On 2/22/2018 9:24 AM, Jason Wang wrote:

This reverts commit 762c330d670e3d4b795cf7a8d761866fdd1eef49. The
reason is we try to batch packets for devmap which causes calling
xdp_do_flush() under the process context. Simply disable premmption


   s/under/in/.
   Disabling preemption.

may not work since process may move among processors which lead
xdp_do_flush() to miss some flushes on some processors.

So simply revert the patch, a follow-up path will add the xdp flush
correctly.

Reported-by: Christoffer Dall <christoffer.d...@linaro.org>
Fixes: 762c330d670e ("tuntap: add missing xdp flush")
Signed-off-by: Jason Wang <jasow...@redhat.com>
[...]

MBR, Sergei

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