On Wed, May 11, 2011 at 1:56 AM, Allison Henderson <achender@xxxxxxxxxxxxxxxxxx> wrote: > Hi All, > > We've been trying to get punch hole through some extended fsx tests, and I ran across some other tests that were failing because the test file contained zeros where it shouldn't. I made this fix to the ext4_ext_convert_to_initialized What do you mean zeros here? Some useful data is zeroed? and the test has been running smooth for about an hour now. Yongqiang, this one looks like it may have been associated with the split extents clean up patch. Would you mind taking a look at this fix and giving it your ok if it looks good? Thx! > > Signed-off-by: Allison Henderson <achender@xxxxxxxxxx> > --- > :100644 100644 e363f21... ce69450... M fs/ext4/extents.c > fs/ext4/extents.c | 3 ++- > 1 files changed, 2 insertions(+), 1 deletions(-) > > diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c > index e363f21..ce69450 100644 > --- a/fs/ext4/extents.c > +++ b/fs/ext4/extents.c > @@ -2819,7 +2819,8 @@ static int ext4_ext_convert_to_initialized(handle_t *handle, > /* case 3 */ > zero_ex.ee_block = > cpu_to_le32(map->m_lblk + map->m_len); > - zero_ex.ee_len = cpu_to_le16(allocated - map->m_len); > + zero_ex.ee_len = cpu_to_le16(ee_len - > + allocated - map->m_len); The logic is that we splits [ee_block, ee_block + ee_len) into [ee_block, map->m_blk) that is uninitialized and [map->m_blk, ee_block + ee_len) that is initialized. We need to zero [map->m_lblk + map->m_len, ee_block + ee_len). and [map->m_lblk, map->m_lblk + map->m_len) is zeroed by upper layer because of MAP_NEW flag. Right logic? I can not see the error and the meaning of ee_len - allocated - map->m_len. Thanks, Yongqiang. > ext4_ext_store_pblock(&zero_ex, > ext4_ext_pblock(ex) + map->m_lblk - ee_block); > err = ext4_ext_zeroout(inode, &zero_ex); > -- > 1.7.1 > > -- Best Wishes Yongqiang Yang -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
