* [PATCH] Remove an unnecessary line in allocate_data_block.
@ 2014-07-27 23:03 Dongho Sim
2014-07-28 5:35 ` Chao Yu
0 siblings, 1 reply; 8+ messages in thread
From: Dongho Sim @ 2014-07-27 23:03 UTC (permalink / raw)
To: jaegeuk, linux-f2fs-devel
Hi. There was an unnecessary line in function, allocate_data_block.
It is already done in
refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
Thanks.
Signed-off-by: Dongho Sim <dh.sim@samsung.com>
---
fs/f2fs/segment.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 8a6e57d..a3c7aae 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1001,7 +1001,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
* since SSR needs latest valid block information.
*/
refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
- locate_dirty_segment(sbi, old_cursegno);
mutex_unlock(&sit_i->sentry_lock);
--
1.9.1
------------------------------------------------------------------------------
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^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH] Remove an unnecessary line in allocate_data_block.
2014-07-27 23:03 [PATCH] Remove an unnecessary line in allocate_data_block Dongho Sim
@ 2014-07-28 5:35 ` Chao Yu
0 siblings, 0 replies; 8+ messages in thread
From: Chao Yu @ 2014-07-28 5:35 UTC (permalink / raw)
To: dh.sim; +Cc: jaegeuk, linux-f2fs-devel
Hi Dongho,
> -----Original Message-----
> From: Dongho Sim [mailto:dh.sim@samsung.com]
> Sent: Monday, July 28, 2014 7:03 AM
> To: jaegeuk@kernel.org; linux-f2fs-devel@lists.sourceforge.net
> Subject: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
>
> Hi. There was an unnecessary line in function, allocate_data_block.
> It is already done in
> refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
>
> Thanks.
Agreed,
How about removing old_cursegno too as it's no longer used in allocate_data_block?
Thanks,
Yu
>
> Signed-off-by: Dongho Sim <dh.sim@samsung.com>
> ---
> fs/f2fs/segment.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index 8a6e57d..a3c7aae 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -1001,7 +1001,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> * since SSR needs latest valid block information.
> */
> refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> - locate_dirty_segment(sbi, old_cursegno);
>
> mutex_unlock(&sit_i->sentry_lock);
>
> --
> 1.9.1
> ------------------------------------------------------------------------------
> Want fast and easy access to all the code in your enterprise? Index and
> search up to 200,000 lines of code with a free copy of Black Duck
> Code Sight - the same software that powers the world's largest code
> search on Ohloh, the Black Duck Open Hub! Try it now.
> http://p.sf.net/sfu/bds
> _______________________________________________
> Linux-f2fs-devel mailing list
> Linux-f2fs-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
------------------------------------------------------------------------------
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] Remove an unnecessary line in allocate_data_block.
@ 2014-07-28 5:51 Dongho Sim
0 siblings, 0 replies; 8+ messages in thread
From: Dongho Sim @ 2014-07-28 5:51 UTC (permalink / raw)
To: 俞超
Cc: jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net
Yes, there was another one.
Thanks Chao, :-)
Signed-off-by: Dongho Sim <dh.sim@samsung.com>
---
fs/f2fs/segment.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 8a6e57d..3ab7749 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -980,7 +980,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
mutex_lock(&curseg->curseg_mutex);
*new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
- old_cursegno = curseg->segno;
/*
* __add_sum_entry should be resided under the curseg_mutex
@@ -1001,7 +1000,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
* since SSR needs latest valid block information.
*/
refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
- locate_dirty_segment(sbi, old_cursegno);
mutex_unlock(&sit_i->sentry_lock);
--
1.9.1
------- Original Message -------
Sender : 俞超<chao2.yu@samsung.com> 工程师/SRC-Nanjing-Mobile Solution Lab/삼성전자
Date : 2014-07-28 14:35 (GMT+09:00)
Title : RE: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
Hi Dongho,
> -----Original Message-----
> From: Dongho Sim [mailto:dh.sim@samsung.com]
> Sent: Monday, July 28, 2014 7:03 AM
> To: jaegeuk@kernel.org; linux-f2fs-devel@lists.sourceforge.net
> Subject: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
>
> Hi. There was an unnecessary line in function, allocate_data_block.
> It is already done in
> refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
>
> Thanks.
Agreed,
How about removing old_cursegno too as it's no longer used in allocate_data_block?
