4513899092
Instead of using a list of buffers to write ahead of the journal flush, this now uses a list of inodes and calls ->writepages via filemap_fdatawrite() in order to achieve the same thing. For most use cases this results in a shorter ordered write list, as well as much larger i/os being issued. The ordered write list is sorted by inode number before writing in order to retain the disk block ordering between inodes as per the previous code. The previous ordered write code used to conflict in its assumptions about how to write out the disk blocks with mpage_writepages() so that with this updated version we can also use mpage_writepages() for GFS2's ordered write, writepages implementation. So we will also send larger i/os from writeback too. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License version 2.
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*/
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#ifndef __LOG_DOT_H__
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#define __LOG_DOT_H__
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/writeback.h>
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#include "incore.h"
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/**
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* gfs2_log_lock - acquire the right to mess with the log manager
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* @sdp: the filesystem
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*
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*/
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static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
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__acquires(&sdp->sd_log_lock)
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{
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spin_lock(&sdp->sd_log_lock);
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}
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/**
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* gfs2_log_unlock - release the right to mess with the log manager
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* @sdp: the filesystem
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*
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*/
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static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
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__releases(&sdp->sd_log_lock)
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{
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spin_unlock(&sdp->sd_log_lock);
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}
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static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
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unsigned int value)
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{
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if (++value == sdp->sd_jdesc->jd_blocks) {
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value = 0;
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}
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sdp->sd_log_head = sdp->sd_log_tail = value;
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}
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static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
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{
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struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
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if (!test_bit(GIF_ORDERED, &ip->i_flags)) {
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spin_lock(&sdp->sd_ordered_lock);
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if (!test_and_set_bit(GIF_ORDERED, &ip->i_flags))
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list_add(&ip->i_ordered, &sdp->sd_log_le_ordered);
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spin_unlock(&sdp->sd_ordered_lock);
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}
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}
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extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
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extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
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unsigned int ssize);
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extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
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extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl);
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extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
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extern void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
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extern void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc);
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extern void gfs2_log_shutdown(struct gfs2_sbd *sdp);
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extern void gfs2_meta_syncfs(struct gfs2_sbd *sdp);
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extern int gfs2_logd(void *data);
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#endif /* __LOG_DOT_H__ */
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