Messages in this thread | | | Subject | Re: 2.5.59-mm5 | From | Alex Tomas <> | Date | 24 Jan 2003 22:58:13 +0300 |
| |
>>>>> Andrew Morton (AM) writes:
AM> We cannot free disk blocks until I/O against them has completed. AM> Otherwise the block could be reused for something else, then the AM> old IO will scribble on the new data.
AM> What we _can_ do is to defer the waiting - only wait on the I/O AM> when someone reuses the disk blocks. So there are actually AM> unused blocks with I/O in flight against them.
AM> We do that for metadata (the wait happens in AM> unmap_underlying_metadata()) but for file data blocks there is no AM> mechanism in place to look them up
yeah! indeed. my stupid mistake ...
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |