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    SubjectRe: [linux-usb-devel] Re: USB hangs
    On Mon, 12 Jan 2004, Oliver Neukum wrote:

    > In 2.4 they all run in interrupt or thread context IIRC.
    > Problematic is the SCSI error handling thread. It can call usb_reset_device()
    > which calls down and does allocations.
    > Does that thread also do the PF_MEMALLOC trick?

    In 2.4 it doesn't, which is rather surpising considering how many storage
    devices run over SCSI transports.

    In 2.6 it sets PF_IOTHREAD. I don't know if that subsumes the function of
    PF_MEMALLOC or not. The state of kerneldoc for much of the Linux core
    functionality is shocking.

    Alan Stern

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