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ext4: split off ext4_journalled_invalidatepage()

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In data=journal mode we don't need delalloc or DIO handling in invalidatepage
and similarly in other modes we don't need the journal handling. So split
invalidatepage implementations.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Jan Kara 2012-12-25 13:28:54 -05:00 committed by Theodore Ts'o
parent d7961c7fa4
commit 4520fb3c36
2 changed files with 29 additions and 8 deletions
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23
fs/ext4/inode.c
View File

@ -2880,8 +2880,6 @@ static void ext4_invalidatepage_free_endio(struct page *page, unsigned long offs
static void ext4_invalidatepage(struct page *page, unsigned long offset)
{
journal_t *journal = EXT4_JOURNAL(page->mapping->host);
trace_ext4_invalidatepage(page, offset);
/*
@ -2889,16 +2887,27 @@ static void ext4_invalidatepage(struct page *page, unsigned long offset)
*/
if (ext4_should_dioread_nolock(page->mapping->host))
ext4_invalidatepage_free_endio(page, offset);
/* No journalling happens on data buffers when this function is used */
WARN_ON(page_has_buffers(page) && buffer_jbd(page_buffers(page)));
block_invalidatepage(page, offset);
}
static void ext4_journalled_invalidatepage(struct page *page,
unsigned long offset)
{
journal_t *journal = EXT4_JOURNAL(page->mapping->host);
trace_ext4_journalled_invalidatepage(page, offset);
/*
* If it's a full truncate we just forget about the pending dirtying
*/
if (offset == 0)
ClearPageChecked(page);
if (journal)
jbd2_journal_invalidatepage(journal, page, offset);
else
block_invalidatepage(page, offset);
jbd2_journal_invalidatepage(journal, page, offset);
}
static int ext4_releasepage(struct page *page, gfp_t wait)
@ -3264,7 +3273,7 @@ static const struct address_space_operations ext4_journalled_aops = {
.write_end = ext4_journalled_write_end,
.set_page_dirty = ext4_journalled_set_page_dirty,
.bmap = ext4_bmap,
.invalidatepage = ext4_invalidatepage,
.invalidatepage = ext4_journalled_invalidatepage,
.releasepage = ext4_releasepage,
.direct_IO = ext4_direct_IO,
.is_partially_uptodate = block_is_partially_uptodate,

14
include/trace/events/ext4.h
View File

@ -451,7 +451,7 @@ DEFINE_EVENT(ext4__page_op, ext4_releasepage,
TP_ARGS(page)
);
TRACE_EVENT(ext4_invalidatepage,
DECLARE_EVENT_CLASS(ext4_invalidatepage_op,
TP_PROTO(struct page *page, unsigned long offset),
TP_ARGS(page, offset),
@ -477,6 +477,18 @@ TRACE_EVENT(ext4_invalidatepage,
(unsigned long) __entry->index, __entry->offset)
);
DEFINE_EVENT(ext4_invalidatepage_op, ext4_invalidatepage,
TP_PROTO(struct page *page, unsigned long offset),
TP_ARGS(page, offset)
);
DEFINE_EVENT(ext4_invalidatepage_op, ext4_journalled_invalidatepage,
TP_PROTO(struct page *page, unsigned long offset),
TP_ARGS(page, offset)
);
TRACE_EVENT(ext4_discard_blocks,
TP_PROTO(struct super_block *sb, unsigned long long blk,
unsigned long long count),