick> |
| Status: | Closed FIXED | ||
| Severity: | Affects Only Me | ||
| Priority: | Normal | ||
| Version: | 4.1.1-RELEASE | ||
| Hardware: | Any | ||
| OS: | Any | ||
Responsible Changed From-To: freebsd-bugs->mckusick Kirk would like to look at this. State Changed From-To: open->closed This problem is believed to be fixed by changes in the buffer cache code in recent months. |
After I enabled soft dependencies on a filesystem a stress test leads repeatedly to major filesystem inconsistencies, which result in kernel panics: `ffs_valloc: dup alloc' An fsck run afterwards reveals `allocated frag marked free' messages (about 20 or so). Copyright (c) 1992-2000 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 4.1.1-RELEASE #0: Tue Sep 26 00:46:59 GMT 2000 jkh@narf.osd.bsdi.com:/usr/src/sys/compile/GENERIC Timecounter "i8254" frequency 1193182 Hz CPU: Pentium III/Pentium III Xeon/Celeron (701.59-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0x683 Stepping = 3 Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,XMM> real memory = 536858624 (524276K bytes) avail memory = 518610944 (506456K bytes) Preloaded elf kernel "kernel" at 0xc0416000. Pentium Pro MTRR support enabled md0: Malloc disk npx0: <math processor> on motherboard npx0: INT 16 interface pcib0: <Intel 82443BX (440 BX) host to PCI bridge> on motherboard pci0: <PCI bus> on pcib0 pcib1: <Intel 82443BX (440 BX) PCI-PCI (AGP) bridge> at device 1.0 on pci0 pci1: <PCI bus> on pcib1 pci1: <ATI Mach64-GZ graphics accelerator> at 0.0 irq 11 isab0: <Intel 82371AB PCI to ISA bridge> at device 4.0 on pci0 isa0: <ISA bus> on isab0 atapci0: <Intel PIIX4 ATA33 controller> port 0xb800-0xb80f at device 4.1 on pci0 ata0: at 0x1f0 irq 14 on atapci0 ata1: at 0x170 irq 15 on atapci0 uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0xb400-0xb41f at device 4.2 on pci0 uhci0: Invalid irq 255 uhci0: Please switch on USB support and switch PNP-OS to 'No' in BIOS device_probe_and_attach: uhci0 attach returned 6 chip1: <Intel 82371AB Power management controller> port 0xe800-0xe80f at device 4.3 on pci0 pci0: <unknown card> (vendor=0x1385, dev=0x620a) at 9.0 irq 12 de0: <Digital 21140A Fast Ethernet> port 0xb000-0xb07f mem 0xe1000000-0xe100007f irq 10 at device 11.0 on pci0 de0: 21140A [10-100Mb/s] pass 2.2 de0: address 00:80:c8:f6:43:ea fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0 fdc0: FIFO enabled, 8 bytes threshold fd0: <1440-KB 3.5" drive> on fdc0 drive 0 atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0 atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0 kbd0 at atkbd0 vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 sc0: <System console> at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=0x300> sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0 sio0: type 16550A sio1 at port 0x2f8-0x2ff irq 3 on isa0 sio1: type 16550A ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0 ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode ppc0: FIFO with 16/16/9 bytes threshold plip0: <PLIP network interface> on ppbus0 lpt0: <Printer> on ppbus0 lpt0: Interrupt-driven port ppi0: <Parallel I/O> on ppbus0 ad0: 29314MB <IBM-DTLA-307030> [59560/16/63] at ata0-master using UDMA33 acd0: CDROM <CD-ROM 48X/AKU> at ata1-master using PIO4 Mounting root from ufs:/dev/ad0s1a How-To-Repeat: Enable soft dependencies on a file system, disable fsck in /etc/fstab and enable the force mount option for that file system. File system is named <> in the following: mkdir <>/newsrc <>/newsrc/xxx cp -R /usr/src <>/newsrc & cp -R /usr/src <>/newsrc/xxx & sleep 20; rm -rf <>/newsrc/src wait 10 seconds and press the reset button. Doing this at most twice gives you an inconsistent file system and a kernel panic during the third run.