Thanks,
Yu
>
> Signed-off-by: Dongho Sim
> ---
> fs/f2fs/segment.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index 8a6e57d..a3c7aae 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -1001,7 +1001,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> * since SSR needs latest valid block information.
> */
> refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> - locate_dirty_segment(sbi, old_cursegno);
>
> mutex_unlock(&sit_i->sentry_lock);
>
> --
> 1.9.1
> ------------------------------------------------------------------------------
> Want fast and easy access to all the code in your enterprise? Index and
> search up to 200,000 lines of code with a free copy of Black Duck
> Code Sight - the same software that powers the world's largest code
> search on Ohloh, the Black Duck Open Hub! Try it now.
> http://p.sf.net/sfu/bds
> _______________________________________________
> Linux-f2fs-devel mailing list
> Linux-f2fs-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
------------------------------------------------------------------------------
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Build a bridge from your legacy apps to the future.
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_______________________________________________
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https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH] Remove an unnecessary line in allocate_data_block.
@ 2014-07-28 7:21 Chao Yu
0 siblings, 0 replies; 8+ messages in thread
From: Chao Yu @ 2014-07-28 7:21 UTC (permalink / raw)
To: dh.sim; +Cc: jaegeuk, linux-f2fs-devel
Hi Dongho,
> ----- Original Message -----
>
> From： "Dongho Sim" <dh.sim@samsung.com>
> Sent： Monday, July 28, 2014 1:51 PM
> To： "Chao Yu" <chao2.yu@samsung.com>
> Cc： jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net
> Subject： Re: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
>
> Yes, there was another one.
> Thanks Chao, :-)
>
> Signed-off-by: Dongho Sim <dh.sim@samsung.com>
> ---
> fs/f2fs/segment.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index 8a6e57d..3ab7749 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -980,7 +980,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> mutex_lock(&curseg->curseg_mutex);
>
> *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
> - old_cursegno = curseg->segno;
The definition of old_cursegno also should be removed.
Thanks,
Yu
>
> /*
> * __add_sum_entry should be resided under the curseg_mutex
> @@ -1001,7 +1000,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> * since SSR needs latest valid block information.
> */
> refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> - locate_dirty_segment(sbi, old_cursegno);
>
> mutex_unlock(&sit_i->sentry_lock);
>
> --
> 1.9.1
>
> ------- Original Message -------
> Sender : Chao Yu <chao2.yu@samsung.com>
> Date : 2014-07-28 14:35 (GMT+09:00)
> Title : RE: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
>
> Hi Dongho,
>
> > -----Original Message-----
> > From: Dongho Sim [mailto:dh.sim@samsung.com]
> > Sent: Monday, July 28, 2014 7:03 AM
> > To: jaegeuk@kernel.org; linux-f2fs-devel@lists.sourceforge.net
> > Subject: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
> >
> > Hi. There was an unnecessary line in function, allocate_data_block.
> > It is already done in
> > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> >
> > Thanks.
>
> Agreed,
> How about removing old_cursegno too as it's no longer used in allocate_data_block?
>
> Thanks,
> Yu
>
> >
> > Signed-off-by: Dongho Sim
> > ---
> > fs/f2fs/segment.c | 1 -
> > 1 file changed, 1 deletion(-)
> >
> > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> > index 8a6e57d..a3c7aae 100644
> > --- a/fs/f2fs/segment.c
> > +++ b/fs/f2fs/segment.c
> > @@ -1001,7 +1001,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > * since SSR needs latest valid block information.
> > */
> > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> > - locate_dirty_segment(sbi, old_cursegno);
> >
> > mutex_unlock(&sit_i->sentry_lock);
> >
> > --
> > 1.9.1
> > ------------------------------------------------------------------------------
> > Want fast and easy access to all the code in your enterprise? Index and
> > search up to 200,000 lines of code with a free copy of Black Duck
> > Code Sight - the same software that powers the world's largest code
> > search on Ohloh, the Black Duck Open Hub! Try it now.
> > http://p.sf.net/sfu/bds
> > _______________________________________________
> > Linux-f2fs-devel mailing list
> > Linux-f2fs-devel@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
> ------------------------------------------------------------------------------
> Infragistics Professional
> Build stunning WinForms apps today!
> Reboot your WinForms applications with our WinForms controls.
> Build a bridge from your legacy apps to the future.
> http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk
> _______________________________________________
> Linux-f2fs-devel mailing list
> Linux-f2fs-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
------------------------------------------------------------------------------
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Build stunning WinForms apps today!
