On 20 Aug 2019, at 17:16, Ilya Maximets wrote:
Tx code doesn't clear the descriptor status after cleaning.
So, if the budget is larger than number of used elems in a ring, some
descriptors will be accounted twice and xsk_umem_complete_tx will move
prod_tail far beyond the prod_head breaking the comletion queue ring.
Fix that by limiting the number of descriptors to clean by the number
of used descriptors in the tx ring.
Fixes: 8221c5eba8c1 ("ixgbe: add AF_XDP zero-copy Tx support")
Signed-off-by: Ilya Maximets <i.maximets@xxxxxxxxxxx>
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Not tested yet because of lack of available hardware.
So, testing is very welcome.
Hi Ilya, this patch fixes the issue I reported earlier on the Open
vSwitch mailing list regarding complete queue overrun.
Tested-by: Eelco Chaudron <echaudro@xxxxxxxxxx>
<SNIP>
