Hi Sergey,
On Thu, Dec 27, 2018 at 11:26:24AM +0900, Sergey Senozhatsky wrote:
> On (12/24/18 12:35), Minchan Kim wrote:
> [..]
> > @@ -645,10 +680,13 @@ static ssize_t writeback_store(struct device *dev,
> > bvec.bv_len = PAGE_SIZE;
> >
ck idle/huge writeback mode check
The mode in writeback_store is not bit opeartion any more so no need
to use bit operations. Furthermore, current condition check is broken
in that it does writeback every pages regardless of huge/idle.
3. clean up idle_store
No need to use goto.
Suggested-by: John
On Mon, Dec 03, 2018 at 11:30:40AM +0900, Sergey Senozhatsky wrote:
> On (12/03/18 08:18), Minchan Kim wrote:
> >
> > Per andrew's comment:
> > https://lkml.org/lkml/2018/11/27/156
> >
> > I need to fix it to represent 4K always.
>
> Aha.
>
> Th
On Mon, Dec 03, 2018 at 11:30:40AM +0900, Sergey Senozhatsky wrote:
> On (12/03/18 08:18), Minchan Kim wrote:
> >
> > Per andrew's comment:
> > https://lkml.org/lkml/2018/11/27/156
> >
> > I need to fix it to represent 4K always.
>
> Aha.
>
> Th
/zram0/writeback_limit
The writeback_limit count will reset whenever you reset zram(e.g.,
system reboot, echo 1 > /sys/block/zramX/reset) so keeping how many of
writeback happened until you reset the zram to allocate extra writeback
budget in next setting is user's job.
Signed-off-by: Minchan Kim
---
I
/zram0/writeback_limit
The writeback_limit count will reset whenever you reset zram(e.g.,
system reboot, echo 1 > /sys/block/zramX/reset) so keeping how many of
writeback happened until you reset the zram to allocate extra writeback
budget in next setting is user's job.
Signed-off-by: Minchan Kim
---
I
wed-by: Joey Pabalinas
Reviewed-by: Sergey Senozhatsky
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 21a7046958a3..d1459cc1159f 100644
--- a/driver
0th block is idle zpage. With this feature,
user can how many zram has idle pages which are waste of memory.
Reviewed-by: Joey Pabalinas
Reviewed-by: Sergey Senozhatsky
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8 +++
Documentation/blockdev/zram.txt|
se incompressible pages
doesn't go to backing storage automatically. Instead, user should
do it via "echo huge" > /sys/block/zram/writeback" manually.
== &< ==
If we may hear some regression, we could restore the function with
different implemenataion.
[1], https://lore
bd_stat represents things happened in backing device. Currently,
it supports bd_counts, bd_reads and bd_writes which are helpful
to understand wearout of flash and memory saving.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8 ++
Documentation/blockdev
n zram_slot_slot_free_notify.
To make it safe is this patch introduces zram_slot_trylock where
zram_slot_free_notify uses it. Although it's rare to be contented,
this patch adds new debug stat "miss_free" to keep monitoring
how often it happens.
Reviewed-by: Joey Pabalinas
Reviewed-by: Serge
wed-by: Joey Pabalinas
Reviewed-by: Sergey Senozhatsky
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 21a7046958a3..d1459cc1159f 100644
--- a/driver
0th block is idle zpage. With this feature,
user can how many zram has idle pages which are waste of memory.
Reviewed-by: Joey Pabalinas
Reviewed-by: Sergey Senozhatsky
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8 +++
Documentation/blockdev/zram.txt|
se incompressible pages
doesn't go to backing storage automatically. Instead, user should
do it via "echo huge" > /sys/block/zram/writeback" manually.
== &< ==
If we may hear some regression, we could restore the function with
different implemenataion.
[1], https://lore
bd_stat represents things happened in backing device. Currently,
it supports bd_counts, bd_reads and bd_writes which are helpful
to understand wearout of flash and memory saving.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8 ++
Documentation/blockdev
n zram_slot_slot_free_notify.