Reboot your WinForms applications with our WinForms controls.
Build a bridge from your legacy apps to the future.
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_______________________________________________
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https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] Remove an unnecessary line in allocate_data_block.
@ 2014-07-28 8:34 Dongho Sim
2014-07-29 13:24 ` Jaegeuk Kim
0 siblings, 1 reply; 8+ messages in thread
From: Dongho Sim @ 2014-07-28 8:34 UTC (permalink / raw)
To: ?超; +Cc: jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net
Hi, Chao.
It's my mistake.
Thanks :-)
Signed-off-by: Dongho Sim <dh.sim@samsung.com>
---
fs/f2fs/segment.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 8a6e57d..7af4a8d 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -973,14 +973,12 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
{
struct sit_info *sit_i = SIT_I(sbi);
struct curseg_info *curseg;
- unsigned int old_cursegno;
curseg = CURSEG_I(sbi, type);
mutex_lock(&curseg->curseg_mutex);
*new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
- old_cursegno = curseg->segno;
/*
* __add_sum_entry should be resided under the curseg_mutex
@@ -1001,7 +999,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
* since SSR needs latest valid block information.
*/
refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
- locate_dirty_segment(sbi, old_cursegno);
mutex_unlock(&sit_i->sentry_lock);
--
1.9.1
------- Original Message -------
Sender : ?超<chao2.yu@samsung.com> 工程?/SRC-Nanjing-Mobile Solution Lab/삼성전자
Date : 2014-07-28 16:21 (GMT+09:00)
Title : Re: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
Hi Dongho,
> ----- Original Message -----
>
> From： "Dongho Sim"
> Sent： Monday, July 28, 2014 1:51 PM
> To： "Chao Yu"
> Cc： jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net
> Subject： Re: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
>
> Yes, there was another one.
> Thanks Chao, :-)
>
> Signed-off-by: Dongho Sim
> ---
> fs/f2fs/segment.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index 8a6e57d..3ab7749 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -980,7 +980,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> mutex_lock(&curseg->curseg_mutex);
>
> *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
> - old_cursegno = curseg->segno;
The definition of old_cursegno also should be removed.
Thanks,
Yu
>
> /*
> * __add_sum_entry should be resided under the curseg_mutex
> @@ -1001,7 +1000,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> * since SSR needs latest valid block information.
> */
> refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> - locate_dirty_segment(sbi, old_cursegno);
>
> mutex_unlock(&sit_i->sentry_lock);
>
> --
> 1.9.1
>
> ------- Original Message -------
> Sender : Chao Yu
> Date : 2014-07-28 14:35 (GMT+09:00)
> Title : RE: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
>
> Hi Dongho,
>
> > -----Original Message-----
> > From: Dongho Sim [mailto:dh.sim@samsung.com]
> > Sent: Monday, July 28, 2014 7:03 AM
> > To: jaegeuk@kernel.org; linux-f2fs-devel@lists.sourceforge.net
> > Subject: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
> >
> > Hi. There was an unnecessary line in function, allocate_data_block.
> > It is already done in
> > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> >
> > Thanks.
>
> Agreed,
> How about removing old_cursegno too as it's no longer used in allocate_data_block?
>
> Thanks,
> Yu
>
> >
> > Signed-off-by: Dongho Sim
> > ---
> > fs/f2fs/segment.c | 1 -
> > 1 file changed, 1 deletion(-)
> >
> > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> > index 8a6e57d..a3c7aae 100644
> > --- a/fs/f2fs/segment.c
> > +++ b/fs/f2fs/segment.c
> > @@ -1001,7 +1001,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > * since SSR needs latest valid block information.
> > */
> > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> > - locate_dirty_segment(sbi, old_cursegno);
> >
> > mutex_unlock(&sit_i->sentry_lock);
> >
> > --
> > 1.9.1
> > ------------------------------------------------------------------------------
> > Want fast and easy access to all the code in your enterprise? Index and
> > search up to 200,000 lines of code with a free copy of Black Duck
> > Code Sight - the same software that powers the world's largest code
> > search on Ohloh, the Black Duck Open Hub! Try it now.
> > http://p.sf.net/sfu/bds
> > _______________________________________________
> > Linux-f2fs-devel mailing list
> > Linux-f2fs-devel@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
> ------------------------------------------------------------------------------
> Infragistics Professional
> Build stunning WinForms apps today!
> Reboot your WinForms applications with our WinForms controls.
