subject:"\[E1000\-devel\] \[PATCH net v3\] e1000\: add dummy allocator to fix race condition between mtu change and netpoll"

Re: [E1000-devel] [PATCH net v3] e1000: add dummy allocator to fix race condition between mtu change and netpoll

2015-02-25 Thread Jeff Kirsher

On Wed, 2015-02-25 at 12:26 +0100, Sabrina Dubroca wrote: > There is a race condition between e1000_change_mtu's cleanups and > netpoll, when we change the MTU across jumbo size: > > Changing MTU frees all the rx buffers: > e1000_change_mtu -> e1000_down -> e1000_clean_all_rx_rings -> >

[E1000-devel] [PATCH net v3] e1000: add dummy allocator to fix race condition between mtu change and netpoll

2015-02-25 Thread Sabrina Dubroca

There is a race condition between e1000_change_mtu's cleanups and netpoll, when we change the MTU across jumbo size: Changing MTU frees all the rx buffers: e1000_change_mtu -> e1000_down -> e1000_clean_all_rx_rings -> e1000_clean_rx_ring Then, close to the end of e1000_change_mtu: