Wei Liu 059dfa6a93 xen-netback: use jiffies_64 value to calculate credit timeout ... time_after_eq() only works if the delta is < MAX_ULONG/2. For a 32bit Dom0, if netfront sends packets at a very low rate, the time between subsequent calls to tx_credit_exceeded() may exceed MAX_ULONG/2 and the test for timer_after_eq() will be incorrect. Credit will not be replenished and the guest may become unable to send packets (e.g., if prior to the long gap, all credit was exhausted). Use jiffies_64 variant to mitigate this problem for 32bit Dom0. Suggested-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Wei Liu <wei.liu2@citrix.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com> Cc: Ian Campbell <ian.campbell@citrix.com> Cc: Jason Luan <jianhai.luan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2013-10-29 00:24:49 -04:00
..
common.h	xen-netback: use jiffies_64 value to calculate credit timeout	2013-10-29 00:24:49 -04:00
interface.c	xen-netback: use jiffies_64 value to calculate credit timeout	2013-10-29 00:24:49 -04:00
Makefile
netback.c	xen-netback: use jiffies_64 value to calculate credit timeout	2013-10-29 00:24:49 -04:00
xenbus.c	xen-netback: transition to CLOSED when removing a VIF	2013-10-08 16:15:51 -04:00