#ifndef _RDS_INFO_H #define _RDS_INFO_H struct rds_info_lengths { unsigned int nr; unsigned int each; }; struct rds_info_iterator; /* * These functions must fill in the fields of @lens to reflect the size * of the available info source. If the snapshot fits in @len then it * should be copied using @iter. The caller will deduce if it was copied * or not by comparing the lengths. */ typedef void (*rds_info_func)(struct socket *sock, unsigned int len, struct rds_info_iterator *iter, struct rds_info_lengths *lens); void rds_info_register_func(int optname, rds_info_func func); void rds_info_deregister_func(int optname, rds_info_func func); int rds_info_getsockopt(struct socket *sock, int optname, char __user *optval, int __user *optlen); void rds_info_copy(struct rds_info_iterator *iter, void *data, unsigned long bytes); void rds_info_iter_unmap(struct rds_info_iterator *iter); #endif lass='form'>
net-next plumbingsTobias Klauser
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authorDexuan Cui <decui@microsoft.com>2017-01-28 11:46:02 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 10:59:48 +0100
commit433e19cf33d34bb6751c874a9c00980552fe508c (patch)
treece6547ef2987fbb289fa28f03536328a42781651 /include/uapi/asm-generic/kvm_para.h
parent191e885a2e130e639bb0c8ee350d7047294f2ce6 (diff)
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/uapi/asm-generic/kvm_para.h')