To make it safe is this patch introduces zram_slot_trylock where
zram_slot_free_notify uses it. Although it's rare to be contented,
this patch adds new debug stat "miss_free" to keep monitoring
how often it happens.
Reviewed-by: Joey Pabalinas
Reviewed-by: Serge
This patch does renaming some variables and restructuring
some codes for better redability in writeback and zs_free_page.
Reviewed-by: Joey Pabalinas
Reviewed-by: Sergey Senozhatsky
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 105 +-
drivers
v2
- use strscpy instead of strlcpy - Joey Pabalinas
- remove irqlock for bitmap op - akpm
- don't use page as stat unit - akpm
* from v1
- add fix dobule free backing device - minchan
- change writeback/idle interface - minchan
- remove direct incompressible page writeback - sergey
Minc
v2
- use strscpy instead of strlcpy - Joey Pabalinas
- remove irqlock for bitmap op - akpm
- don't use page as stat unit - akpm
* from v1
- add fix dobule free backing device - minchan
- change writeback/idle interface - minchan
- remove direct incompressible page writeback - sergey
Minc
This patch does renaming some variables and restructuring
some codes for better redability in writeback and zs_free_page.
Reviewed-by: Joey Pabalinas
Reviewed-by: Sergey Senozhatsky
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 105 +-
drivers
On Fri, Nov 30, 2018 at 01:36:56PM +0900, Sergey Senozhatsky wrote:
> On (11/27/18 14:54), Minchan Kim wrote:
> > Inherently, swap device has many idle pages which are rare touched since
> > it was allocated. It is never problem if we use storage device as swap.
> > How
On Fri, Nov 30, 2018 at 01:36:56PM +0900, Sergey Senozhatsky wrote:
> On (11/27/18 14:54), Minchan Kim wrote:
> > Inherently, swap device has many idle pages which are rare touched since
> > it was allocated. It is never problem if we use storage device as swap.
> > How
On Thu, Nov 29, 2018 at 11:23:58AM +0900, Sergey Senozhatsky wrote:
> On (11/27/18 14:54), Minchan Kim wrote:
> > diff --git a/Documentation/ABI/testing/sysfs-block-zram
> > b/Documentation/ABI/testing/sysfs-block-zram
> > index 65fc33b2f53b..9d2339a485c8 100644
> &
On Thu, Nov 29, 2018 at 11:23:58AM +0900, Sergey Senozhatsky wrote:
> On (11/27/18 14:54), Minchan Kim wrote:
> > diff --git a/Documentation/ABI/testing/sysfs-block-zram
> > b/Documentation/ABI/testing/sysfs-block-zram
> > index 65fc33b2f53b..9d2339a485c8 100644
> &
On Wed, Nov 28, 2018 at 03:41:41PM -0800, Andrew Morton wrote:
> On Tue, 27 Nov 2018 14:54:29 +0900 Minchan Kim wrote:
>
> > On small memory system, there are lots of write IO so if we use
> > flash device as swap, there would be serious flash wearout.
> > To over
On Wed, Nov 28, 2018 at 03:41:41PM -0800, Andrew Morton wrote:
> On Tue, 27 Nov 2018 14:54:29 +0900 Minchan Kim wrote:
>
> > On small memory system, there are lots of write IO so if we use
> > flash device as swap, there would be serious flash wearout.
> > To over
On Wed, Nov 28, 2018 at 03:30:21PM -0800, Andrew Morton wrote:
> On Tue, 27 Nov 2018 11:07:54 +0900 Minchan Kim wrote:
>
> > On Mon, Nov 26, 2018 at 12:58:33PM -0800, Andrew Morton wrote:
> > > On Mon, 26 Nov 2018 17:28:12 +0900 Minchan Kim wrote:
> > >
> &g
On Wed, Nov 28, 2018 at 03:30:21PM -0800, Andrew Morton wrote:
> On Tue, 27 Nov 2018 11:07:54 +0900 Minchan Kim wrote:
>
> > On Mon, Nov 26, 2018 at 12:58:33PM -0800, Andrew Morton wrote:
> > > On Mon, 26 Nov 2018 17:28:12 +0900 Minchan Kim wrote:
> > >
> &g
Hi Andrew,
On Wed, Nov 28, 2018 at 03:35:59PM -0800, Andrew Morton wrote:
> On Tue, 27 Nov 2018 14:54:27 +0900 Minchan Kim wrote:
>
> > This patch supports new feature "zram idle/huge page writeback".
