Re: Block device cache issue

[Avi Kivity]

Andrew Morton wrote:
> > should it perhaps be the case that the partition's buffers somehow be 
> > linked with those of the containing device, or even be part of them? I 
> > don't even know if this is possible without significant overhead in the 
> > page cache (of which my understanding is very shallow), but keep in mind 
> > that this behaviour almost led to filesystem corruption (luckily we only 
> > changed a single file and hit a single inode).
> >     
>
> It would incur overhead.  We could perhaps fix it by having a single
> cache for /dev/sda and then just making /dev/sda1 access that cache
> with an offset.

The offset can be non PAGE_SIZE aligned (and usually isn't, 63 sectors 
difference with normal partitioning).

--
error compiling committee.c: too many arguments to function

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