Messages in this thread |  | | From | dean@dasco ... | Subject | fifo behaviour is broken in 2.4.4 | Date | Thu, 24 May 2001 08:15:02 (GMT) |
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[1.] fifo behaviour is broken in 2.4.4
[2.] fifo are being flushed. Sending characters to a fifo, select(2) returns 'ready to read' on the fifo, but attempting to determine the number of characters in fifo returns zero.
[3.] mkfifo select flush kernel fs
[4.] Linux version 2.4.4 (root@devl) (gcc version 2.95.2 19991024 (release)) #1 Sat Apr 28 21:15:56 BST 2001
[5.] Not Ooops.
[6.]
In first session:
mkfifo /tmp/myfifo while (sleep 2) do echo fred > /tmp/myfifo done
In second session:
tail -f /tmp/myfifo
Expect 2nd session to display 'fred' every 2 seconds. Results I am getting, in 2.4.4, just one 'fred'.
[ Test of expectations: Linux 2.4.3 as expected (albeit with 'file trucation' warnings) Solaris 2.6: as expected ]
[7.] Any shell
[7.1] ver_linux
Linux devl 2.4.4 #1 Sat Apr 28 21:15:56 BST 2001 i686 unknown Gnu C 2.95.2 Gnu make 3.79.1 binutils 2.9.5.0.24 util-linux 2.10q mount 2.10q modutils 2.4.1 e2fsprogs 1.19 pcmcia-cs 3.1.17 PPP 2.3.11 isdn4k-utils 3.1pre1a Linux C Library x 1 root root 1382179 Jan 19 06:14 /lib/libc.so.6 Dynamic linker (ldd) 2.2 Procps 2.0.6 Net-tools 1.57 Kbd 0.99 Sh-utils 2.0 Modules Loaded
[7.2] /proc/cpuinfo
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 6 model name : Celeron (Mendocino) stepping : 10 cpu MHz : 466.678 cache size : 128 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr bogomips : 930.61
[7.3] /proc/modules
[7.4] /proc/ioports, /proc/iomem
0000-001f : dma1 0020-003f : pic1 0040-005f : timer 0060-006f : keyboard 0080-008f : dma page reg 00a0-00bf : pic2 00c0-00df : dma2 00f0-00ff : fpu 0170-0177 : ide1 01f0-01f7 : ide0 0376-0376 : ide1 03c0-03df : vga+ 03f6-03f6 : ide0 03f8-03ff : serial(auto) 0cf8-0cff : PCI conf1 1000-103f : Intel Corporation 82371AB PIIX4 ACPI 1040-105f : Intel Corporation 82371AB PIIX4 ACPI 1060-107f : Intel Corporation 82371AB PIIX4 USB 1080-108f : Intel Corporation 82371AB PIIX4 IDE 1080-1087 : ide0 1088-108f : ide1 1400-14ff : ESS Technology ES1978 Maestro 2E 1400-14ff : ESS Maestro 2E 1800-18ff : PCI CardBus #02 1800-187f : PCI device 115d:0003 1800-187f : xircom_tulip_cb 1880-1887 : PCI device 115d:0103 1c00-1cff : PCI CardBus #02 2000-2fff : PCI Bus #01 2000-20ff : ATI Technologies Inc 3D Rage P/M Mobility AGP 2x 3000-30ff : PCI CardBus #06 3400-34ff : PCI CardBus #06
00000000-0009f7ff : System RAM 0009f800-0009ffff : reserved 000a0000-000bffff : Video RAM area 000c0000-000c7fff : Video ROM 000f0000-000fffff : System ROM 00100000-13feffff : System RAM 00100000-002090ad : Kernel code 002090ae-0026a98b : Kernel data 13ff0000-13fffbff : ACPI Tables 13fffc00-13ffffff : ACPI Non-volatile Storage 14000000-14000fff : Texas Instruments PCI1225 14001000-14001fff : Texas Instruments PCI1225 (#2) 14400000-147fffff : PCI CardBus #02 14400000-14403fff : PCI device 115d:0003 14404000-14407fff : PCI device 115d:0103 14800000-14bfffff : PCI CardBus #02 14800000-148007ff : PCI device 115d:0003 14800800-14800fff : PCI device 115d:0003 14801000-148017ff : PCI device 115d:0103 14801800-14801fff : PCI device 115d:0103 14c00000-14ffffff : PCI CardBus #06 15000000-153fffff : PCI CardBus #06 e0000000-e3ffffff : Intel Corporation 440BX/ZX - 82443BX/ZX Host bridge fc000000-fdffffff : PCI Bus #01 fc000000-fc000fff : ATI Technologies Inc 3D Rage P/M Mobility AGP 2x fd000000-fdffffff : ATI Technologies Inc 3D Rage P/M Mobility AGP 2x fff80000-ffffffff : reserved
[7.5] lspci -vvv
00:00.0 Host bridge: Intel Corporation 440BX/ZX - 82443BX/ZX Host bridge (rev 03) Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR+ Latency: 64 Region 0: Memory at e0000000 (32-bit, prefetchable) [size=64M] Capabilities: [a0] AGP version 1.0 Status: RQ=31 SBA+ 64bit- FW- Rate=x2 Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>
00:01.0 PCI bridge: Intel Corporation 440BX/ZX - 82443BX/ZX AGP bridge (rev 03) (prog-if 00 [Normal decode]) Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 128 Bus: primary=00, secondary=01, subordinate=01, sec-latency=64 I/O behind bridge: 00002000-00002fff Memory behind bridge: fc000000-fdffffff Prefetchable memory behind bridge: fff00000-000fffff BridgeCtl: Parity- SERR- NoISA+ VGA+ MAbort- >Reset- FastB2B+
