Re: mount stuck, khubd blocked
From: Jeff Moyer
Date: Mon Jul 23 2012 - 15:22:24 EST
Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> writes:
> On Wed, 20 Jun 2012, Jeff Moyer wrote:
>
>> Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> writes:
>>
>> > On Tue, 19 Jun 2012, Dima Tisnek wrote:
>> >
>> >> I made a microsd flash with 2 partitions, sdb1 is data partition, and
>> >> sdb2 is a sentinel partition, 1 block in size.
>> >>
>> >> I attached the usb-microsd reader with that card in it and by mistake
>> >> tried to mount the sentinel partition, I ran:
>> >> mount /dev/sdb2 /mnt/flash/
>> >>
>> >> mount got stuck, I was not able to kill or strace it, I pulled the usb
>> >> reader from the port, mount was still stuck, here's the dmesg log:
>>
>> Hi, Dima,
>>
>> Could you try the following patch?
>>
>> Thanks,
>> Jeff
>>
>> diff --git a/fs/buffer.c b/fs/buffer.c
>> index 838a9cf..769b30b 100644
>> --- a/fs/buffer.c
>> +++ b/fs/buffer.c
>> @@ -930,7 +930,7 @@ init_page_buffers(struct page *page, struct block_device *bdev,
>> bh->b_blocknr = block;
>> if (uptodate)
>> set_buffer_uptodate(bh);
>> - if (block < end_block)
>> + if (block <= end_block)
>> set_buffer_mapped(bh);
>> }
>> block++;
>
> Jeff, does this also fix Bugzilla #43269?
First, this patch is wrong. I posted another version later on that got
merged for 3.5.
As for bug 43269, it does not look like the same symptoms, so I would
not expect the patches I posted to resolve that issue. Sorry.
Cheers,
Jeff
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