Messages in this thread |  | | Date | Fri, 25 May 2001 10:29:05 +0200 | From | christophe barbé <> | Subject | Re: fifo behaviour is broken in 2.4.4 |
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I'm seeing the same thing on a vanillia 2.4.4 kernel. It works on 2.2.18.
Christophe
On Thu, 24 May 2001 10:15:02 dean@dasco.ltd.uk wrote: > > [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/ > -- Christophe Barbé Software Engineer - christophe.barbe@lineo.fr Lineo France - Lineo High Availability Group 42-46, rue Médéric - 92110 Clichy - France phone (33).1.41.40.02.12 - fax (33).1.41.40.02.01 http://www.lineo.com
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