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From: "Harry Yoo (Meta)" <harry@kernel.org>
To: Vlastimil Babka <vbabka@kernel.org>,
	 Andrew Morton <akpm@linux-foundation.org>,
	 Suren Baghdasaryan <surenb@google.com>,
	 Johannes Weiner <hannes@cmpxchg.org>,
	Michal Hocko <mhocko@kernel.org>,
	 Shakeel Butt <shakeel.butt@linux.dev>,
	 Roman Gushchin <roman.gushchin@linux.dev>
Cc: Hao Li <hao.li@linux.dev>, Christoph Lameter <cl@gentwo.org>,
	 David Rientjes <rientjes@google.com>,
	Muchun Song <muchun.song@linux.dev>,  Hao Ge <hao.ge@linux.dev>,
	Pedro Falcato <pfalcato@suse.de>,
	 linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	kernel-team@meta.com,  "Harry Yoo (Meta)" <harry@kernel.org>,
	Richard Weinberger <richard@nod.at>,
	 Anton Ivanov <anton.ivanov@cambridgegreys.com>,
	 Johannes Berg <johannes@sipsolutions.net>,
	linux-um@lists.infradead.org
Subject: [PATCH slab/for-next 12/14] hostfs: specify SLAB_MAY_ACCOUNT for inode cache
Date: Wed, 21 Oct 2026 12:46:53 +0100	[thread overview]
Message-ID: <20261021-memalloc-prof-dont-waste-slabobj-ext-metadata-v1-12-096800aa3330@kernel.org> (raw)
In-Reply-To: <20261021-memalloc-prof-dont-waste-slabobj-ext-metadata-v1-0-096800aa3330@kernel.org>

hostfs inodes are allocated with GFP_KERNEL_ACCOUNT. Specify
SLAB_MAY_ACCOUNT when the object may be charged to a memcg.
__GFP_ACCOUNT without SLAB_MAY_ACCOUNT will not be allowed.

Path: lookup -> hostfs_iget() -> hostfs_alloc_inode()
  -> alloc_inode_sb(sb, hostfs_inode_cache, GFP_KERNEL_ACCOUNT)

Assisted-by: LLM
Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: linux-um@lists.infradead.org
Signed-off-by: Harry Yoo (Meta) <harry@kernel.org>
---
 fs/hostfs/hostfs_kern.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 7add056d47d8..2d55f53569ca 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -1078,7 +1078,7 @@ MODULE_ALIAS_FS("hostfs");
 
 static int __init init_hostfs(void)
 {
-	hostfs_inode_cache = KMEM_CACHE(hostfs_inode_info, 0);
+	hostfs_inode_cache = KMEM_CACHE(hostfs_inode_info, SLAB_MAY_ACCOUNT);
 	if (!hostfs_inode_cache)
 		return -ENOMEM;
 	return register_filesystem(&hostfs_type);

-- 
2.54.0


  parent reply	other threads:[~2026-10-21 11:48 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-21 11:46 [PATCH slab/for-next 00/14] mm/slab: mandate SLAB_MAY_ACCOUNT for __GFP_ACCOUNT allocations to avoid wasting memory for slab metadata Harry Yoo (Meta)
2026-10-21 11:46 ` [PATCH slab/for-next 01/14] mm/slab: allow passing SLAB_MAY_ACCOUNT to kmem_cache_create() Harry Yoo (Meta)
2026-10-21 11:46 ` [PATCH slab/for-next 02/14] lib/maple_tree: specify SLAB_MAY_ACCOUNT for maple_node cache Harry Yoo (Meta)
2026-10-21 11:46 ` [PATCH slab/for-next 03/14] lib/xarray: specify SLAB_MAY_ACCOUNT for radix_tree_node cache Harry Yoo (Meta)
2026-10-21 11:46 ` [PATCH slab/for-next 04/14] fs/buffer: specify SLAB_MAY_ACCOUNT for buffer_head cache Harry Yoo (Meta)
2026-10-21 11:46 ` [PATCH slab/for-next 05/14] net: skbuff: specify SLAB_MAY_ACCOUNT for skbuff_head_cache Harry Yoo (Meta)
2026-10-21 11:46 ` [PATCH slab/for-next 06/14] kernel/fork: specify SLAB_MAY_ACCOUNT for thread_stack cache Harry Yoo (Meta)
2026-10-21 11:46 ` [PATCH slab/for-next 07/14] arm64/mm: specify SLAB_MAY_ACCOUNT for pgd_cache Harry Yoo (Meta)
2026-10-21 11:46 ` [PATCH slab/for-next 08/14] powerpc/mm: specify SLAB_MAY_ACCOUNT for pgtable caches Harry Yoo (Meta)
2026-10-21 11:46 ` [PATCH slab/for-next 09/14] iommu: specify SLAB_MAY_ACCOUNT for slab-backed page table caches Harry Yoo (Meta)
2026-10-21 11:46 ` [PATCH slab/for-next 10/14] fanotify: specify SLAB_MAY_ACCOUNT for event caches Harry Yoo (Meta)
2026-10-21 11:46 ` [PATCH slab/for-next 11/14] smack: specify SLAB_MAY_ACCOUNT for smack_rule cache Harry Yoo (Meta)
2026-10-21 11:46 ` Harry Yoo (Meta) [this message]
2026-10-21 11:46 ` [PATCH slab/for-next 13/14] mm/memcontrol: do not allow charging objects without SLAB_MAY_ACCOUNT Harry Yoo (Meta)
2026-10-21 11:46 ` [PATCH slab/for-next 14/14] mm/slab: do not set SLAB_MAY_ACCOUNT for all caches Harry Yoo (Meta)

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