Re: [path 2.6] reduce ext3 log spamming (blank lines)

[Andrew Morton]

David Brownell <david-b@xxxxxxxxxxx> wrote:
>
> When drives go offline, e.g. usb-storage disconnect, the
> upper layers don't behave very intelligently yet:  ext3
> over scsi keeps retrying reads, logging three lines for
> each error:
> 
> 10:58:31  scsi0 (0:0): rejecting I/O to dead device
> 10:58:31  EXT3-fs error (device sda1): ext3_find_entry: reading directory #18089296 offset 0
> 10:58:31  
> 10:58:55  scsi0 (0:0): rejecting I/O to dead device
> ...
> This patch shrinks that log spam by the trivial third, getting
> rid of those needless blank lines.

Thanks.

>  It's not clear to me why
> the "no such device" errors don't immediately make ext3
> (or is it the block layer?) give up ... maybe someone else
> can make Linux not retry after those errors.

It's probably ext3 directory readahead.

We deliberately ignore I/O error when reading directories so that if you
have a bad block in a directory it is still possible to recover files which
are addressed by later blocks.

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