Re: [PATCH] ceph: remove SLAB_MEM_SPREAD flag usage
From: Chengming Zhou
Date: Sun Feb 25 2024 - 21:43:09 EST
On 2024/2/26 09:43, Xiubo Li wrote:
> Hi Chengming,
>
> Thanks for your patch.
>
> BTW, could you share the link of the relevant patches to mark this a no-op ?
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. 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@xxxxxxx/
Thanks!
>
> Thanks
>
> - Xiubo
>
> On 2/24/24 21:47, chengming.zhou@xxxxxxxxx wrote:
>> From: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>
>>
>> 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@xxxxxxxxxxxxx>
>> ---
>> fs/ceph/super.c | 18 +++++++++---------
>> 1 file changed, 9 insertions(+), 9 deletions(-)
>>
>> diff --git a/fs/ceph/super.c b/fs/ceph/super.c
>> index 5ec102f6b1ac..4dcbbaa297f6 100644
>> --- a/fs/ceph/super.c
>> +++ b/fs/ceph/super.c
>> @@ -928,36 +928,36 @@ static int __init init_caches(void)
>> ceph_inode_cachep = kmem_cache_create("ceph_inode_info",
>> sizeof(struct ceph_inode_info),
>> __alignof__(struct ceph_inode_info),
>> - SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
>> - SLAB_ACCOUNT, ceph_inode_init_once);
>> + SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT,
>> + ceph_inode_init_once);
>> if (!ceph_inode_cachep)
>> return -ENOMEM;
>> - ceph_cap_cachep = KMEM_CACHE(ceph_cap, SLAB_MEM_SPREAD);
>> + ceph_cap_cachep = KMEM_CACHE(ceph_cap, 0);
>> if (!ceph_cap_cachep)
>> goto bad_cap;
>> - ceph_cap_snap_cachep = KMEM_CACHE(ceph_cap_snap, SLAB_MEM_SPREAD);
>> + ceph_cap_snap_cachep = KMEM_CACHE(ceph_cap_snap, 0);
>> if (!ceph_cap_snap_cachep)
>> goto bad_cap_snap;
>> ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush,
>> - SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
>> + SLAB_RECLAIM_ACCOUNT);
>> if (!ceph_cap_flush_cachep)
>> goto bad_cap_flush;
>> ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info,
>> - SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
>> + SLAB_RECLAIM_ACCOUNT);
>> if (!ceph_dentry_cachep)
>> goto bad_dentry;
>> - ceph_file_cachep = KMEM_CACHE(ceph_file_info, SLAB_MEM_SPREAD);
>> + ceph_file_cachep = KMEM_CACHE(ceph_file_info, 0);
>> if (!ceph_file_cachep)
>> goto bad_file;
>> - ceph_dir_file_cachep = KMEM_CACHE(ceph_dir_file_info, SLAB_MEM_SPREAD);
>> + ceph_dir_file_cachep = KMEM_CACHE(ceph_dir_file_info, 0);
>> if (!ceph_dir_file_cachep)
>> goto bad_dir_file;
>> - ceph_mds_request_cachep = KMEM_CACHE(ceph_mds_request, SLAB_MEM_SPREAD);
>> + ceph_mds_request_cachep = KMEM_CACHE(ceph_mds_request, 0);
>> if (!ceph_mds_request_cachep)
>> goto bad_mds_req;
>>
>