Re: [PATCH] per-backing dev unplugging #2

From: Chris Mason
Date: Sun Mar 14 2004 - 15:56:20 EST

On Sun, 2004-03-14 at 15:47, Jens Axboe wrote:

> Thanks for fixing this Chris, I wonder why your back trace from this
> oops was so screwy (->unplug_io_fn() for the swap space was zero-filled,
> no?)

unplug_io_fn was zero filled...RIP was 0, so I knew I was following a
bad function pointer, but the rest of the trace was just handle_mm_fault
and a few others leading to block_sync_page.

Swap never showed in there, and I was a overly fixated on tracking down
someone calling lock_page without the inode pinned. The good news is
that I'm now pretty sure we don't call lock_page without the inode
pinned ;-)


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