On 08/03/2016 05:33 PM, Ross Zwisler wrote:
> On Sun, Jun 5, 2016 at 1:32 PM, <mchristi@xxxxxxxxxx> wrote:
>> From: Mike Christie <mchristi@xxxxxxxxxx>
>>
>> The req operation REQ_OP is separated from the rq_flag_bits
>> definition. This converts the block layer drivers to
>> use req_op to get the op from the request struct.
>>
>> Signed-off-by: Mike Christie <mchristi@xxxxxxxxxx>
>> ---
>> drivers/block/loop.c | 6 +++---
>> drivers/block/mtip32xx/mtip32xx.c | 2 +-
>> drivers/block/nbd.c | 2 +-
>> drivers/block/rbd.c | 4 ++--
>> drivers/block/xen-blkfront.c | 8 +++++---
>> drivers/ide/ide-floppy.c | 2 +-
>> drivers/md/dm.c | 2 +-
>> drivers/mmc/card/block.c | 7 +++----
>> drivers/mmc/card/queue.c | 6 ++----
>
> Dave Chinner reported a deadlock with XFS + DAX, which I reproduced
> and bisected to this commit:
>
> commit c2df40dfb8c015211ec55f4b1dd0587f875c7b34
> Author: Mike Christie <mchristi@xxxxxxxxxx>
> Date: Sun Jun 5 14:32:17 2016 -0500
> drivers: use req op accessor
>
> Here are the steps to reproduce the deadlock with a BRD ramdisk:
>
> mkfs.xfs -f /dev/ram0
> mount -o dax /dev/ram0 /mnt/scratch
When using ramdisks, we need the attached patch like in your other bug
report. I think it will fix some hangs people are seeing.
I do not think that it should cause the failure to run issue you saw
when doing generic/008 and ext2.
convert-rw_page.patch
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