On 2021/9/21 6:57, Jaegeuk Kim wrote:
On 09/12, Chao Yu wrote:
On 2021/9/11 7:13, Jaegeuk Kim wrote:
Wait. Why do we need to add so many options here? I was expecting to see
performance difference when getting random segments or random blocks as
an extreme case. I don't get the point why we nee
On 09/12, Chao Yu wrote:
> On 2021/9/11 7:13, Jaegeuk Kim wrote:
> > Wait. Why do we need to add so many options here? I was expecting to see
> > performance difference when getting random segments or random blocks as
> > an extreme case. I don't get the point why we need the middle of those
> > c
On 2021/9/11 7:13, Jaegeuk Kim wrote:
Wait. Why do we need to add so many options here? I was expecting to see
performance difference when getting random segments or random blocks as
an extreme case. I don't get the point why we need the middle of those cases.
I guess we can simply the aging te
On 2021/9/10 23:24, Daeho Jeong wrote:
On Fri, Sep 10, 2021 at 7:34 AM Daeho Jeong wrote:
On Thu, Sep 9, 2021 at 4:50 PM Chao Yu wrote:
On 2021/9/8 2:12, Daeho Jeong wrote:
On Fri, Sep 3, 2021 at 11:45 PM Chao Yu wrote:
On 2021/9/4 12:40, Daeho Jeong wrote:
As a per curseg field.
May
On 09/02, Daeho Jeong wrote:
> From: Daeho Jeong
>
> Added three options into "mode=" mount option to make it possible for
> developers to make the filesystem fragmented or simulate filesystem
> fragmentation/after-GC situation itself. The developers use these modes
> to understand filesystem fra
On Fri, Sep 10, 2021 at 7:34 AM Daeho Jeong wrote:
>
> On Thu, Sep 9, 2021 at 4:50 PM Chao Yu wrote:
> >
> > On 2021/9/8 2:12, Daeho Jeong wrote:
> > > On Fri, Sep 3, 2021 at 11:45 PM Chao Yu wrote:
> > >>
> > >> On 2021/9/4 12:40, Daeho Jeong wrote:
> > As a per curseg field.
> >
> >
On Thu, Sep 9, 2021 at 4:50 PM Chao Yu wrote:
>
> On 2021/9/8 2:12, Daeho Jeong wrote:
> > On Fri, Sep 3, 2021 at 11:45 PM Chao Yu wrote:
> >>
> >> On 2021/9/4 12:40, Daeho Jeong wrote:
> As a per curseg field.
>
> > Maybe, we run into the same race condition issue you told before f
On 2021/9/8 2:12, Daeho Jeong wrote:
On Fri, Sep 3, 2021 at 11:45 PM Chao Yu wrote:
On 2021/9/4 12:40, Daeho Jeong wrote:
As a per curseg field.
Maybe, we run into the same race condition issue you told before for
fragment_remained_chunk.
Could you clarify this more?
e.g.
F2FS_OPTION(sbi
On Fri, Sep 3, 2021 at 11:45 PM Chao Yu wrote:
>
> On 2021/9/4 12:40, Daeho Jeong wrote:
> >> As a per curseg field.
> >>
> >>> Maybe, we run into the same race condition issue you told before for
> >>> fragment_remained_chunk.
> >>> Could you clarify this more?
> >>
> >> e.g.
> >>
> >> F2FS_OPTIO
On 2021/9/4 12:40, Daeho Jeong wrote:
As a per curseg field.
Maybe, we run into the same race condition issue you told before for
fragment_remained_chunk.
Could you clarify this more?
e.g.
F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_FIXED_BLK
fragment_chunk_size = 384
fragment_hole_size = 38
> As a per curseg field.
>
> > Maybe, we run into the same race condition issue you told before for
> > fragment_remained_chunk.
> > Could you clarify this more?
>
> e.g.
>
> F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_FIXED_BLK
> fragment_chunk_size = 384
> fragment_hole_size = 384
>
> When creati
On 2021/9/4 4:33, Daeho Jeong wrote:
if (f2fs_need_seq_seg(sbi))
return 0;
static inline bool f2fs_need_seq_seg(struct f2fs_sb_info *sbi)
{
return F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_FIXED_BLK;
}
Do you need this in select_policy(), either?
IMO, f
> if (f2fs_need_seq_seg(sbi))
> return 0;
>
> static inline bool f2fs_need_seq_seg(struct f2fs_sb_info *sbi)
> {
> return F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_FIXED_BLK;
> }
>
Do you need this in select_policy(), either?
Like,
if (f2fs_need_rand_seg(
On 2021/9/3 1:24, Daeho Jeong wrote:
@@ -2630,6 +2631,8 @@ static unsigned int __get_next_segno(struct f2fs_sb_info
*sbi, int type)
unsigned short seg_type = curseg->seg_type;
sanity_check_seg_type(sbi, seg_type);
+ if (f2fs_need_rand_seg(sbi))
+ return prandom
From: Daeho Jeong
Added three options into "mode=" mount option to make it possible for
developers to make the filesystem fragmented or simulate filesystem
fragmentation/after-GC situation itself. The developers use these modes
to understand filesystem fragmentation/after-GC condition well,
and e
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