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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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