> > On zram-swap usecase, zram has usually many idle/huge sw
Hi Andrew,
On Wed, Nov 28, 2018 at 03:35:59PM -0800, Andrew Morton wrote:
> On Tue, 27 Nov 2018 14:54:27 +0900 Minchan Kim wrote:
>
> > This patch supports new feature "zram idle/huge page writeback".
> > On zram-swap usecase, zram has usually many idle/huge sw
"writeback_limit" on zram. With that,
if current writeback IO count(/sys/block/zramX/io_stat) excceds
the limitation, zram stops further writeback until admin can reset
the limit.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 9 +
Documentation/blockde
"writeback_limit" on zram. With that,
if current writeback IO count(/sys/block/zramX/io_stat) excceds
the limitation, zram stops further writeback until admin can reset
the limit.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 9 +
Documentation/blockde
This patch does renaming some variables and restructuring
some codes for better redability in writeback and zs_free_page.
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 105 +-
drivers/block/zram/zram_drv.h | 8 +--
2 files changed, 44
bd_stat represents things happened in backing device. Currently,
it supports bd_counts, bd_reads and bd_writes which are helpful
to understand wearout of flash and memory saving.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8 ++
Documentation/blockdev
n't go to backing storage automatically. Instead, usre should
do it via "echo huge" > /sys/block/zram/writeback" manually.
If we hear some regression, we could restore the function.
Reviewed-by: Joey Pabalinas
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/
ges_ok+0x1e3/0x490
[ 31.112437] hardirqs last disabled at (4466): []
trace_hardirqs_off_thunk+0x1a/0x1c
[ 31.113973] softirqs last enabled at (3420): []
__do_softirq+0x333/0x446
[ 31.115364] softirqs last disabled at (3407): []
irq_exit+0xd1/0xe0
Cc: sta...@vger.kernel.org # 4.14+
Signed-off
0th block is idle zpage. With this feature,
user can how many zram has idle pages which are waste of memory.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8 +++
Documentation/blockdev/zram.txt| 10 ++--
drivers/block/zram/zram_
n zram_slot_slot_free_notify.
To make it safe is this patch introduces zram_slot_trylock where
zram_slot_free_notify uses it. Although it's rare to be contented,
this patch adds new debug stat "miss_free" to keep monitoring
how often it happens.
Signed-off-b
ges_ok+0x1e3/0x490
[ 31.112437] hardirqs last disabled at (4466): []
trace_hardirqs_off_thunk+0x1a/0x1c
[ 31.113973] softirqs last enabled at (3420): []
__do_softirq+0x333/0x446
[ 31.115364] softirqs last disabled at (3407): []
irq_exit+0xd1/0xe0
Cc: sta...@vger.kernel.org # 4.14+
Signed-off
0th block is idle zpage. With this feature,
user can how many zram has idle pages which are waste of memory.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8 +++
Documentation/blockdev/zram.txt| 10 ++--
drivers/block/zram/zram_
n zram_slot_slot_free_notify.
To make it safe is this patch introduces zram_slot_trylock where
zram_slot_free_notify uses it. Although it's rare to be contented,
this patch adds new debug stat "miss_free" to keep monitoring
how often it happens.
Signed-off-b
This patch does renaming some variables and restructuring
some codes for better redability in writeback and zs_free_page.
