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    SubjectRe: 2.6.16-rc6-mm2
    "Rafael J. Wysocki" <rjw@sisk.pl> wrote:
    >
    > On Saturday 18 March 2006 13:40, Andrew Morton wrote:
    > >
    > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.16-rc6/2.6.16-rc6-mm2/
    >
    > I get the following oops from it 100% of the time (on boot):
    >
    > Trying to free ramdisk memory ... ----------- [cut here ] --------- [please bite here ] ---------
    > Kernel BUG at fs/buffer.c:1629
    > invalid opcode: 0000 [1] PREEMPT
    > last sysfs file: /block/hdc/range
    > CPU 0
    > Modules linked in:
    > Pid: 1, comm: swapper Not tainted 2.6.16-rc6-mm2 #16
    > RIP: 0010:[<ffffffff80280d9a>] <ffffffff80280d9a>{block_invalidatepage+202}
    > RSP: 0000:ffff81005ff07ac8 EFLAGS: 00010246
    > RAX: 0000000000000000 RBX: ffff810037c09138 RCX: ffff810037c09228
    > RDX: 0000000000000000 RSI: ffff81005ff07a88 RDI: 0000000000000000
    > RBP: ffff81005ff07af8 R08: 0000000000000002 R09: ffff81005ff07a99
    > R10: ffff810037c09138 R11: 0000000000000010 R12: ffff810037c09138
    > R13: 0000000000001000 R14: ffff810037c09138 R15: ffff810001c34e28
    > FS: 0000000000000000(0000) GS:ffffffff80690000(0000) knlGS:0000000000000000
    > CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
    > CR2: 00002afbe89a3000 CR3: 000000005fe36000 CR4: 00000000000006e0
    > Process swapper (pid: 1, threadinfo ffff81005ff06000, task ffff81005ff05530)
    > Stack: 0000000000000000 ffff810001c34e28 0000000000000002 0000000000000001
    > ffff810037df47e0 ffffffffffffffff ffff81005ff07b08 ffffffff8027f7b3
    > ffff81005ff07b28 ffffffff802610d5
    > Call Trace: <ffffffff8027f7b3>{do_invalidatepage+35}
    > <ffffffff802610d5>{truncate_complete_page+37} <ffffffff8026154f>{truncate_inode_pages_range+207}
    > <ffffffff802617c0>{truncate_inode_pages+16} <ffffffff803bac96>{rd_ioctl+86}

    Yeah, ramdisk does strange things.

    That's two. I guess I need to see if Neil left any other little timebombs
    in there for us ;)

    --- devel/fs/buffer.c~make-address_space_operations-invalidatepage-return-void-fix 2006-03-18 12:52:37.000000000 -0800
    +++ devel-akpm/fs/buffer.c 2006-03-18 12:53:04.000000000 -0800
    @@ -1624,10 +1624,8 @@ void block_invalidatepage(struct page *p
    * The get_block cached value has been unconditionally invalidated,
    * so real IO is not possible anymore.
    */
    - if (offset == 0) {
    - int ret = try_to_release_page(page, 0);
    - BUG_ON(!ret);
    - }
    + if (offset == 0)
    + try_to_release_page(page, 0);
    out:
    return;
    }
    _
    -
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