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From: Thomas Schlichter <thomas.schlichter@web.de>
To: Andrew Morton <akpm@osdl.org>
Subject: Re: 2.6.4-mm2
Date: Mon, 15 Mar 2004 22:08:47 +0100
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On Monday, March 15. 2004 21:57, I wrote:
> Hi,
>
> with 2.6.4-mm2 I get following badness on boot:
>
> Badness in as_insert_request at drivers/block/as-iosched.c:1513
> Call Trace:
>  [<c022e326>] as_insert_request+0x166/0x190
>  [<c0225af8>] __elv_add_request+0x28/0x60
>  [<c0228b9b>] __make_request+0x47b/0x540
>  [<c0228d75>] generic_make_request+0x115/0x1d0
>  [<c011efd0>] autoremove_wake_function+0x0/0x40
>  [<c0228e80>] submit_bio+0x50/0xf0
>  [<c0162f58>] __bio_add_page+0x88/0x110
>  [<c016300c>] bio_add_page+0x2c/0x40
>  [<c013be4f>] submit+0x9f/0xf0
>  [<c03aa14a>] check_sig+0x1a/0x70
>  [<c03aa4b6>] read_suspend_image+0x6/0x60
>  [<c03aa565>] pmdisk_read+0x55/0x70
>  [<c013b1a5>] pm_resume+0x15/0x90
>  [<c039c7a3>] do_initcalls+0x23/0xc0
>  [<c0103090>] init+0x0/0x150
>  [<c01030c5>] init+0x35/0x150
>  [<c0105288>] kernel_thread_helper+0x0/0x18
>  [<c010528d>] kernel_thread_helper+0x5/0x18
>
> After that one I get many badnesses in line 977 of the same file. I
> commented out that WARN_ON(..) to be able to capture the badness above. The
> message before the badness is:
> 	PM: Reading pmdisk image.
> After the badness following message is printed:
> 	PM: Resume from disk failed.
>
> So there seems to be a conflict between PM-resume (btw, I did not use
> suspend to disk) and as-iosched. There is no problem if I use
> "elevator=cfq", "elevator=deadline" or "elevator=noop".

Now I verified that "pmdisk=off" also removes the badnesses...

Regards
   Thomas

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