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 105 +-
drivers/block/zram/zram_drv.h | 8 +--
2 files changed, 44
bd_stat represents things happened in backing device. Currently,
it supports bd_counts, bd_reads and bd_writes which are helpful
to understand wearout of flash and memory saving.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8 ++
Documentation/blockdev
n't go to backing storage automatically. Instead, usre should
do it via "echo huge" > /sys/block/zram/writeback" manually.
If we hear some regression, we could restore the function.
Reviewed-by: Joey Pabalinas
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/
eback/idle interface - minchan
- remove direct incompressible page writeback - sergey
Minchan Kim (7):
zram: fix lockdep warning of free block handling
zram: fix double free backing device
zram: refactoring flags and writeback stuff
zram: introduce ZRAM_IDLE flag
zram: support idle
eback/idle interface - minchan
- remove direct incompressible page writeback - sergey
Minchan Kim (7):
zram: fix lockdep warning of free block handling
zram: fix double free backing device
zram: refactoring flags and writeback stuff
zram: introduce ZRAM_IDLE flag
zram: support idle
On Sun, Nov 25, 2018 at 11:47:37PM -1000, Joey Pabalinas wrote:
> On Mon, Nov 26, 2018 at 05:28:11PM +0900, Minchan Kim wrote:
> > + strlcpy(mode_buf, buf, sizeof(mode_buf));
> > + /* ignore trailing newline */
> > + sz = strlen(mode_buf);
>
> One possible i
On Sun, Nov 25, 2018 at 11:47:37PM -1000, Joey Pabalinas wrote:
> On Mon, Nov 26, 2018 at 05:28:11PM +0900, Minchan Kim wrote:
> > + strlcpy(mode_buf, buf, sizeof(mode_buf));
> > + /* ignore trailing newline */
> > + sz = strlen(mode_buf);
>
> One possible i
On Mon, Nov 26, 2018 at 12:54:46PM -0800, Andrew Morton wrote:
> On Mon, 26 Nov 2018 17:28:13 +0900 Minchan Kim wrote:
>
> > On small memory system, there are lots of write IO so if we use
> > flash device as swap, there would be serious flash wearout.
> > To over
On Mon, Nov 26, 2018 at 12:54:46PM -0800, Andrew Morton wrote:
> On Mon, 26 Nov 2018 17:28:13 +0900 Minchan Kim wrote:
>
> > On small memory system, there are lots of write IO so if we use
> > flash device as swap, there would be serious flash wearout.
> > To over
On Mon, Nov 26, 2018 at 12:58:33PM -0800, Andrew Morton wrote:
> On Mon, 26 Nov 2018 17:28:12 +0900 Minchan Kim wrote:
>
> > +File /sys/block/zram/bd_stat
> > +
> > +The stat file represents device's backing device statistics. It consists of
> > +a single line of t
On Mon, Nov 26, 2018 at 12:58:33PM -0800, Andrew Morton wrote:
> On Mon, 26 Nov 2018 17:28:12 +0900 Minchan Kim wrote:
>
> > +File /sys/block/zram/bd_stat
> > +
> > +The stat file represents device's backing device statistics. It consists of
> > +a single line of t
On Mon, Nov 26, 2018 at 12:49:28PM -0800, Andrew Morton wrote:
> On Mon, 26 Nov 2018 17:28:07 +0900 Minchan Kim wrote:
>
> >
> > ...
> >
> > With writeback feature, zram_slot_free_notify could be called
> > in softirq context by end_swap_bio_read. H
On Mon, Nov 26, 2018 at 12:49:28PM -0800, Andrew Morton wrote:
> On Mon, 26 Nov 2018 17:28:07 +0900 Minchan Kim wrote:
>
> >
> > ...
> >
> > With writeback feature, zram_slot_free_notify could be called
> > in softirq context by end_swap_bio_read. H
This patch does renaming some variables and restructuring
some codes for better redability in writeback and zs_free_page.
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 105 +-
drivers/block/zram/zram_drv.h | 8 +--
2 files changed, 44
n't go to backing storage automatically. Instead, usre should
do it via "echo huge" > /sys/block/zram/writeback" manually.
