Igor Druzhinin 07745894ea xen-netback: fix occasional leak of grant ref mappings under memory pressure ... [ Upstream commit 99e87f56b4 ] Zero-copy callback flag is not yet set on frag list skb at the moment xenvif_handle_frag_list() returns -ENOMEM. This eventually results in leaking grant ref mappings since xenvif_zerocopy_callback() is never called for these fragments. Those eventually build up and cause Xen to kill Dom0 as the slots get reused for new mappings: "d0v0 Attempt to implicitly unmap a granted PTE c010000329fce005" That behavior is observed under certain workloads where sudden spikes of page cache writes coexist with active atomic skb allocations from network traffic. Additionally, rework the logic to deal with frag_list deallocation in a single place. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-03-13 14:04:53 -07:00
..
common.h	xen-netback: vif counters from int/long to u64	2017-12-09 22:01:55 +01:00
hash.c	xen-netback: don't populate the hash cache on XenBus disconnect	2019-03-13 14:04:53 -07:00
interface.c	xen-netback: don't populate the hash cache on XenBus disconnect	2019-03-13 14:04:53 -07:00
Makefile
netback.c	xen-netback: fix occasional leak of grant ref mappings under memory pressure	2019-03-13 14:04:53 -07:00
rx.c
xenbus.c	xen-netback: protect resource cleaning on XenBus disconnect	2017-07-05 14:40:21 +02:00