Re: fs: page cache wrongly left invalidated after revalidate_disk

[Jeff Moyer]

MITSUNARI Shigeo <herumi@xxxxxxxxx> writes:

> Hi, 
>
> We found that bdev->bd_invalidated was left set once revalidate_disk() 
> is called, which results in page cache flush every time that device 
> is open. 
>
> Specifically, we found this problem in MD block device.  Once we 
> resize a MD device, mdadm --monitor periodically flush all page cache 
> for that device every 60 or 1000 seconds when it opens the device. 
>
> This bug lies since at least 3.2.0 till the latest kernel(3.6.2). 
> Patch is attached. 
>
> Anyone please review this?  Thanks in advance.

rescan_partitions (called in the bdev open path) should reset
bd_invalidated.  I think you need to dig into why that isn't happening.

Cheers,
Jeff
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/