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ocfs2: make metadata estimation accurate and clear

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Current code assume that ::w_unwritten_list always has only one item on.
This is not right and hard to get understood.  So improve how to count
unwritten item.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Changwei Ge <[email protected]>
Reported-by: John Lightsey <[email protected]>
Tested-by: John Lightsey <[email protected]>
Cc: Mark Fasheh <[email protected]>
Cc: Joseph Qi <[email protected]>
Cc: Junxiao Bi <[email protected]>
Cc: Joel Becker <[email protected]>
Cc: Changwei Ge <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Changwei Ge 2018-01-31 16:15:02 -08:00 • committed by Linus Torvalds
commit 63de8bd932
1 changed files with 3 additions and 1 deletions
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4
fs/ocfs2/aops.c
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@ -797,6 +797,7 @@ struct ocfs2_write_ctxt {
struct ocfs2_cached_dealloc_ctxt w_dealloc;
struct list_head w_unwritten_list;
unsigned int w_unwritten_count;
};
void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages)
@ -1386,6 +1387,7 @@ retry:
desc->c_clear_unwritten = 0;
list_add_tail(&new->ue_ip_node, &oi->ip_unwritten_list);
list_add_tail(&new->ue_node, &wc->w_unwritten_list);
wc->w_unwritten_count++;
new = NULL;
unlock:
spin_unlock(&oi->ip_lock);
@ -2256,7 +2258,7 @@ static int ocfs2_dio_wr_get_block(struct inode *inode, sector_t iblock,
ue->ue_phys = desc->c_phys;
list_splice_tail_init(&wc->w_unwritten_list, &dwc->dw_zero_list);
dwc->dw_zero_count++;
dwc->dw_zero_count += wc->w_unwritten_count;
}
ret = ocfs2_write_end_nolock(inode->i_mapping, pos, len, len, wc);