#undef TRACE_SYSTEM
#define TRACE_SYSTEM cgroup

#if !defined(_TRACE_CGROUP_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_CGROUP_H

#include <linux/cgroup.h>
#include <linux/tracepoint.h>

DECLARE_EVENT_CLASS(cgroup_root,

	TP_PROTO(struct cgroup_root *root),

	TP_ARGS(root),

	TP_STRUCT__entry(
		__field(	int,		root			)
		__field(	u16,		ss_mask			)
		__string(	name,		root->name		)
	),

	TP_fast_assign(
		__entry->root = root->hierarchy_id;
		__entry->ss_mask = root->subsys_mask;
		__assign_str(name, root->name);
	),

	TP_printk("root=%d ss_mask=%#x name=%s",
		  __entry->root, __entry->ss_mask, __get_str(name))
);

DEFINE_EVENT(cgroup_root, cgroup_setup_root,

	TP_PROTO(struct cgroup_root *root),

	TP_ARGS(root)
);

DEFINE_EVENT(cgroup_root, cgroup_destroy_root,

	TP_PROTO(struct cgroup_root *root),

	TP_ARGS(root)
);

DEFINE_EVENT(cgroup_root, cgroup_remount,

	TP_PROTO(struct cgroup_root *root),

	TP_ARGS(root)
);

DECLARE_EVENT_CLASS(cgroup,

	TP_PROTO(struct cgroup *cgrp),

	TP_ARGS(cgrp),

	TP_STRUCT__entry(
		__field(	int,		root			)
		__field(	int,		id			)
		__field(	int,		level			)
		__dynamic_array(char,		path,
				cgrp->kn ? cgroup_path(cgrp, NULL, 0) + 1
					 : strlen("(null)"))
	),

	TP_fast_assign(
		__entry->root = cgrp->root->hierarchy_id;
		__entry->id = cgrp->id;
		__entry->level = cgrp->level;
		if (cgrp->kn)
			cgroup_path(cgrp, __get_dynamic_array(path),
				    __get_dynamic_array_len(path));
		else
			__assign_str(path, "(null)");
	),

	TP_printk("root=%d id=%d level=%d path=%s",
		  __entry->root, __entry->id, __entry->level, __get_str(path))
);

DEFINE_EVENT(cgroup, cgroup_mkdir,

	TP_PROTO(struct cgroup *cgroup),

	TP_ARGS(cgroup)
);

DEFINE_EVENT(cgroup, cgroup_rmdir,

	TP_PROTO(struct cgroup *cgroup),

	TP_ARGS(cgroup)
);

DEFINE_EVENT(cgroup, cgroup_release,

	TP_PROTO(struct cgroup *cgroup),

	TP_ARGS(cgroup)
);

DEFINE_EVENT(cgroup, cgroup_rename,

	TP_PROTO(struct cgroup *cgroup),

	TP_ARGS(cgroup)
);

DECLARE_EVENT_CLASS(cgroup_migrate,

	TP_PROTO(struct cgroup *dst_cgrp, struct task_struct *task, bool threadgroup),

	TP_ARGS(dst_cgrp, task, threadgroup),

	TP_STRUCT__entry(
		__field(	int,		dst_root		)
		__field(	int,		dst_id			)
		__field(	int,		dst_level		)
		__dynamic_array(char,		dst_path,
				dst_cgrp->kn ? cgroup_path(dst_cgrp, NULL, 0) + 1
					     : strlen("(null)"))
		__field(	int,		pid			)
		__string(	comm,		task->comm		)
	),

	TP_fast_assign(
		__entry->dst_root = dst_cgrp->root->hierarchy_id;
		__entry->dst_id = dst_cgrp->id;
		__entry->dst_level = dst_cgrp->level;
		if (dst_cgrp->kn)
			cgroup_path(dst_cgrp, __get_dynamic_array(dst_path),
				    __get_dynamic_array_len(dst_path));
		else
			__assign_str(dst_path, "(null)");
		__entry->pid = task->pid;
		__assign_str(comm, task->comm);
	),

	TP_printk("dst_root=%d dst_id=%d dst_level=%d dst_path=%s pid=%d comm=%s",
		  __entry->dst_root, __entry->dst_id, __entry->dst_level,
		  __get_str(dst_path), __entry->pid, __get_str(comm))
);

DEFINE_EVENT(cgroup_migrate, cgroup_attach_task,

	TP_PROTO(struct cgroup *dst_cgrp, struct task_struct *task, bool threadgroup),

	TP_ARGS(dst_cgrp, task, threadgroup)
);

DEFINE_EVENT(cgroup_migrate, cgroup_transfer_tasks,

	TP_PROTO(struct cgroup *dst_cgrp, struct task_struct *task, bool threadgroup),

	TP_ARGS(dst_cgrp, task, threadgroup)
);

#endif /* _TRACE_CGROUP_H */

/* This part must be outside protection */
#include <trace/define_trace.h>
ue='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Dexuan Cui &lt;decui@microsoft.com&gt;</td><td class='right'>2017-01-28 11:46:02 -0700</td></tr>
<tr><th>committer</th><td>Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;</td><td class='right'>2017-01-31 10:59:48 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/devlink.h?id=433e19cf33d34bb6751c874a9c00980552fe508c'>433e19cf33d34bb6751c874a9c00980552fe508c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/net/devlink.h?id=433e19cf33d34bb6751c874a9c00980552fe508c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=433e19cf33d34bb6751c874a9c00980552fe508c'>ce6547ef2987fbb289fa28f03536328a42781651</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/net/devlink.h?id=433e19cf33d34bb6751c874a9c00980552fe508c'>include/net/devlink.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/devlink.h?id=191e885a2e130e639bb0c8ee350d7047294f2ce6'>191e885a2e130e639bb0c8ee350d7047294f2ce6</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/net/devlink.h?id=433e19cf33d34bb6751c874a9c00980552fe508c&amp;id2=191e885a2e130e639bb0c8ee350d7047294f2ce6'>diff</a>)</td></tr></table>
<div class='commit-subject'>Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()</div><div class='commit-msg'>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 &lt; 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 &lt;decui@microsoft.com&gt;
Reported-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Tested-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Cc: "K. Y. Srinivasan" &lt;kys@microsoft.com&gt;
Cc: Haiyang Zhang &lt;haiyangz@microsoft.com&gt;
Cc: Stephen Hemminger &lt;sthemmin@microsoft.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Signed-off-by: K. Y. Srinivasan &lt;kys@microsoft.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=433e19cf33d34bb6751c874a9c00980552fe508c'>Diffstat</a> (limited to 'include/net/devlink.h')</div><table summary='diffstat' class='diffstat'>