#include "tests.h" #include "machine.h" #include "thread.h" #include "map.h" #include "debug.h" int test__thread_mg_share(int subtest __maybe_unused) { struct machines machines; struct machine *machine; /* thread group */ struct thread *leader; struct thread *t1, *t2, *t3; struct map_groups *mg; /* other process */ struct thread *other, *other_leader; struct map_groups *other_mg; /* * This test create 2 processes abstractions (struct thread) * with several threads and checks they properly share and * maintain map groups info (struct map_groups). * * thread group (pid: 0, tids: 0, 1, 2, 3) * other group (pid: 4, tids: 4, 5) */ machines__init(&machines); machine = &machines.host; /* create process with 4 threads */ leader = machine__findnew_thread(machine, 0, 0); t1 = machine__findnew_thread(machine, 0, 1); t2 = machine__findnew_thread(machine, 0, 2); t3 = machine__findnew_thread(machine, 0, 3); /* and create 1 separated process, without thread leader */ other = machine__findnew_thread(machine, 4, 5); TEST_ASSERT_VAL("failed to create threads", leader && t1 && t2 && t3 && other); mg = leader->mg; TEST_ASSERT_EQUAL("wrong refcnt", atomic_read(&mg->refcnt), 4); /* test the map groups pointer is shared */ TEST_ASSERT_VAL("map groups don't match", mg == t1->mg); TEST_ASSERT_VAL("map groups don't match", mg == t2->mg); TEST_ASSERT_VAL("map groups don't match", mg == t3->mg); /* * Verify the other leader was created by previous call. * It should have shared map groups with no change in * refcnt. */ other_leader = machine__find_thread(machine, 4, 4); TEST_ASSERT_VAL("failed to find other leader", other_leader); /* * Ok, now that all the rbtree related operations were done, * lets remove all of them from there so that we can do the * refcounting tests. */ machine__remove_thread(machine, leader); machine__remove_thread(machine, t1); machine__remove_thread(machine, t2); machine__remove_thread(machine, t3); machine__remove_thread(machine, other); machine__remove_thread(machine, other_leader); other_mg = other->mg; TEST_ASSERT_EQUAL("wrong refcnt", atomic_read(&other_mg->refcnt), 2); TEST_ASSERT_VAL("map groups don't match", other_mg == other_leader->mg); /* release thread group */ thread__put(leader); TEST_ASSERT_EQUAL("wrong refcnt", atomic_read(&mg->refcnt), 3); thread__put(t1); TEST_ASSERT_EQUAL("wrong refcnt", atomic_read(&mg->refcnt), 2); thread__put(t2); TEST_ASSERT_EQUAL("wrong refcnt", atomic_read(&mg->refcnt), 1); thread__put(t3); /* release other group */ thread__put(other_leader); TEST_ASSERT_EQUAL("wrong refcnt", atomic_read(&other_mg->refcnt), 1); thread__put(other); machines__exit(&machines); return 0; } 0552fe508c'>root/sound/pci/oxygen/wm8785.h
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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 /sound/pci/oxygen/wm8785.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 'sound/pci/oxygen/wm8785.h')