00:04.0 CardBus bridge: Texas Instruments PCI1225 (rev 01) Subsystem: Dell Computer Corporation: Unknown device 009e Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 168, cache line size 08 Interrupt: pin A routed to IRQ 11 Region 0: Memory at 14000000 (32-bit, non-prefetchable) [size=4K] Bus: primary=00, secondary=02, subordinate=02, sec-latency=176 Memory window 0: 14400000-147ff000 (prefetchable) Memory window 1: 14800000-14bff000 I/O window 0: 00001800-000018ff I/O window 1: 00001c00-00001cff BridgeCtl: Parity- SERR- ISA- VGA- MAbort- >Reset- 16bInt- PostWrite+ 16-bit legacy interface ports at 0001
00:04.1 CardBus bridge: Texas Instruments PCI1225 (rev 01) Subsystem: Dell Computer Corporation: Unknown device 009e Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 168, cache line size 08 Interrupt: pin A routed to IRQ 11 Region 0: Memory at 14001000 (32-bit, non-prefetchable) [size=4K] Bus: primary=00, secondary=06, subordinate=06, sec-latency=176 Memory window 0: 14c00000-14fff000 (prefetchable) Memory window 1: 15000000-153ff000 I/O window 0: 00003000-000030ff I/O window 1: 00003400-000034ff BridgeCtl: Parity- SERR- ISA- VGA- MAbort- >Reset+ 16bInt+ PostWrite+ 16-bit legacy interface ports at 0001
00:07.0 Bridge: Intel Corporation 82371AB PIIX4 ISA (rev 02) Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0
00:07.1 IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 01) (prog-if 80 [Master]) Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 64 Region 4: I/O ports at 1080 [size=16]
00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01) (prog-if 00 [UHCI]) Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Interrupt: pin D routed to IRQ 5 Region 4: I/O ports at 1060 [size=32]
00:07.3 Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 03) Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Interrupt: pin ? routed to IRQ 9
00:08.0 Multimedia audio controller: ESS Technology ES1978 Maestro 2E (rev 10) Subsystem: Dell Computer Corporation: Unknown device 009e Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 64 (500ns min, 6000ns max) Interrupt: pin A routed to IRQ 5 Region 0: I/O ports at 1400 [size=256] Capabilities: [c0] Power Management version 2 Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA PME(D0-,D1+,D2+,D3hot+,D3cold-) Status: D2 PME-Enable- DSel=0 DScale=0 PME-
01:00.0 VGA compatible controller: ATI Technologies Inc 3D Rage P/M Mobility AGP 2x (rev 64) (prog-if 00 [VGA]) Subsystem: Dell Computer Corporation: Unknown device 009e Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping+ SERR- FastB2B- Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 66 (2000ns min), cache line size 08 Interrupt: pin A routed to IRQ 11 Region 0: Memory at fd000000 (32-bit, non-prefetchable) [size=16M] Region 1: I/O ports at 2000 [size=256] Region 2: Memory at fc000000 (32-bit, non-prefetchable) [size=4K] Expansion ROM at <unassigned> [disabled] [size=128K] Capabilities: [50] AGP version 1.0 Status: RQ=255 SBA+ 64bit- FW- Rate=x1,x2 Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none> Capabilities: [5c] Power Management version 1 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME-
02:00.0 Ethernet controller: Xircom Cardbus Ethernet 10/100 (rev 03) Subsystem: Xircom Cardbus Ethernet 10/100 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 64 (5000ns min, 10000ns max) Interrupt: pin A routed to IRQ 11 Region 0: I/O ports at 1800 [size=128] Region 1: Memory at 14800000 (32-bit, non-prefetchable) [size=2K] Region 2: Memory at 14800800 (32-bit, non-prefetchable) [size=2K] Expansion ROM at 14400000 [size=16K] Capabilities: [dc] Power Management version 1 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=2 PME-
02:00.1 Serial controller: Xircom Cardbus Ethernet + 56k Modem (rev 03) (prog-if 02 [16550]) Subsystem: Xircom CBEM56G-100 Ethernet + 56k Modem Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Interrupt: pin A routed to IRQ 11 Region 0: I/O ports at 1880 [size=8] Region 1: Memory at 14801000 (32-bit, non-prefetchable) [size=2K] Region 2: Memory at 14801800 (32-bit, non-prefetchable) [size=2K] Expansion ROM at 14404000 [size=16K] Capabilities: [dc] Power Management version 1 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=2 PME-
[7.6] /proc/scsi/scsi NA
[7.7] -
[8.] Method in [6.] tested on 2.4.3 and Solaris 2.6 both work as expected.
Cheers, Dean.
-- Dean.A.Darlison dean@dasco.ltd.uk Dasco Ltd. http://www.dasco.ltd.uk/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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