[PATCH] sunrpc: remove SLAB_MEM_SPREAD flag usage

[PATCH] sunrpc: remove SLAB_MEM_SPREAD flag usage

[chengming.zhou]

From: Chengming Zhou <zhouchengming@bytedance.com>

The SLAB_MEM_SPREAD flag is already a no-op as of 6.8-rc1, remove
its usage so we can delete it from slab. No functional change.

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
---
 net/sunrpc/rpc_pipe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index dcc2b4f49e77..910a5d850d04 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -1490,7 +1490,7 @@ int register_rpc_pipefs(void)
 	rpc_inode_cachep = kmem_cache_create("rpc_inode_cache",
 				sizeof(struct rpc_inode),
 				0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
-						SLAB_MEM_SPREAD|SLAB_ACCOUNT),
+						SLAB_ACCOUNT),
 				init_once);
 	if (!rpc_inode_cachep)
 		return -ENOMEM;
-- 
2.40.1

Re: [PATCH] sunrpc: remove SLAB_MEM_SPREAD flag usage

[Chengming Zhou]

On 2024/2/24 21:51, chengming.zhou@linux.dev wrote:
> From: Chengming Zhou <zhouchengming@bytedance.com>
> 
> The SLAB_MEM_SPREAD flag is already a no-op as of 6.8-rc1, remove
> its usage so we can delete it from slab. No functional change.

Update changelog to make it clearer:

The SLAB_MEM_SPREAD flag used to be implemented in SLAB, which was
removed as of v6.8-rc1, so it became a dead flag since the commit
16a1d968358a ("mm/slab: remove mm/slab.c and slab_def.h"). And the
series[1] went on to mark it obsolete to avoid confusion for users.
Here we can just remove all its users, which has no functional change.

[1] https://lore.kernel.org/all/20240223-slab-cleanup-flags-v2-1-02f1753e8303@suse.cz/

Thanks!

> 
> Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
> ---
>  net/sunrpc/rpc_pipe.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
> index dcc2b4f49e77..910a5d850d04 100644
> --- a/net/sunrpc/rpc_pipe.c
> +++ b/net/sunrpc/rpc_pipe.c
> @@ -1490,7 +1490,7 @@ int register_rpc_pipefs(void)
>  	rpc_inode_cachep = kmem_cache_create("rpc_inode_cache",
>  				sizeof(struct rpc_inode),
>  				0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
> -						SLAB_MEM_SPREAD|SLAB_ACCOUNT),
> +						SLAB_ACCOUNT),
>  				init_once);
>  	if (!rpc_inode_cachep)
>  		return -ENOMEM;

Re: [PATCH] sunrpc: remove SLAB_MEM_SPREAD flag usage

[Simon Horman]

On Mon, Feb 26, 2024 at 12:23:49PM +0800, Chengming Zhou wrote:
> On 2024/2/24 21:51, chengming.zhou@linux.dev wrote:
> > From: Chengming Zhou <zhouchengming@bytedance.com>
> > 
> > The SLAB_MEM_SPREAD flag is already a no-op as of 6.8-rc1, remove
> > its usage so we can delete it from slab. No functional change.
> 
> Update changelog to make it clearer:
> 
> The SLAB_MEM_SPREAD flag used to be implemented in SLAB, which was
> removed as of v6.8-rc1, so it became a dead flag since the commit
> 16a1d968358a ("mm/slab: remove mm/slab.c and slab_def.h"). And the
> series[1] went on to mark it obsolete to avoid confusion for users.
> Here we can just remove all its users, which has no functional change.
> 
> [1] https://lore.kernel.org/all/20240223-slab-cleanup-flags-v2-1-02f1753e8303@suse.cz/
> 
> Thanks!

Thanks Chengming Zhou,

As per my comment on a similar patch [*], this seems reasonable to me. But
I think it would be best to post a v2 of this patch with the updated patch
description (which is very helpful, BTW).