> Build a bridge from your legacy apps to the future.
> http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk
> _______________________________________________
> Linux-f2fs-devel mailing list
> Linux-f2fs-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
------------------------------------------------------------------------------
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Build a bridge from your legacy apps to the future.
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https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply related [flat|nested] 8+ messages in thread* Re: [PATCH] Remove an unnecessary line in allocate_data_block.
2014-07-28 8:34 Dongho Sim
@ 2014-07-29 13:24 ` Jaegeuk Kim
2014-07-30 0:24 ` Changman Lee
0 siblings, 1 reply; 8+ messages in thread
From: Jaegeuk Kim @ 2014-07-29 13:24 UTC (permalink / raw)
To: Dongho Sim; +Cc: linux-f2fs-devel@lists.sourceforge.net
Hi Dongho,
At first, please write a patch under the correct rule.
(e.g., description)
About this change, it's negative.
When considering SSR, we need to take care of the following scenario.
- old segno : X
- new address : Z
- old curseg : Y
This means, a new block is supposed to be written to Z from X.
And Z is newly allocated in the same path from Y.
In that case, we should trigger locate_dirty_segment for Y, since
it was a current_segment and can be dirty owing to SSR.
But that was not included in the dirty list.
Thanks,
On Mon, Jul 28, 2014 at 08:34:25AM +0000, Dongho Sim wrote:
> Hi, Chao.
> It's my mistake.
>
> Thanks :-)
>
> Signed-off-by: Dongho Sim <dh.sim@samsung.com>
> ---
> fs/f2fs/segment.c | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index 8a6e57d..7af4a8d 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -973,14 +973,12 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> {
> struct sit_info *sit_i = SIT_I(sbi);
> struct curseg_info *curseg;
> - unsigned int old_cursegno;
>
> curseg = CURSEG_I(sbi, type);
>
> mutex_lock(&curseg->curseg_mutex);
>
> *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
> - old_cursegno = curseg->segno;
>
> /*
> * __add_sum_entry should be resided under the curseg_mutex
> @@ -1001,7 +999,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> * since SSR needs latest valid block information.
> */
> refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> - locate_dirty_segment(sbi, old_cursegno);
>
> mutex_unlock(&sit_i->sentry_lock);
>
> --
> 1.9.1
>
> ------- Original Message -------
> Sender : ?超<chao2.yu@samsung.com> 工程?/SRC-Nanjing-Mobile Solution Lab/삼성전자
> Date : 2014-07-28 16:21 (GMT+09:00)
> Title : Re: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
>
> Hi Dongho,
>
> > ----- Original Message -----
> >
> > From： "Dongho Sim"
> > Sent： Monday, July 28, 2014 1:51 PM
> > To： "Chao Yu"
> > Cc： jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net
> > Subject： Re: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
> >
> > Yes, there was another one.
> > Thanks Chao, :-)
> >
> > Signed-off-by: Dongho Sim
> > ---
> > fs/f2fs/segment.c | 2 --
> > 1 file changed, 2 deletions(-)
> >
> > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> > index 8a6e57d..3ab7749 100644
> > --- a/fs/f2fs/segment.c
> > +++ b/fs/f2fs/segment.c
> > @@ -980,7 +980,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > mutex_lock(&curseg->curseg_mutex);
> >
> > *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
> > - old_cursegno = curseg->segno;
>
> The definition of old_cursegno also should be removed.
>
> Thanks,
> Yu
>
> >
> > /*
> > * __add_sum_entry should be resided under the curseg_mutex
> > @@ -1001,7 +1000,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > * since SSR needs latest valid block information.
> > */
> > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> > - locate_dirty_segment(sbi, old_cursegno);
> >
> > mutex_unlock(&sit_i->sentry_lock);
> >
> > --
> > 1.9.1
> >
> > ------- Original Message -------
> > Sender : Chao Yu
> > Date : 2014-07-28 14:35 (GMT+09:00)
> > Title : RE: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
> >
> > Hi Dongho,
> >
> > > -----Original Message-----
> > > From: Dongho Sim [mailto:dh.sim@samsung.com]
> > > Sent: Monday, July 28, 2014 7:03 AM
> > > To: jaegeuk@kernel.org; linux-f2fs-devel@lists.sourceforge.net
> > > Subject: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
> > >
> > > Hi. There was an unnecessary line in function, allocate_data_block.
> > > It is already done in
> > > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> > >
> > > Thanks.
