GFS2: Use filemap_fdatawrite() to write back the AIL
In order to ensure that the mapping stats (and thus the bdi) are correctly updated, this patch changes the AIL writeback to use the filemap_datawrite function. This helps prevent stalls in balance_dirty_pages() due to large amounts of dirty metadata when there is little or no dirty data around. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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Родитель
1027efaa23
Коммит
5ac048bb7e
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@ -91,6 +91,7 @@ static void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
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__releases(&sdp->sd_ail_lock)
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__acquires(&sdp->sd_ail_lock)
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{
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struct gfs2_glock *gl = NULL;
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struct gfs2_bufdata *bd, *s;
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struct buffer_head *bh;
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int retry;
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@ -113,19 +114,13 @@ __acquires(&sdp->sd_ail_lock)
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if (!buffer_dirty(bh))
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continue;
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if (gl == bd->bd_gl)
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continue;
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gl = bd->bd_gl;
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list_move(&bd->bd_ail_st_list, &ai->ai_ail1_list);
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get_bh(bh);
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spin_unlock(&sdp->sd_ail_lock);
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lock_buffer(bh);
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if (test_clear_buffer_dirty(bh)) {
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bh->b_end_io = end_buffer_write_sync;
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submit_bh(WRITE_SYNC, bh);
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} else {
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unlock_buffer(bh);
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brelse(bh);
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}
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filemap_fdatawrite(gfs2_glock2aspace(gl));
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spin_lock(&sdp->sd_ail_lock);
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retry = 1;
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