62 lines
2.2 KiB
Diff
62 lines
2.2 KiB
Diff
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Changwei Ge <ge.changwei@h3c.com>
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Date: Wed, 31 Jan 2018 16:15:02 -0800
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Subject: [PATCH] ocfs2: make metadata estimation accurate and clear
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Current code assume that ::w_unwritten_list always has only one item on.
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This is not right and hard to get understood. So improve how to count
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unwritten item.
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Link: http://lkml.kernel.org/r/1515479070-32653-1-git-send-email-ge.changwei@h3c.com
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Signed-off-by: Changwei Ge <ge.changwei@h3c.com>
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Reported-by: John Lightsey <john@nixnuts.net>
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Tested-by: John Lightsey <john@nixnuts.net>
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Cc: Mark Fasheh <mfasheh@versity.com>
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Cc: Joseph Qi <jiangqi903@gmail.com>
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Cc: Junxiao Bi <junxiao.bi@oracle.com>
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Cc: Joel Becker <jlbec@evilplan.org>
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Cc: Changwei Ge <ge.changwei@h3c.com>
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Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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(cherry picked from commit 63de8bd9328bf2a778fc277503da163ae3defa3c)
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Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
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---
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fs/ocfs2/aops.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
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index 88a31e9340a0..77ec9b495027 100644
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--- a/fs/ocfs2/aops.c
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+++ b/fs/ocfs2/aops.c
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@@ -784,6 +784,7 @@ struct ocfs2_write_ctxt {
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struct ocfs2_cached_dealloc_ctxt w_dealloc;
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struct list_head w_unwritten_list;
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+ unsigned int w_unwritten_count;
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};
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void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages)
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@@ -1373,6 +1374,7 @@ static int ocfs2_unwritten_check(struct inode *inode,
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desc->c_clear_unwritten = 0;
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list_add_tail(&new->ue_ip_node, &oi->ip_unwritten_list);
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list_add_tail(&new->ue_node, &wc->w_unwritten_list);
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+ wc->w_unwritten_count++;
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new = NULL;
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unlock:
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spin_unlock(&oi->ip_lock);
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@@ -2246,7 +2248,7 @@ static int ocfs2_dio_get_block(struct inode *inode, sector_t iblock,
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ue->ue_phys = desc->c_phys;
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list_splice_tail_init(&wc->w_unwritten_list, &dwc->dw_zero_list);
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- dwc->dw_zero_count++;
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+ dwc->dw_zero_count += wc->w_unwritten_count;
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}
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ret = ocfs2_write_end_nolock(inode->i_mapping, pos, len, len, wc);
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--
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2.14.2
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