On Tue, Dec 26, 2017 at 4:17 PM, Ross Zwisler
<ross.zwisler@xxxxxxxxxxxxxxx> wrote:
> On Sat, Dec 23, 2017 at 04:56:38PM -0800, Dan Williams wrote:
>> In preparation for examining the busy state of dax pages in the truncate
>> path, switch from sectors to pfns in the radix.
>>
>> Cc: Jan Kara <jack@xxxxxxx>
>> Cc: Jeff Moyer <jmoyer@xxxxxxxxxx>
>> Cc: Christoph Hellwig <hch@xxxxxx>
>> Cc: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
>> Cc: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
>> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
>> ---
>> drivers/dax/super.c | 15 ++++++++--
>> fs/dax.c | 75 ++++++++++++++++++---------------------------------
>> 2 files changed, 39 insertions(+), 51 deletions(-)
> <>
>> @@ -688,7 +685,7 @@ static int dax_writeback_one(struct block_device *bdev,
>> * compare sectors as we must not bail out due to difference in lockbit
>> * or entry type.
>> */
>
> Can you please also fix the comment above this test so it talks about pfns
> instead of sectors?
>
>> - if (dax_radix_sector(entry2) != dax_radix_sector(entry))
>> + if (dax_radix_pfn(entry2) != dax_radix_pfn(entry))
>> goto put_unlocked;
>> if (WARN_ON_ONCE(dax_is_empty_entry(entry) ||
>> dax_is_zero_entry(entry))) {
>> @@ -718,29 +715,11 @@ static int dax_writeback_one(struct block_device *bdev,
>> * 'entry'. This allows us to flush for PMD_SIZE and not have to
>> * worry about partial PMD writebacks.
>> */
>
> Ditto for this comment ^^^
>
Sure, will do.
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