On Fri, Sep 25, 2009 at 9:32 PM, Gary Jennejohn <gary.jennejohn_at_freenet.de> wrote: > On Fri, 25 Sep 2009 21:23:12 +0800 > Rohit Grover <rgrover1_at_gmail.com> wrote: > >> Hald spins endlessly on my CURRENT. I have the following from truss: >> >> open("/dev/usb",O_RDONLY,00) = 12 (0xc) >> ... >> ... >> poll({4/POLLIN 8/POLLIN 10/POLLIN|POLLPRI 15/POLLIN 89/POLLIN 6/POLLIN >> 9/POLLIN 88/POLLIN 7/POLLIN 12/POLLIN},10,161) = 1 (0x1) >> gettimeofday({1253883730.961100 },0x0) = 0 (0x0) >> read(12,0xbfbfe56c,384) = 0 (0x0) >> gettimeofday({1253883730.961158 },0x0) = 0 (0x0) >> poll({4/POLLIN 8/POLLIN 10/POLLIN|POLLPRI 15/POLLIN 89/POLLIN 6/POLLIN >> 9/POLLIN 88/POLLIN 7/POLLIN 12/POLLIN},10,161) = 1 (0x1) >> gettimeofday({1253883730.961228 },0x0) = 0 (0x0) >> read(12,0xbfbfe56c,384) = 0 (0x0) >> gettimeofday({1253883730.961286 },0x0) = 0 (0x0) >> poll({4/POLLIN 8/POLLIN 10/POLLIN|POLLPRI 15/POLLIN 89/POLLIN 6/POLLIN >> 9/POLLIN 88/POLLIN 7/POLLIN 12/POLLIN},10,161) = 1 (0x1) >> gettimeofday({1253883730.961357 },0x0) = 0 (0x0) >> read(12,0xbfbfe56c,384) = 0 (0x0) >> gettimeofday({1253883730.961415 },0x0) = 0 (0x0) >> ... >> ... >> >> Why is /dev/usb responding to poll() when there is no data to be read? >> >> thanks. >> > > /dev/usb is a directory on my 9-CURRENT machine, not a device file. > > Did you install hald recently, e.g. after updating you kernel? I'm pretty sure that > hald depends on kernel sources and often requires a fresh installation. I've rebuilt hald (hal-0.5.11_26) after checking out 8/stable under /usr/src/sys. Same problem. A spin loop of poll/read, with /dev/usb responding to poll() but not to read().Received on Fri Sep 25 2009 - 19:59:24 UTC
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