If we hear some regression, we could restore the function.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 7 +
Documentation/b
ather than bottom
half is swap_slot_free_notify could be called with irq disabled
so it breaks local_bh_enable's rule. The irqlock works on only
writebacked zram slot entry so it should be not frequent lock.
Cc: sta...@vger.kernel.org # 4.14+
Signed-off-by: Minchan Kim
---
drivers/block/zram/zra
ges_ok+0x1e3/0x490
[ 31.112437] hardirqs last disabled at (4466): []
trace_hardirqs_off_thunk+0x1a/0x1c
[ 31.113973] softirqs last enabled at (3420): []
__do_softirq+0x333/0x446
[ 31.115364] softirqs last disabled at (3407): []
irq_exit+0xd1/0xe0
Cc: sta...@vger.kernel.org # 4.14+
Signed-off
This patch does renaming some variables and restructuring
some codes for better redability in writeback and zs_free_page.
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 105 +-
drivers/block/zram/zram_drv.h | 8 +--
2 files changed, 44
n't go to backing storage automatically. Instead, usre should
do it via "echo huge" > /sys/block/zram/writeback" manually.
If we hear some regression, we could restore the function.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 7 +
Documentation/b
ather than bottom
half is swap_slot_free_notify could be called with irq disabled
so it breaks local_bh_enable's rule. The irqlock works on only
writebacked zram slot entry so it should be not frequent lock.
Cc: sta...@vger.kernel.org # 4.14+
Signed-off-by: Minchan Kim
---
drivers/block/zram/zra
ges_ok+0x1e3/0x490
[ 31.112437] hardirqs last disabled at (4466): []
trace_hardirqs_off_thunk+0x1a/0x1c
[ 31.113973] softirqs last enabled at (3420): []
__do_softirq+0x333/0x446
[ 31.115364] softirqs last disabled at (3407): []
irq_exit+0xd1/0xe0
Cc: sta...@vger.kernel.org # 4.14+
Signed-off
ix lockdep warning of free block handling
zram: fix double free backing device
* from v1
- add fix dobule free backing device - minchan
- change writeback/idle interface - minchan
- remove direct incompressible page writeback - sergey
Minchan Kim (7):
zram: fix lockdep warning of
"writeback_limit" on zram. With that,
if current writeback IO count(/sys/block/zramX/io_stat) excceds
the limitation, zram stops further writeback until admin can reset
the limit.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 9 +
Documentation/blockde
0th block is idle zpage. With this feature,
user can how many zram has idle pages which are waste of memory.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8
Documentation/blockdev/zram.txt| 10 ++--
drivers/block/zram/zram_
bd_stat represents things happened in backing device. Currently,
it supports bd_counts, bd_reads and bd_writes which are helpful
to understand wearout of flash and memory saving.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8 ++
Documentation/blockdev
0th block is idle zpage. With this feature,
user can how many zram has idle pages which are waste of memory.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8
Documentation/blockdev/zram.txt| 10 ++--
drivers/block/zram/zram_
bd_stat represents things happened in backing device. Currently,
it supports bd_counts, bd_reads and bd_writes which are helpful
to understand wearout of flash and memory saving.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8 ++
Documentation/blockdev
ix lockdep warning of free block handling
zram: fix double free backing device
* from v1
- add fix dobule free backing device - minchan
- change writeback/idle interface - minchan
- remove direct incompressible page writeback - sergey
Minchan Kim (7):
zram: fix lockdep warning of
"writeback_limit" on zram. With that,
if current writeback IO count(/sys/block/zramX/io_stat) excceds
the limitation, zram stops further writeback until admin can reset
the limit.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 9 +
