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    SubjectRe: [linux-usb-devel] 2.6.20 kernel hang with USB drive and vfat doing ftruncate
    On Wed, 21 Feb 2007, Andrew Morton wrote:

    > > > It seems like usb-storage and aio are completely off in the weeds.
    > > > Ideas?
    > >
    > > It seems usb-storage should remove some kmalloc and use mempool() for
    > > urb... Is someone working on this? And idea?
    > I think Pete said that we're supposed to be using GFP_NOIO in there.

    We _are_ using it.

    > Not that it'll help much: the VM calls throttle_vm_writeout() for GFP_NOIO
    > and GFP_NOFS allocations, which is a bug. Because if the caller holds
    > locks which prevent filesystem or IO progress, we deadlock.
    > I'll fix the VM if someone else fixes USB ;)

    What else needs to be fixed?

    Alan Stern

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      Last update: 2007-02-21 22:27    [W:0.029 / U:9.964 seconds]
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