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    SubjectRe: usbip: somtimes stalls at kernel_recvmsg()
    Németh Márton wrote:
    > I'm working with usbip and I sometimes see a stall when I run
    > the "lsusb" command from the userspace. I added some debug messages
    > and it seems that the kernel_recvmsg() in
    > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=drivers/staging/usbip/usbip_common.c;h=210ef16bab8d271a52e5d36cd1994aad57ad99e1;hb=HEAD
    >
    > This is the only place I could find where the TCP messages are arriving in
    > the usbip code.
    >
    > What happens if a message does not arrive? Does it stall forever? If
    > yes, how can the kernel_recvmsg() call changed to handle some timeout?

    I found that the userspace manpage of recvmsg(2) ("man recvmsg") contains description
    of the "flags" parameter. I suppose the parameters and behaviour of the userspace
    recvmsg() is the same as the kernelspace kernel_recvmsg().


    Márton Németh
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