Documentation/blockde
Reinecke
Tested-by: Howard Chen
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 18 ++
1 file changed, 6 insertions(+), 12 deletions(-)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 7e94459a489a..5f4e6a3c2dde 100644
--- a/drivers/block
Reinecke
Tested-by: Howard Chen
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 18 ++
1 file changed, 6 insertions(+), 12 deletions(-)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 7e94459a489a..5f4e6a3c2dde 100644
--- a/drivers/block
Reinecke
Tested-by: Howard Chen
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 26 ++
1 file changed, 6 insertions(+), 20 deletions(-)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 502406c9e6e1..616ee4f9c233 100644
Reinecke
Tested-by: Howard Chen
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 26 ++
1 file changed, 6 insertions(+), 20 deletions(-)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 502406c9e6e1..616ee4f9c233 100644
Reinecke
Tested-by: Howard Chen
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 26 ++
1 file changed, 6 insertions(+), 20 deletions(-)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index b7c0b69a02f5..d64a53d3270a 100644
Reinecke
Tested-by: Howard Chen
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 26 ++
1 file changed, 6 insertions(+), 20 deletions(-)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index b7c0b69a02f5..d64a53d3270a 100644
Reinecke
Tested-by: Howard Chen
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 26 ++
1 file changed, 6 insertions(+), 20 deletions(-)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 1e2648e4c286..27b202c64c84 100644
Reinecke
Tested-by: Howard Chen
Signed-off-by: Minchan Kim
---
drivers/block/zram/zram_drv.c | 26 ++
1 file changed, 6 insertions(+), 20 deletions(-)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 1e2648e4c286..27b202c64c84 100644
On Thu, Nov 22, 2018 at 03:59:26PM +0900, Sergey Senozhatsky wrote:
> On (11/22/18 15:31), Minchan Kim wrote:
> > >
> > > I got what you mean now. Let's call it as "incompressible page wrieback"
> > > to prevent confusing.
> > >
> > >
On Thu, Nov 22, 2018 at 03:59:26PM +0900, Sergey Senozhatsky wrote:
> On (11/22/18 15:31), Minchan Kim wrote:
> > >
> > > I got what you mean now. Let's call it as "incompressible page wrieback"
> > > to prevent confusing.
> > >
> > >
On Thu, Nov 22, 2018 at 03:15:42PM +0900, Minchan Kim wrote:
> On Thu, Nov 22, 2018 at 02:40:40PM +0900, Sergey Senozhatsky wrote:
> > On (11/22/18 14:04), Minchan Kim wrote:
> > >
> > > > additionally, it's too simple. It writes-back pages which can be
> &g
On Thu, Nov 22, 2018 at 03:15:42PM +0900, Minchan Kim wrote:
> On Thu, Nov 22, 2018 at 02:40:40PM +0900, Sergey Senozhatsky wrote:
> > On (11/22/18 14:04), Minchan Kim wrote:
> > >
> > > > additionally, it's too simple. It writes-back pages which can be
> &g
On Thu, Nov 22, 2018 at 02:40:40PM +0900, Sergey Senozhatsky wrote:
> On (11/22/18 14:04), Minchan Kim wrote:
> >
> > > additionally, it's too simple. It writes-back pages which can be
> > > swapped in immediately; which basically means that we do pointless
> &g
On Thu, Nov 22, 2018 at 02:40:40PM +0900, Sergey Senozhatsky wrote:
> On (11/22/18 14:04), Minchan Kim wrote:
> >
> > > additionally, it's too simple. It writes-back pages which can be
> > > swapped in immediately; which basically means that we do pointless
> &g
On Tue, Nov 20, 2018 at 11:46:59AM +0900, Sergey Senozhatsky wrote:
> Hello,
>
> On (11/16/18 16:20), Minchan Kim wrote:
> [..]
> > +static ssize_t idle_store(struct device *dev,
> > + struct device_attribute *attr, const char *buf, size_t len)
> >
On Tue, Nov 20, 2018 at 11:46:59AM +0900, Sergey Senozhatsky wrote:
> Hello,
>
> On (11/16/18 16:20), Minchan Kim wrote:
> [..]