> >
> > Agreed,
> > How about removing old_cursegno too as it's no longer used in allocate_data_block?
> >
> > Thanks,
> > Yu
> >
> > >
> > > Signed-off-by: Dongho Sim
> > > ---
> > > fs/f2fs/segment.c | 1 -
> > > 1 file changed, 1 deletion(-)
> > >
> > > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> > > index 8a6e57d..a3c7aae 100644
> > > --- a/fs/f2fs/segment.c
> > > +++ b/fs/f2fs/segment.c
> > > @@ -1001,7 +1001,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > > * since SSR needs latest valid block information.
> > > */
> > > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> > > - locate_dirty_segment(sbi, old_cursegno);
> > >
> > > mutex_unlock(&sit_i->sentry_lock);
> > >
> > > --
> > > 1.9.1
> > > ------------------------------------------------------------------------------
> > > Want fast and easy access to all the code in your enterprise? Index and
> > > search up to 200,000 lines of code with a free copy of Black Duck
> > > Code Sight - the same software that powers the world's largest code
> > > search on Ohloh, the Black Duck Open Hub! Try it now.
> > > http://p.sf.net/sfu/bds
> > > _______________________________________________
> > > Linux-f2fs-devel mailing list
> > > Linux-f2fs-devel@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
> > ------------------------------------------------------------------------------
> > Infragistics Professional
> > Build stunning WinForms apps today!
> > Reboot your WinForms applications with our WinForms controls.
> > Build a bridge from your legacy apps to the future.
> > http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk
> > _______________________________________________
> > Linux-f2fs-devel mailing list
> > Linux-f2fs-devel@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
------------------------------------------------------------------------------
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^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH] Remove an unnecessary line in allocate_data_block.
2014-07-29 13:24 ` Jaegeuk Kim
@ 2014-07-30 0:24 ` Changman Lee
2014-07-30 1:23 ` Jaegeuk Kim
0 siblings, 1 reply; 8+ messages in thread
From: Changman Lee @ 2014-07-30 0:24 UTC (permalink / raw)
To: Jaegeuk Kim; +Cc: linux-f2fs-devel@lists.sourceforge.net
On Tue, Jul 29, 2014 at 06:24:48AM -0700, Jaegeuk Kim wrote:
> Hi Dongho,
>
> At first, please write a patch under the correct rule.
> (e.g., description)
>
> About this change, it's negative.
> When considering SSR, we need to take care of the following scenario.
> - old segno : X
> - new address : Z
> - old curseg : Y
> This means, a new block is supposed to be written to Z from X.
> And Z is newly allocated in the same path from Y.
>
> In that case, we should trigger locate_dirty_segment for Y, since
> it was a current_segment and can be dirty owing to SSR.
> But that was not included in the dirty list.
>
> Thanks,
>
We already choosed old curseg(Y) and then we allocate new address(Z) from old
curseg(Y). After that we call refresh_sit_entry(old address, new address).
In the funcation, we call locate_dirty_segment with old seg and old curseg.
So calling locate_dirty_segment after refresh_sit_entry again is redundant.
Thanks,
> On Mon, Jul 28, 2014 at 08:34:25AM +0000, Dongho Sim wrote:
> > Hi, Chao.
> > It's my mistake.
> >
> > Thanks :-)
> >
> > Signed-off-by: Dongho Sim <dh.sim@samsung.com>
> > ---
> > fs/f2fs/segment.c | 3 ---
> > 1 file changed, 3 deletions(-)
> >
> > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> > index 8a6e57d..7af4a8d 100644
> > --- a/fs/f2fs/segment.c
> > +++ b/fs/f2fs/segment.c
> > @@ -973,14 +973,12 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > {
> > struct sit_info *sit_i = SIT_I(sbi);
> > struct curseg_info *curseg;
> > - unsigned int old_cursegno;
> >
> > curseg = CURSEG_I(sbi, type);
> >
> > mutex_lock(&curseg->curseg_mutex);
> >
> > *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
> > - old_cursegno = curseg->segno;
> >
> > /*
> > * __add_sum_entry should be resided under the curseg_mutex
> > @@ -1001,7 +999,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > * since SSR needs latest valid block information.
