Messages in this thread | | | Date | Wed, 21 Feb 2007 16:22:17 -0500 (EST) | From | Alan Stern <> | Subject | Re: [linux-usb-devel] 2.6.20 kernel hang with USB drive and vfat doing ftruncate |
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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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