Re: [PATCH] superbh, fractured blocks, and grouped io

From: Joel Becker (
Date: Thu Oct 17 2002 - 01:45:10 EST

On Thu, Oct 17, 2002 at 07:59:42AM +0200, Jens Axboe wrote:
> Eh no, it actually doesn't bounce anything! I added a test to bypass
> bouncing temporarily in blk_queue_bounce() (see the BH_Super test in
> there), but forgot to replace it with the real thing. The superbh
> contains no data, so is not a candidate for bouncing.

        I understand that the superbh isn't a candidate for bouncing.
The problem is that the rest of the bhs are, and they never get bounced.
scsi_merge.c checks "if (PageHighMem(bh->b_page)) BUG();" in
__init_io(), and that obviously crashes.



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Joel Becker Senior Member of Technical Staff Oracle Corporation E-mail: Phone: (650) 506-8127 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to More majordomo info at Please read the FAQ at

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