> > */
> > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> > - locate_dirty_segment(sbi, old_cursegno);
> >
> > mutex_unlock(&sit_i->sentry_lock);
> >
> > --
> > 1.9.1
> >
> > ------- Original Message -------
> > Sender : ?超<chao2.yu@samsung.com> 工程?/SRC-Nanjing-Mobile Solution Lab/삼성전자
> > Date : 2014-07-28 16:21 (GMT+09:00)
> > Title : Re: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
> >
> > Hi Dongho,
> >
> > > ----- Original Message -----
> > >
> > > From： "Dongho Sim"
> > > Sent： Monday, July 28, 2014 1:51 PM
> > > To： "Chao Yu"
> > > Cc： jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net
> > > Subject： Re: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
> > >
> > > Yes, there was another one.
> > > Thanks Chao, :-)
> > >
> > > Signed-off-by: Dongho Sim
> > > ---
> > > fs/f2fs/segment.c | 2 --
> > > 1 file changed, 2 deletions(-)
> > >
> > > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> > > index 8a6e57d..3ab7749 100644
> > > --- a/fs/f2fs/segment.c
> > > +++ b/fs/f2fs/segment.c
> > > @@ -980,7 +980,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > > mutex_lock(&curseg->curseg_mutex);
> > >
> > > *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
> > > - old_cursegno = curseg->segno;
> >
> > The definition of old_cursegno also should be removed.
> >
> > Thanks,
> > Yu
> >
> > >
> > > /*
> > > * __add_sum_entry should be resided under the curseg_mutex
> > > @@ -1001,7 +1000,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > > * since SSR needs latest valid block information.
> > > */
> > > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> > > - locate_dirty_segment(sbi, old_cursegno);
> > >
> > > mutex_unlock(&sit_i->sentry_lock);
> > >
> > > --
> > > 1.9.1
> > >
> > > ------- Original Message -------
> > > Sender : Chao Yu
> > > Date : 2014-07-28 14:35 (GMT+09:00)
> > > Title : RE: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
> > >
> > > Hi Dongho,
> > >
> > > > -----Original Message-----
> > > > From: Dongho Sim [mailto:dh.sim@samsung.com]
> > > > Sent: Monday, July 28, 2014 7:03 AM
> > > > To: jaegeuk@kernel.org; linux-f2fs-devel@lists.sourceforge.net
> > > > Subject: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
> > > >
> > > > Hi. There was an unnecessary line in function, allocate_data_block.
> > > > It is already done in
> > > > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> > > >
> > > > Thanks.
> > >
> > > Agreed,
> > > How about removing old_cursegno too as it's no longer used in allocate_data_block?
> > >
> > > Thanks,
> > > Yu
> > >
> > > >
> > > > Signed-off-by: Dongho Sim
> > > > ---
> > > > fs/f2fs/segment.c | 1 -
> > > > 1 file changed, 1 deletion(-)
> > > >
> > > > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> > > > index 8a6e57d..a3c7aae 100644
> > > > --- a/fs/f2fs/segment.c
> > > > +++ b/fs/f2fs/segment.c
> > > > @@ -1001,7 +1001,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > > > * since SSR needs latest valid block information.
> > > > */
> > > > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> > > > - locate_dirty_segment(sbi, old_cursegno);
> > > >
> > > > mutex_unlock(&sit_i->sentry_lock);
> > > >
> > > > --
> > > > 1.9.1
> > > > ------------------------------------------------------------------------------
> > > > Want fast and easy access to all the code in your enterprise? Index and
> > > > search up to 200,000 lines of code with a free copy of Black Duck
> > > > Code Sight - the same software that powers the world's largest code
> > > > search on Ohloh, the Black Duck Open Hub! Try it now.
> > > > http://p.sf.net/sfu/bds
> > > > _______________________________________________
> > > > Linux-f2fs-devel mailing list
> > > > Linux-f2fs-devel@lists.sourceforge.net
> > > > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
> > > ------------------------------------------------------------------------------
> > > Infragistics Professional
> > > Build stunning WinForms apps today!
> > > Reboot your WinForms applications with our WinForms controls.
> > > Build a bridge from your legacy apps to the future.
> > > http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk
> > > _______________________________________________
> > > Linux-f2fs-devel mailing list
> > > Linux-f2fs-devel@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
>
> ------------------------------------------------------------------------------
> Infragistics Professional
> Build stunning WinForms apps today!
> Reboot your WinForms applications with our WinForms controls.
> Build a bridge from your legacy apps to the future.
> http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk
> _______________________________________________
> Linux-f2fs-devel mailing list
> Linux-f2fs-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
------------------------------------------------------------------------------
Infragistics Professional
Build stunning WinForms apps today!
