[PATCH v2 1/2] swapon.2: Adjust decreased value under CONFIG_MIGRATION

[PATCH v2 1/2] swapon.2: Adjust decreased value under CONFIG_MIGRATION

[Yang Xu]

After kernel 5.19[1], the limit is decreased by 3.

[1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/swap.h?id=6c287605f

Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
---
 man2/swapon.2 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/man2/swapon.2 b/man2/swapon.2
index c0e61cbc6..2bc477d18 100644
--- a/man2/swapon.2
+++ b/man2/swapon.2
@@ -164,7 +164,8 @@ Before Linux 2.4.10,
 .B MAX_SWAPFILES
 has the value 8;
 since Linux 2.4.10, it has the value 32.
-Since Linux 2.6.18, the limit is decreased by 2 (thus: 30)
+Since Linux 2.6.18, the limit is decreased by 2 (Since Linux 5.19.0,
+the limit is decreased by 3)
 if the kernel is built with the
 .B CONFIG_MIGRATION
 option
-- 
2.27.0

[PATCH v2 2/2] swapon.2: Adjust decreased value under CONFIG_PTE_MARKER

[Yang Xu]

Since linux 5.19[1], MAX_SWAPFILES will be futher decreased
1 if kernel built with CONFIG_PTE_MARKER.

[1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/swap.h?id=679d10331

Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
---
 man2/swapon.2 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/man2/swapon.2 b/man2/swapon.2
index 2bc477d18..13282ff96 100644
--- a/man2/swapon.2
+++ b/man2/swapon.2
@@ -181,6 +181,10 @@ Since Linux 5.14, the limit is further decreased by 4
 if the kernel is built with the
 .B CONFIG_DEVICE_PRIVATE
 option.
+Since Linux 5.19, the limit is further decreased by 1
+if the kernel is built with the
+.B CONFIG_PTE_MARKER
+option.
 .P
 Discard of swap pages was introduced in Linux 2.6.29,
 then made conditional
-- 
2.27.0

Re: [LTP] [PATCH v2 1/2] swapon.2: Adjust decreased value under CONFIG_MIGRATION

[Yang Xu (Fujitsu)]

Hi all,

Sorry, I forgot to send this "ping mail" to man-pages.
PING

Best Regards
Yang Xu

> Hi all,
> 
> Ping
> 
> Best Regards
> Yang Xu
> 
>> After kernel 5.19[1], the limit is decreased by 3.
>>
>> [1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/swap.h?id=6c287605f
>>
>> Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
>> ---
>>    man2/swapon.2 | 3 ++-
>>    1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/man2/swapon.2 b/man2/swapon.2
>> index c0e61cbc6..2bc477d18 100644
>> --- a/man2/swapon.2
>> +++ b/man2/swapon.2
>> @@ -164,7 +164,8 @@ Before Linux 2.4.10,
>>    .B MAX_SWAPFILES
>>    has the value 8;
>>    since Linux 2.4.10, it has the value 32.
>> -Since Linux 2.6.18, the limit is decreased by 2 (thus: 30)
>> +Since Linux 2.6.18, the limit is decreased by 2 (Since Linux 5.19.0,
>> +the limit is decreased by 3)
>>    if the kernel is built with the
>>    .B CONFIG_MIGRATION
>>    option
> 

Re: [PATCH v2 2/2] swapon.2: Adjust decreased value under CONFIG_PTE_MARKER

[Alejandro Colomar]

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Hi Yang,

On Tue, Dec 05, 2023 at 01:30:17AM -0500, Yang Xu wrote:
> Since linux 5.19[1], MAX_SWAPFILES will be futher decreased
> 1 if kernel built with CONFIG_PTE_MARKER.
> 
> [1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/swap.h?id=679d10331
> 
> Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
> ---

Patch applied.
<https://www.alejandro-colomar.es/src/alx/linux/man-pages/man-pages.git/commit/?h=contrib&id=0a5a5dee8927c9e21f13c250a752f3c6ba9d1a09>

Have a lovely day,
Alex

>  man2/swapon.2 | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/man2/swapon.2 b/man2/swapon.2
> index 2bc477d18..13282ff96 100644
> --- a/man2/swapon.2
> +++ b/man2/swapon.2
> @@ -181,6 +181,10 @@ Since Linux 5.14, the limit is further decreased by 4
>  if the kernel is built with the
>  .B CONFIG_DEVICE_PRIVATE
>  option.
> +Since Linux 5.19, the limit is further decreased by 1
> +if the kernel is built with the
> +.B CONFIG_PTE_MARKER
> +option.
>  .P
>  Discard of swap pages was introduced in Linux 2.6.29,
>  then made conditional
> -- 
> 2.27.0
> 
> 

-- 
<https://www.alejandro-colomar.es/>
Looking for a remote C programming job at the moment.

