/*
 * Copyright (C) 2016 Oracle.  All Rights Reserved.
 *
 * Author: Darrick J. Wong <darrick.wong@oracle.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
 */
#ifndef __XFS_REFCOUNT_H__
#define __XFS_REFCOUNT_H__

extern int xfs_refcount_lookup_le(struct xfs_btree_cur *cur,
		xfs_agblock_t bno, int *stat);
extern int xfs_refcount_lookup_ge(struct xfs_btree_cur *cur,
		xfs_agblock_t bno, int *stat);
extern int xfs_refcount_get_rec(struct xfs_btree_cur *cur,
		struct xfs_refcount_irec *irec, int *stat);

enum xfs_refcount_intent_type {
	XFS_REFCOUNT_INCREASE = 1,
	XFS_REFCOUNT_DECREASE,
	XFS_REFCOUNT_ALLOC_COW,
	XFS_REFCOUNT_FREE_COW,
};

struct xfs_refcount_intent {
	struct list_head			ri_list;
	enum xfs_refcount_intent_type		ri_type;
	xfs_fsblock_t				ri_startblock;
	xfs_extlen_t				ri_blockcount;
};

extern int xfs_refcount_increase_extent(struct xfs_mount *mp,
		struct xfs_defer_ops *dfops, struct xfs_bmbt_irec *irec);
extern int xfs_refcount_decrease_extent(struct xfs_mount *mp,
		struct xfs_defer_ops *dfops, struct xfs_bmbt_irec *irec);

extern void xfs_refcount_finish_one_cleanup(struct xfs_trans *tp,
		struct xfs_btree_cur *rcur, int error);
extern int xfs_refcount_finish_one(struct xfs_trans *tp,
		struct xfs_defer_ops *dfops, enum xfs_refcount_intent_type type,
		xfs_fsblock_t startblock, xfs_extlen_t blockcount,
		xfs_fsblock_t *new_fsb, xfs_extlen_t *new_len,
		struct xfs_btree_cur **pcur);

extern int xfs_refcount_find_shared(struct xfs_btree_cur *cur,
		xfs_agblock_t agbno, xfs_extlen_t aglen, xfs_agblock_t *fbno,
		xfs_extlen_t *flen, bool find_end_of_shared);

extern int xfs_refcount_alloc_cow_extent(struct xfs_mount *mp,
		struct xfs_defer_ops *dfops, xfs_fsblock_t fsb,
		xfs_extlen_t len);
extern int xfs_refcount_free_cow_extent(struct xfs_mount *mp,
		struct xfs_defer_ops *dfops, xfs_fsblock_t fsb,
		xfs_extlen_t len);
extern int xfs_refcount_recover_cow_leftovers(struct xfs_mount *mp,
		xfs_agnumber_t agno);

#endif	/* __XFS_REFCOUNT_H__ */
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>tools</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/arch?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>arch</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/sparc?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>sparc</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/sparc/include?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/sparc/include/asm?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>asm</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/sparc/include/asm/barrier_64.h?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>barrier_64.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='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>Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;</td><td class='right'>2017-01-30 19:27:10 -0500</td></tr>
<tr><th>committer</th><td>Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;</td><td class='right'>2017-01-31 09:13:49 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/sparc/include/asm/barrier_64.h?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>79c6f448c8b79c321e4a1f31f98194e4f6b6cae7</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/arch/sparc/include/asm/barrier_64.h?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>370efda701f03cccf21e02bb1fdd3b852547d75c</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/arch/sparc/include/asm/barrier_64.h?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>tools/arch/sparc/include/asm/barrier_64.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/sparc/include/asm/barrier_64.h?id=0c744ea4f77d72b3dcebb7a8f2684633ec79be88'>0c744ea4f77d72b3dcebb7a8f2684633ec79be88</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/arch/sparc/include/asm/barrier_64.h?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7&amp;id2=0c744ea4f77d72b3dcebb7a8f2684633ec79be88'>diff</a>)</td></tr></table>
<div class='commit-subject'>tracing: Fix hwlat kthread migration</div><div class='commit-msg'>The hwlat tracer creates a kernel thread at start of the tracer. It is
pinned to a single CPU and will move to the next CPU after each period of
running. If the user modifies the migration thread's affinity, it will not
change after that happens.

The original code created the thread at the first instance it was called,
but later was changed to destroy the thread after the tracer was finished,
and would not be created until the next instance of the tracer was
established. The code that initialized the affinity was only called on the
initial instantiation of the tracer. After that, it was not initialized, and
the previous affinity did not match the current newly created one, making
it appear that the user modified the thread's affinity when it did not, and
the thread failed to migrate again.

Cc: stable@vger.kernel.org
Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs")
Signed-off-by: Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>Diffstat</a> (limited to 'tools/arch/sparc/include/asm/barrier_64.h')</div><table summary='diffstat' class='diffstat'>