[*] https://lore.kernel.org/all/20240227170937.GD277116@kernel.org/

> 
> > 
> > Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
> > ---
> >  net/sunrpc/rpc_pipe.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
> > index dcc2b4f49e77..910a5d850d04 100644
> > --- a/net/sunrpc/rpc_pipe.c
> > +++ b/net/sunrpc/rpc_pipe.c
> > @@ -1490,7 +1490,7 @@ int register_rpc_pipefs(void)
> >  	rpc_inode_cachep = kmem_cache_create("rpc_inode_cache",
> >  				sizeof(struct rpc_inode),
> >  				0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
> > -						SLAB_MEM_SPREAD|SLAB_ACCOUNT),
> > +						SLAB_ACCOUNT),
> >  				init_once);

Also, while we are here, perhaps the indentation can be improved.
Something like:

	rpc_inode_cachep = kmem_cache_create("rpc_inode_cache",
				sizeof(struct rpc_inode),
				0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
				    SLAB_ACCOUNT),
				init_once);

> >  	if (!rpc_inode_cachep)
> >  		return -ENOMEM;
> 

[PATCH v2] sunrpc: remove SLAB_MEM_SPREAD flag usage

[Chengming Zhou]

From: Chengming Zhou <zhouchengming@bytedance.com>

The SLAB_MEM_SPREAD flag used to be implemented in SLAB, which was
removed as of v6.8-rc1, so it became a dead flag since the commit
16a1d968358a ("mm/slab: remove mm/slab.c and slab_def.h"). And the
series[1] went on to mark it obsolete to avoid confusion for users.
Here we can just remove all its users, which has no functional change.

[1] https://lore.kernel.org/all/20240223-slab-cleanup-flags-v2-1-02f1753e8303@suse.cz/

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
---
v2:
 - Update the patch description and include the related link to
   make it clearer that SLAB_MEM_SPREAD flag is now a no-op.
---
 net/sunrpc/rpc_pipe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index dcc2b4f49e77..910a5d850d04 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -1490,7 +1490,7 @@ int register_rpc_pipefs(void)
 	rpc_inode_cachep = kmem_cache_create("rpc_inode_cache",
 				sizeof(struct rpc_inode),
 				0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
-						SLAB_MEM_SPREAD|SLAB_ACCOUNT),
+						SLAB_ACCOUNT),
 				init_once);
 	if (!rpc_inode_cachep)
 		return -ENOMEM;
-- 
2.40.1

[PATCH v3] sunrpc: remove SLAB_MEM_SPREAD flag usage

[Chengming Zhou]

From: Chengming Zhou <zhouchengming@bytedance.com>

The SLAB_MEM_SPREAD flag used to be implemented in SLAB, which was
removed as of v6.8-rc1, so it became a dead flag since the commit
16a1d968358a ("mm/slab: remove mm/slab.c and slab_def.h"). And the
series[1] went on to mark it obsolete to avoid confusion for users.
Here we can just remove all its users, which has no functional change.

[1] https://lore.kernel.org/all/20240223-slab-cleanup-flags-v2-1-02f1753e8303@suse.cz/

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
---
v3:
 - Improve the indentation, per Simon Horman.

v2:
 - Update the patch description and include the related link to
   make it clearer that SLAB_MEM_SPREAD flag is now a no-op.
---
 net/sunrpc/rpc_pipe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index dcc2b4f49e77..b639d8eb6080 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -1490,7 +1490,7 @@ int register_rpc_pipefs(void)
 	rpc_inode_cachep = kmem_cache_create("rpc_inode_cache",
 				sizeof(struct rpc_inode),
 				0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
-						SLAB_MEM_SPREAD|SLAB_ACCOUNT),
+				    SLAB_ACCOUNT),
 				init_once);
 	if (!rpc_inode_cachep)
 		return -ENOMEM;
-- 
2.40.1

Re: [PATCH v3] sunrpc: remove SLAB_MEM_SPREAD flag usage

[Simon Horman]

On Wed, Feb 28, 2024 at 03:12:34AM +0000, Chengming Zhou wrote:
> From: Chengming Zhou <zhouchengming@bytedance.com>
> 
> The SLAB_MEM_SPREAD flag used to be implemented in SLAB, which was
> removed as of v6.8-rc1, so it became a dead flag since the commit
> 16a1d968358a ("mm/slab: remove mm/slab.c and slab_def.h"). And the
> series[1] went on to mark it obsolete to avoid confusion for users.
> Here we can just remove all its users, which has no functional change.
> 
> [1] https://lore.kernel.org/all/20240223-slab-cleanup-flags-v2-1-02f1753e8303@suse.cz/
> 
> Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
> ---
> v3:
>  - Improve the indentation, per Simon Horman.
> 
> v2:
>  - Update the patch description and include the related link to
>    make it clearer that SLAB_MEM_SPREAD flag is now a no-op.

Thanks for the updates.

Reviewed-by: Simon Horman <horms@kernel.org>

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