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Re: [PATCH v2 1/2] swapon.2: Adjust decreased value under CONFIG_MIGRATION

[Alejandro Colomar]

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Hi Yang,

On Tue, Dec 05, 2023 at 01:30:16AM -0500, Yang Xu wrote:
> After kernel 5.19[1], the limit is decreased by 3.
> 
> [1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/swap.h?id=6c287605f
> 
> Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>

I've applied the patch, with some modifications:
<https://www.alejandro-colomar.es/src/alx/linux/man-pages/man-pages.git/commit/?h=contrib&id=5da8280ed6eefb3d70f86281579c4afae89230b1>

Cheers,
Alex

> ---
>  man2/swapon.2 | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/man2/swapon.2 b/man2/swapon.2
> index c0e61cbc6..2bc477d18 100644
> --- a/man2/swapon.2
> +++ b/man2/swapon.2
> @@ -164,7 +164,8 @@ Before Linux 2.4.10,
>  .B MAX_SWAPFILES
>  has the value 8;
>  since Linux 2.4.10, it has the value 32.
> -Since Linux 2.6.18, the limit is decreased by 2 (thus: 30)
> +Since Linux 2.6.18, the limit is decreased by 2 (Since Linux 5.19.0,
> +the limit is decreased by 3)
>  if the kernel is built with the
>  .B CONFIG_MIGRATION
>  option
> -- 
> 2.27.0
> 
> 

-- 
<https://www.alejandro-colomar.es/>
Looking for a remote C programming job at the moment.

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Re: [PATCH v2 1/2] swapon.2: Adjust decreased value under CONFIG_MIGRATION

[Alejandro Colomar]

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On Fri, Dec 15, 2023 at 12:13:30PM +0100, Alejandro Colomar wrote:
> Hi Yang,
> 
> On Tue, Dec 05, 2023 at 01:30:16AM -0500, Yang Xu wrote:
> > After kernel 5.19[1], the limit is decreased by 3.
> > 
> > [1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/swap.h?id=6c287605f
> > 
> > Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
> 
> I've applied the patch, with some modifications:
> <https://www.alejandro-colomar.es/src/alx/linux/man-pages/man-pages.git/commit/?h=contrib&id=5da8280ed6eefb3d70f86281579c4afae89230b1>

Oops, my modification was wrong.  I've amended that.  Here are the two
patches now:

<https://www.alejandro-colomar.es/src/alx/linux/man-pages/man-pages.git/commit/?h=contrib&id=90ba8cf3ab2536bdc138986c4581c62a3c0b60d4>
<https://www.alejandro-colomar.es/src/alx/linux/man-pages/man-pages.git/commit/?h=contrib&id=9e160cf3fd27181a72ec2fb628f64e971510f9f3>

> 
> Cheers,
> Alex
> 
> > ---
> >  man2/swapon.2 | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> > 
> > diff --git a/man2/swapon.2 b/man2/swapon.2
> > index c0e61cbc6..2bc477d18 100644
> > --- a/man2/swapon.2
> > +++ b/man2/swapon.2
> > @@ -164,7 +164,8 @@ Before Linux 2.4.10,
> >  .B MAX_SWAPFILES
> >  has the value 8;
> >  since Linux 2.4.10, it has the value 32.
> > -Since Linux 2.6.18, the limit is decreased by 2 (thus: 30)
> > +Since Linux 2.6.18, the limit is decreased by 2 (Since Linux 5.19.0,
> > +the limit is decreased by 3)
> >  if the kernel is built with the
> >  .B CONFIG_MIGRATION
> >  option
> > -- 
> > 2.27.0
> > 
> > 
> 
> -- 
> <https://www.alejandro-colomar.es/>
> Looking for a remote C programming job at the moment.



-- 
<https://www.alejandro-colomar.es/>
Looking for a remote C programming job at the moment.

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Re: [PATCH v2 1/2] swapon.2: Adjust decreased value under CONFIG_MIGRATION

[Yang Xu (Fujitsu)]

Hi Alex,

> On Fri, Dec 15, 2023 at 12:13:30PM +0100, Alejandro Colomar wrote:
>> Hi Yang,
>>
>> On Tue, Dec 05, 2023 at 01:30:16AM -0500, Yang Xu wrote:
>>> After kernel 5.19[1], the limit is decreased by 3.
>>>
>>> [1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/linux/swap.h?id=6c287605f
>>>
>>> Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
>>
>> I've applied the patch, with some modifications:
>> <https://www.alejandro-colomar.es/src/alx/linux/man-pages/man-pages.git/commit/?h=contrib&id=5da8280ed6eefb3d70f86281579c4afae89230b1>
> 
> Oops, my modification was wrong.  I've amended that.  Here are the two
> patches now:
> 
> <https://www.alejandro-colomar.es/src/alx/linux/man-pages/man-pages.git/commit/?h=contrib&id=90ba8cf3ab2536bdc138986c4581c62a3c0b60d4>
> <https://www.alejandro-colomar.es/src/alx/linux/man-pages/man-pages.git/commit/?h=contrib&id=9e160cf3fd27181a72ec2fb628f64e971510f9f3>
> 

Thanks for your work.

Best Regards
Yang Xu

>>
>> Cheers,
>> Alex
>>
>>> ---
>>>   man2/swapon.2 | 3 ++-
>>>   1 file changed, 2 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/man2/swapon.2 b/man2/swapon.2
>>> index c0e61cbc6..2bc477d18 100644
>>> --- a/man2/swapon.2
>>> +++ b/man2/swapon.2
>>> @@ -164,7 +164,8 @@ Before Linux 2.4.10,
>>>   .B MAX_SWAPFILES
>>>   has the value 8;
>>>   since Linux 2.4.10, it has the value 32.
>>> -Since Linux 2.6.18, the limit is decreased by 2 (thus: 30)
>>> +Since Linux 2.6.18, the limit is decreased by 2 (Since Linux 5.19.0,
>>> +the limit is decreased by 3)
>>>   if the kernel is built with the
>>>   .B CONFIG_MIGRATION
>>>   option
>>> -- 
>>> 2.27.0
>>>
>>>
>>
>> -- 
>> <https://www.alejandro-colomar.es/>
>> Looking for a remote C programming job at the moment.
> 
> 
>