lkml.org 
[lkml]   [2022]   [Apr]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [f2fs-dev] [PATCH 2/2] f2fs: keep io_flags to avoid IO split due to different op_flags in two fio holders
From
On 2022/4/20 6:47, Jaegeuk Kim wrote:
> On 04/17, Chao Yu wrote:
>> On 2022/4/13 23:49, Jaegeuk Kim wrote:
>>> Let's attach io_flags to bio only, so that we can merge IOs given original
>>> io_flags only.
>>>
>>> Fixes: 64bf0eef0171 ("f2fs: pass the bio operation to bio_alloc_bioset")
>>
>> Nice catch.
>>
>> Wasn't this bug introduced by:
>
> I don't think so.

Oh, correct, it looks in original patch, we only attach IO flag before
__submit_bio().

Reviewed-by: Chao Yu <chao@kernel.org>

Thanks,

>
>>
>> commit da9953b729c1 ("f2fs: introduce sysfs/data_io_flag to attach REQ_META/FUA")
>>
>> static void __attach_data_io_flag(struct f2fs_io_info *fio)
>> {
>> ...
>> if ((1 << fio->temp) & meta_flag)
>> fio->op_flags |= REQ_META;
>> if ((1 << fio->temp) & fua_flag)
>> fio->op_flags |= REQ_FUA;
>> ...
>>
>> Thanks,
>>
>>> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
>>> ---
>>> fs/f2fs/data.c | 33 +++++++++++++++++++++------------
>>> 1 file changed, 21 insertions(+), 12 deletions(-)
>>>
>>> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
>>> index acc523f893ba..fcf0daa386de 100644
>>> --- a/fs/f2fs/data.c
>>> +++ b/fs/f2fs/data.c
>>> @@ -387,11 +387,23 @@ int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
>>> return 0;
>>> }
>>> -static void __attach_io_flag(struct f2fs_io_info *fio, unsigned int io_flag)
>>> +static unsigned int f2fs_io_flags(struct f2fs_io_info *fio)
>>> {
>>> unsigned int temp_mask = (1 << NR_TEMP_TYPE) - 1;
>>> - unsigned int fua_flag = io_flag & temp_mask;
>>> - unsigned int meta_flag = (io_flag >> NR_TEMP_TYPE) & temp_mask;
>>> + unsigned int fua_flag, meta_flag, io_flag;
>>> + unsigned int op_flags = 0;
>>> +
>>> + if (fio->op != REQ_OP_WRITE)
>>> + return 0;
>>> + if (fio->type == DATA)
>>> + io_flag = fio->sbi->data_io_flag;
>>> + else if (fio->type == NODE)
>>> + io_flag = fio->sbi->node_io_flag;
>>> + else
>>> + return 0;
>>> +
>>> + fua_flag = io_flag & temp_mask;
>>> + meta_flag = (io_flag >> NR_TEMP_TYPE) & temp_mask;
>>> /*
>>> * data/node io flag bits per temp:
>>> @@ -400,9 +412,10 @@ static void __attach_io_flag(struct f2fs_io_info *fio, unsigned int io_flag)
>>> * Cold | Warm | Hot | Cold | Warm | Hot |
>>> */
>>> if ((1 << fio->temp) & meta_flag)
>>> - fio->op_flags |= REQ_META;
>>> + op_flags |= REQ_META;
>>> if ((1 << fio->temp) & fua_flag)
>>> - fio->op_flags |= REQ_FUA;
>>> + op_flags |= REQ_FUA;
>>> + return op_flags;
>>> }
>>> static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
>>> @@ -412,14 +425,10 @@ static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
>>> sector_t sector;
>>> struct bio *bio;
>>> - if (fio->type == DATA)
>>> - __attach_io_flag(fio, sbi->data_io_flag);
>>> - else if (fio->type == NODE)
>>> - __attach_io_flag(fio, sbi->node_io_flag);
>>> -
>>> bdev = f2fs_target_device(sbi, fio->new_blkaddr, &sector);
>>> - bio = bio_alloc_bioset(bdev, npages, fio->op | fio->op_flags, GFP_NOIO,
>>> - &f2fs_bioset);
>>> + bio = bio_alloc_bioset(bdev, npages,
>>> + fio->op | fio->op_flags | f2fs_io_flags(fio),
>>> + GFP_NOIO, &f2fs_bioset);
>>> bio->bi_iter.bi_sector = sector;
>>> if (is_read_io(fio->op)) {
>>> bio->bi_end_io = f2fs_read_end_io;

\
 
 \ /
  Last update: 2022-04-20 04:45    [W:0.074 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site