(2012/10/03 4:37), Andi Kleen wrote: > Takao Indoh <indou.takao at jp.fujitsu.com> writes: > >> These patches reset PCIe devices at boot time to address DMA problem on >> kdump with iommu. When "reset_devices" is specified, a hot reset is >> triggered on each PCIe root port and downstream port to reset its >> downstream endpoint. > > Great. I've been pondering this for a long time, but you did finally > implement it. I hope this will make kdump a lot more reliable at least > on the systems that support per port reset. Actually I got the idea of this patch from your comment below;-) http://permalink.gmane.org/gmane.linux.network/162414 > > Now the only question is: why make it a option and not default? Except kdump I don't know the situation where this reset is useful, so I introduced it as option so that it works only during kdump. Thanks, Takao Indoh
