Messages in this thread | | | Subject | Re: [linux-usb-devel] Re: USB hangs | From | Alan Cox <> | Date | Mon, 12 Jan 2004 20:56:31 +0000 |
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On Llu, 2004-01-12 at 16:27, Alan Stern wrote: > 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.
Core scsi assumes that scsi drivers will use scsi_malloc/free so really ignores the issue as someone elses problem.
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