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| author | Curt Wohlgemuth <curtw@google.com> | 2011-02-26 12:27:52 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-02-26 12:27:52 -0500 |
| commit | c7f5938adce6727b9d17785f289c1146bd88d678 (patch) | |
| tree | 000d17633b6b3b28dd644704afb501b366ad1bbb /fs/ext4 | |
| parent | e0fd9b90765f604374c42de8ac59d6584afce264 (diff) | |
| download | linux-3.10-c7f5938adce6727b9d17785f289c1146bd88d678.tar.gz linux-3.10-c7f5938adce6727b9d17785f289c1146bd88d678.tar.bz2 linux-3.10-c7f5938adce6727b9d17785f289c1146bd88d678.zip | |
ext4: fix ext4_da_block_invalidatepages() to handle page range properly
If ext4_da_block_invalidatepages() is called because of a
failure from ext4_map_blocks() in mpage_da_map_and_submit(),
it's supposed to clean up -- including unlock -- all the
pages in the mpd structure. But these values may not match
up, even on a system in which block size == page size:
mpd->b_blocknr != mpd->first_page
mpd->b_size != (mpd->next_page - mpd->first_page)
ext4_da_block_invalidatepages() has been using b_blocknr and
b_size; this patch changes it to use first_page and
next_page.
Tested: I injected a small number (5%) of failures in
ext4_map_blocks() in the case that the flags contain
EXT4_GET_BLOCKS_DELALLOC_RESERVE, and ran fsstress on this
kernel. Without this patch, I got hung tasks every time.
With this patch, I see no hangs in many runs of fsstress.
Signed-off-by: Curt Wohlgemuth <curtw@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/inode.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index fd369dbce6a..e878c3a7aaf 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -2165,8 +2165,7 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd, return ret; } -static void ext4_da_block_invalidatepages(struct mpage_da_data *mpd, - sector_t logical, long blk_cnt) +static void ext4_da_block_invalidatepages(struct mpage_da_data *mpd) { int nr_pages, i; pgoff_t index, end; @@ -2174,9 +2173,8 @@ static void ext4_da_block_invalidatepages(struct mpage_da_data *mpd, struct inode *inode = mpd->inode; struct address_space *mapping = inode->i_mapping; - index = logical >> (PAGE_CACHE_SHIFT - inode->i_blkbits); - end = (logical + blk_cnt - 1) >> - (PAGE_CACHE_SHIFT - inode->i_blkbits); + index = mpd->first_page; + end = mpd->next_page - 1; while (index <= end) { nr_pages = pagevec_lookup(&pvec, mapping, index, PAGEVEC_SIZE); if (nr_pages == 0) @@ -2312,8 +2310,7 @@ static void mpage_da_map_and_submit(struct mpage_da_data *mpd) ext4_print_free_blocks(mpd->inode); } /* invalidate all the pages */ - ext4_da_block_invalidatepages(mpd, next, - mpd->b_size >> mpd->inode->i_blkbits); + ext4_da_block_invalidatepages(mpd); /* Mark this page range as having been completed */ mpd->io_done = 1; |