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![]() We check tx avail through vhost_enable_notify() in the past which is
wrong since it only checks whether or not guest has filled more
available buffer since last avail idx synchronization which was just
done by vhost_vq_avail_empty() before. What we really want is checking
pending buffers in the avail ring. Fix this by calling
vhost_vq_avail_empty() instead.
This issue could be noticed by doing netperf TCP_RR benchmark as
client from guest (but not host). With this fix, TCP_RR from guest to
localhost restores from 1375.91 trans per sec to 55235.28 trans per
sec on my laptop (Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz).
Fixes:
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.. | ||
Kconfig | ||
Kconfig.vringh | ||
Makefile | ||
net.c | ||
scsi.c | ||
test.c | ||
test.h | ||
vhost.c | ||
vhost.h | ||
vringh.c | ||
vsock.c |