Andrea Arcangeli wrote:
>
> On Sat, 4 Mar 2000, Tigran Aivazian wrote:
>
> > d) now comes the interesting bit. Even after all the buffers have been
> >invalidated, those threads still continue happily reading and claiming
> >that the data is correct (i.e. as in the old disk).
>
> What do you mean with "claim". You never check the contents of the
> bh->b_data that you get from bread.
I do, in the thread_work_slow() version, i.e. The test1.c I released
happen to
call thread_work_fast() but I assume it is obvious that one just
switched to the slow version if needed (otherwise why would it be there
:)
> Anyway you should always call the bd_op->open/release of the blockdevice
> before/after calling bread/brelse. All the media_change stuff is done at
> blockdevice open time. If you don't open it, the media_change won't be
> detected.
Ah, I see. Thank you, that answers my question.
Regards,
Tigran.
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