Re: 2.4.0-test10-pre3:Oops in mm/filemap.c:filemap_write_pa

[Linus Torvalds]

On Mon, 23 Oct 2000, Petr Vandrovec wrote:
> 
> With ClearPageDirty() kernel locked up (but no watchdog, so probably
> some livelock) during bootup after fsck /.

Yeah, the way the truncate logic works right now truncate_whole_page() has
to remove the page from the inode list - otherwise truncate ends up
looping forever trying to truncate that page ;).

And there was a off-by-one error in my first untested version anyway: the
page_count() should be tested against "2", not "1", as the truncate logic
has elevated the count anyway (probably unnecessarily: once we get the
page lock nobody else can race to remove it from the page cache anyway, so
it's not as if it could go away).

> Should I try ClearPageUptodate() instead?

No, I'll have to fix the truncate logic to allow for this all.

                Linus

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