Hello, Alan. On Wed, Jul 27, 2016 at 02:54:51PM -0400, Alan Stern wrote: > > Hmm... I didn't know the whole USB stack could operate without > > allocating memory. Does usb stack have mempools and stuff all the way > > through? > > No -- the USB stack does need to allocate memory in order to operate. > But it is careful to use GFP_NOIO or GFP_ATOMIC for allocations that > might be on the block-device path.
Hmm... That doesn't really make them dependable during memory reclaim. What happens when those allocations fail? Thanks. -- tejun
