Can you test with the below patch Commit 487caeef9fc08c0565e082c40a8aaf58dad92bbb fixed a deadlock between get_block and truncate by dropping the i_data_sem during truncate. But i guess we should make sure we drop any preallocation that we did as a part of the block allocation. Otherwise we definitely can get multiple claimed blocks. But this can happen only if we have block allocation and truncate happening on the same file simultaneously. With delayed allocation i guess it is possible that pdflush tries to do block allocation while application does a truncate diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 10539e3..14539b5 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -113,6 +113,7 @@ static int ext4_ext_truncate_extend_restart(handle_t *handle, */ ext4_ext_invalidate_cache(inode); + ext4_discard_preallocations(inode); return err; } -- 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