> > +static ssize_t idle_store(struct device *dev,
> > + struct device_attribute *attr, const char *buf, size_t len)
> >
On Thu, Nov 22, 2018 at 11:14:43AM +0900, Sergey Senozhatsky wrote:
> On (11/21/18 05:34), Minchan Kim wrote:
> > >
> > > Just a thought,
> > >
> > > I wonder if it will make sense (and if it will be possible) to writeback
> > > idle _c
On Thu, Nov 22, 2018 at 11:14:43AM +0900, Sergey Senozhatsky wrote:
> On (11/21/18 05:34), Minchan Kim wrote:
> > >
> > > Just a thought,
> > >
> > > I wonder if it will make sense (and if it will be possible) to writeback
> > > idle _c
On Wed, Nov 21, 2018 at 01:55:51PM +0900, Sergey Senozhatsky wrote:
> On (11/16/18 16:20), Minchan Kim wrote:
> > + zram_set_flag(zram, index, ZRAM_UNDER_WB);
> > + zram_slot_unlock(zram, index);
> > + if (zram_bvec_read(z
On Wed, Nov 21, 2018 at 01:55:51PM +0900, Sergey Senozhatsky wrote:
> On (11/16/18 16:20), Minchan Kim wrote:
> > + zram_set_flag(zram, index, ZRAM_UNDER_WB);
> > + zram_slot_unlock(zram, index);
> > + if (zram_bvec_read(z
On Thu, Nov 15, 2018 at 12:45:04PM -0500, Sasha Levin wrote:
> On Wed, Nov 14, 2018 at 02:52:23PM +0900, Minchan Kim wrote:
> > commit fef912bf860e upstream.
> > commit 98af4d4df889 upstream.
> >
> > I got a report from Howard Chen that he saw zram and sysfs race(ie,
On Thu, Nov 15, 2018 at 12:45:04PM -0500, Sasha Levin wrote:
> On Wed, Nov 14, 2018 at 02:52:23PM +0900, Minchan Kim wrote:
> > commit fef912bf860e upstream.
> > commit 98af4d4df889 upstream.
> >
> > I got a report from Howard Chen that he saw zram and sysfs race(ie,
bd_stat reprenents things happened in backing device. Currently,
it supports bd_counts, bd_reads and bd_writes which are helpful
to understand wearout of flash and memory saving.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8 ++
Documentation/blockdev
"writeback_limit" on zram. With that,
if current writeback IO count(/sys/block/zramX/io_stat) excceds
the limitation, zram stops further writeback until admin can reset
the limit.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 9
Documentation/blockde
bd_stat reprenents things happened in backing device. Currently,
it supports bd_counts, bd_reads and bd_writes which are helpful
to understand wearout of flash and memory saving.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8 ++
Documentation/blockdev
"writeback_limit" on zram. With that,
if current writeback IO count(/sys/block/zramX/io_stat) excceds
the limitation, zram stops further writeback until admin can reset
the limit.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 9
Documentation/blockde
writeback both pages
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 7 +
Documentation/blockdev/zram.txt| 19 +++
drivers/block/zram/Kconfig | 5 +-
drivers/block/zram/zram_drv.c | 166 +++--
d
writeback both pages
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 7 +
Documentation/blockdev/zram.txt| 19 +++
drivers/block/zram/Kconfig | 5 +-
drivers/block/zram/zram_drv.c | 166 +++--
d
ather than bottom
half is swap_slot_free_notify could be called with irq disabled
so it breaks local_bh_enable's rule. The irqlock works on only
writebacked zram slot entry so it should be not frequent lock.
Cc: sta...@vger.kernel.org # 4.14+
Signed-off-by: Minchan Kim
---
drivers/block/zram/zra
0th block is idle zpage. With this feature,
user can how many zram has idle pages which are waste of memory.
Signed-off-by: Minchan Kim
---
Documentation/ABI/testing/sysfs-block-zram | 8
Documentation/blockdev/zram.txt| 10 +++--
drivers/block/zram/zram_
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