Reboot your WinForms applications with our WinForms controls.
Build a bridge from your legacy apps to the future.
http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH] Remove an unnecessary line in allocate_data_block.
2014-07-30 0:24 ` Changman Lee
@ 2014-07-30 1:23 ` Jaegeuk Kim
0 siblings, 0 replies; 8+ messages in thread
From: Jaegeuk Kim @ 2014-07-30 1:23 UTC (permalink / raw)
To: Changman Lee; +Cc: linux-f2fs-devel@lists.sourceforge.net
On Wed, Jul 30, 2014 at 09:24:50AM +0900, Changman Lee wrote:
> On Tue, Jul 29, 2014 at 06:24:48AM -0700, Jaegeuk Kim wrote:
> > Hi Dongho,
> >
> > At first, please write a patch under the correct rule.
> > (e.g., description)
> >
> > About this change, it's negative.
> > When considering SSR, we need to take care of the following scenario.
> > - old segno : X
> > - new address : Z
> > - old curseg : Y
> > This means, a new block is supposed to be written to Z from X.
> > And Z is newly allocated in the same path from Y.
> >
> > In that case, we should trigger locate_dirty_segment for Y, since
> > it was a current_segment and can be dirty owing to SSR.
> > But that was not included in the dirty list.
> >
> > Thanks,
> >
>
> We already choosed old curseg(Y) and then we allocate new address(Z) from old
> curseg(Y). After that we call refresh_sit_entry(old address, new address).
> In the funcation, we call locate_dirty_segment with old seg and old curseg.
> So calling locate_dirty_segment after refresh_sit_entry again is redundant.
Aha, the new address is always allocated from old_curseg.
That's right. :)
Dongho,
Please, write a patch including this discussion and post v2.
Thanks,
>
> Thanks,
>
> > On Mon, Jul 28, 2014 at 08:34:25AM +0000, Dongho Sim wrote:
> > > Hi, Chao.
> > > It's my mistake.
> > >
> > > Thanks :-)
> > >
> > > Signed-off-by: Dongho Sim <dh.sim@samsung.com>
> > > ---
> > > fs/f2fs/segment.c | 3 ---
> > > 1 file changed, 3 deletions(-)
> > >
> > > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> > > index 8a6e57d..7af4a8d 100644
> > > --- a/fs/f2fs/segment.c
> > > +++ b/fs/f2fs/segment.c
> > > @@ -973,14 +973,12 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > > {
> > > struct sit_info *sit_i = SIT_I(sbi);
> > > struct curseg_info *curseg;
> > > - unsigned int old_cursegno;
> > >
> > > curseg = CURSEG_I(sbi, type);
> > >
> > > mutex_lock(&curseg->curseg_mutex);
> > >
> > > *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
> > > - old_cursegno = curseg->segno;
> > >
> > > /*
> > > * __add_sum_entry should be resided under the curseg_mutex
> > > @@ -1001,7 +999,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > > * since SSR needs latest valid block information.
> > > */
> > > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> > > - locate_dirty_segment(sbi, old_cursegno);
> > >
> > > mutex_unlock(&sit_i->sentry_lock);
> > >
> > > --
> > > 1.9.1
> > >
> > > ------- Original Message -------
> > > Sender : ?超<chao2.yu@samsung.com> 工程?/SRC-Nanjing-Mobile Solution Lab/삼성전자
> > > Date : 2014-07-28 16:21 (GMT+09:00)
> > > Title : Re: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
> > >
> > > Hi Dongho,
> > >
> > > > ----- Original Message -----
> > > >
> > > > From： "Dongho Sim"
> > > > Sent： Monday, July 28, 2014 1:51 PM
> > > > To： "Chao Yu"
> > > > Cc： jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net
> > > > Subject： Re: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
> > > >
> > > > Yes, there was another one.
> > > > Thanks Chao, :-)
> > > >
> > > > Signed-off-by: Dongho Sim
> > > > ---
> > > > fs/f2fs/segment.c | 2 --
> > > > 1 file changed, 2 deletions(-)
> > > >
> > > > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> > > > index 8a6e57d..3ab7749 100644
> > > > --- a/fs/f2fs/segment.c
> > > > +++ b/fs/f2fs/segment.c
> > > > @@ -980,7 +980,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > > > mutex_lock(&curseg->curseg_mutex);
> > > >
> > > > *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
> > > > - old_cursegno = curseg->segno;
> > >
> > > The definition of old_cursegno also should be removed.
