Re: [PATCH] cramfs corruption after BLKFLSBUF on loop device

[Chris Mason]

On Thursday 01 June 2006 16:20, Olaf Hering wrote:
>  On Thu, Jun 01, Chris Mason wrote:
> > I think this will work (but have not tested it).  Another option is to
> > create a read_cache_page that pins the page via a page flag
> > that invalidate_mapping_pages will honor.
>
> PageLocked or PageDirty, the latter only with a mb().

The problem is we need the bit to be set before we set the page up to date.  A 
locked page will never make it through the readpage() mechanisms and a dirty 
page that isn't up to date is not quite legal.

For cramfs, dirty would work I suppose.

-chris
-
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/