From: Al Viro <viro@zeniv.linux.org.uk>
To: Harry Yoo <harry.yoo@oracle.com>
Cc: linux-mm@kvack.org, Vlastimil Babka <vbabka@suse.cz>,
linux-fsdevel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
Mateusz Guzik <mguzik@gmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 01/15] static kmem_cache instances for core caches
Date: Wed, 14 Jan 2026 07:38:40 +0000 [thread overview]
Message-ID: <20260114073840.GT3634291@ZenIV> (raw)
In-Reply-To: <aWdGEI6iQBl3Xibi@hyeyoo>
On Wed, Jan 14, 2026 at 04:30:24PM +0900, Harry Yoo wrote:
> SLAB_NO_MERGE prevents both side of merging - when 1) creating the cache,
> and when 2) another cache tries to create an alias from it.
>
> Avoiding 1) makes sense, but is there a reason to prevent 2)?
>
> If it's fine for other caches to merge into a cache with static
> duration, then it's sufficient to update find_mergeable() to not attempt
> creating an alias during cache creation if args->preallocated is
> specified (instead of using SLAB_NO_MERGE).
Umm... For static-in-module - definitely (what if it goes away before
the dynamic alias?), for globally static... might be fine, I guess...
next prev parent reply other threads:[~2026-01-14 7:37 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-10 4:02 [RFC PATCH 00/15] kmem_cache instances with static storage duration Al Viro
2026-01-10 4:02 ` [RFC PATCH 01/15] static kmem_cache instances for core caches Al Viro
2026-01-10 5:40 ` Matthew Wilcox
2026-01-10 6:23 ` Al Viro
2026-01-14 7:30 ` Harry Yoo
2026-01-14 7:38 ` Al Viro [this message]
2026-01-10 4:02 ` [RFC PATCH 02/15] allow static-duration kmem_cache in modules Al Viro
2026-01-10 4:02 ` [RFC PATCH 03/15] make mnt_cache static-duration Al Viro
2026-01-10 4:02 ` [RFC PATCH 04/15] turn thread_cache static-duration Al Viro
2026-01-10 4:02 ` [RFC PATCH 05/15] turn signal_cache static-duration Al Viro
2026-01-10 4:02 ` [RFC PATCH 06/15] turn bh_cachep static-duration Al Viro
2026-01-10 4:02 ` [RFC PATCH 07/15] turn dentry_cache static-duration Al Viro
2026-01-10 4:02 ` [RFC PATCH 08/15] turn files_cachep static-duration Al Viro
2026-01-10 4:02 ` [RFC PATCH 09/15] make filp and bfilp caches static-duration Al Viro
2026-01-10 4:02 ` [RFC PATCH 10/15] turn sighand_cache static-duration Al Viro
2026-01-10 4:02 ` [RFC PATCH 11/15] turn mm_cachep static-duration Al Viro
2026-01-10 4:02 ` [RFC PATCH 12/15] turn task_struct_cachep static-duration Al Viro
2026-01-10 4:02 ` [RFC PATCH 13/15] turn fs_cachep static-duration Al Viro
2026-01-10 4:02 ` [RFC PATCH 14/15] turn inode_cachep static-duration Al Viro
2026-01-10 4:02 ` [RFC PATCH 15/15] turn ufs_inode_cache static-duration Al Viro
2026-01-10 5:33 ` [RFC PATCH 00/15] kmem_cache instances with static storage duration Linus Torvalds
2026-01-10 6:16 ` Al Viro
2026-01-14 7:12 ` Harry Yoo
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