> > >
> > > Thanks,
> > > Yu
> > >
> > > >
> > > > /*
> > > > * __add_sum_entry should be resided under the curseg_mutex
> > > > @@ -1001,7 +1000,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > > > * since SSR needs latest valid block information.
> > > > */
> > > > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> > > > - locate_dirty_segment(sbi, old_cursegno);
> > > >
> > > > mutex_unlock(&sit_i->sentry_lock);
> > > >
> > > > --
> > > > 1.9.1
> > > >
> > > > ------- Original Message -------
> > > > Sender : Chao Yu
> > > > Date : 2014-07-28 14:35 (GMT+09:00)
> > > > Title : RE: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
> > > >
> > > > Hi Dongho,
> > > >
> > > > > -----Original Message-----
> > > > > From: Dongho Sim [mailto:dh.sim@samsung.com]
> > > > > Sent: Monday, July 28, 2014 7:03 AM
> > > > > To: jaegeuk@kernel.org; linux-f2fs-devel@lists.sourceforge.net
> > > > > Subject: [f2fs-dev] [PATCH] Remove an unnecessary line in allocate_data_block.
> > > > >
> > > > > Hi. There was an unnecessary line in function, allocate_data_block.
> > > > > It is already done in
> > > > > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> > > > >
> > > > > Thanks.
> > > >
> > > > Agreed,
> > > > How about removing old_cursegno too as it's no longer used in allocate_data_block?
> > > >
> > > > Thanks,
> > > > Yu
> > > >
> > > > >
> > > > > Signed-off-by: Dongho Sim
> > > > > ---
> > > > > fs/f2fs/segment.c | 1 -
> > > > > 1 file changed, 1 deletion(-)
> > > > >
> > > > > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> > > > > index 8a6e57d..a3c7aae 100644
> > > > > --- a/fs/f2fs/segment.c
> > > > > +++ b/fs/f2fs/segment.c
> > > > > @@ -1001,7 +1001,6 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > > > > * since SSR needs latest valid block information.
> > > > > */
> > > > > refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
> > > > > - locate_dirty_segment(sbi, old_cursegno);
> > > > >
> > > > > mutex_unlock(&sit_i->sentry_lock);
> > > > >
> > > > > --
> > > > > 1.9.1
> > > > > ------------------------------------------------------------------------------
> > > > > Want fast and easy access to all the code in your enterprise? Index and
> > > > > search up to 200,000 lines of code with a free copy of Black Duck
> > > > > Code Sight - the same software that powers the world's largest code
> > > > > search on Ohloh, the Black Duck Open Hub! Try it now.
> > > > > http://p.sf.net/sfu/bds
> > > > > _______________________________________________
> > > > > Linux-f2fs-devel mailing list
> > > > > Linux-f2fs-devel@lists.sourceforge.net
> > > > > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
> > > > ------------------------------------------------------------------------------
> > > > Infragistics Professional
> > > > Build stunning WinForms apps today!
> > > > Reboot your WinForms applications with our WinForms controls.
> > > > Build a bridge from your legacy apps to the future.
> > > > http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk
> > > > _______________________________________________
> > > > Linux-f2fs-devel mailing list
> > > > Linux-f2fs-devel@lists.sourceforge.net
> > > > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
> >
> > ------------------------------------------------------------------------------
> > Infragistics Professional
> > Build stunning WinForms apps today!
> > Reboot your WinForms applications with our WinForms controls.
> > Build a bridge from your legacy apps to the future.
> > http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk
> > _______________________________________________
> > Linux-f2fs-devel mailing list
> > Linux-f2fs-devel@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
------------------------------------------------------------------------------
Infragistics Professional
Build stunning WinForms apps today!
Reboot your WinForms applications with our WinForms controls.
Build a bridge from your legacy apps to the future.
http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk
_______________________________________________
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https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2014-07-30 1:23 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2014-07-27 23:03 [PATCH] Remove an unnecessary line in allocate_data_block Dongho Sim
2014-07-28 5:35 ` Chao Yu
-- strict thread matches above, loose matches on Subject: below --
2014-07-28 5:51 Dongho Sim
2014-07-28 7:21 Chao Yu
2014-07-28 8:34 Dongho Sim
2014-07-29 13:24 ` Jaegeuk Kim
2014-07-30 0:24 ` Changman Lee
2014-07-30 1:23 ` Jaegeuk Kim
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