[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH net V2] xen-netback: use jiffies_64 value to calculate credit timeout
On 28/10/2013 11:35, Wei Liu wrote: > 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. Reviewed-by: David Vrabel <david.vrabel@xxxxxxxxxx> David _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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