linux-ext4 - Re: [PATCH 10/17] mm/filemap: make buffered writes work with RWF

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Message-ID: <c54063db-5f82-46d6-ba7b-5e4a0073ebf9@kernel.dk>
Date: Mon, 18 Nov 2024 07:49:58 -0700
From: Jens Axboe <axboe@...nel.dk>
To: Baokun Li <libaokun1@...wei.com>
Cc: linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, hannes@...xchg.org,
 clm@...a.com, linux-kernel@...r.kernel.org, willy@...radead.org,
 kirill@...temov.name, linux-btrfs@...r.kernel.org,
 linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org, bfoster@...hat.com,
 Yang Erkun <yangerkun@...wei.com>
Subject: Re: [PATCH 10/17] mm/filemap: make buffered writes work with
 RWF_UNCACHED

On 11/18/24 1:42 AM, Baokun Li wrote:
>> diff --git a/include/linux/fs.h b/include/linux/fs.h
>> index 45510d0b8de0..122ae821989f 100644
>> --- a/include/linux/fs.h
>> +++ b/include/linux/fs.h
>> @@ -2877,6 +2877,11 @@ static inline ssize_t generic_write_sync(struct kiocb *iocb, ssize_t count)
>>                   (iocb->ki_flags & IOCB_SYNC) ? 0 : 1);
>>           if (ret)
>>               return ret;
>> +    } else if (iocb->ki_flags & IOCB_UNCACHED) {
>> +        struct address_space *mapping = iocb->ki_filp->f_mapping;
>> +
>> +        filemap_fdatawrite_range_kick(mapping, iocb->ki_pos,
>> +                          iocb->ki_pos + count);
>>       }
>>   
> 
> Hi Jens,
> 
> The filemap_fdatawrite_range_kick() helper function is not added until
> the next patch, so you should swap the order of patch 10 and patch 11.

Ah thanks, not sure how I missed that. I'll swap them for the next
posting, and also do a basic bisection test just to ensure I did't do
more of those...

-- 
Jens Axboe