From: Hao Li <hao.li@linux.dev>
To: "Vlastimil Babka (SUSE)" <vbabka@kernel.org>
Cc: Harry Yoo <harry@kernel.org>, Christoph Lameter <cl@gentwo.org>,
David Rientjes <rientjes@google.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
Suren Baghdasaryan <surenb@google.com>,
Alexei Starovoitov <ast@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@kernel.org>,
Shakeel Butt <shakeel.butt@linux.dev>,
Alexander Potapenko <glider@google.com>,
Marco Elver <elver@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
kasan-dev@googlegroups.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, cgroups@vger.kernel.org
Subject: Re: [PATCH v3 10/15] mm/slab: allow kmem_cache_alloc_bulk() with any gfp flags
Date: Thu, 18 Jun 2026 16:09:44 +0800 [thread overview]
Message-ID: <ajOns5I57UrExxW6@fedora> (raw)
In-Reply-To: <20260615-slab_alloc_flags-v3-10-ce1146d140fb@kernel.org>
On Mon, Jun 15, 2026 at 01:54:43PM +0200, Vlastimil Babka (SUSE) wrote:
> The last user of gfpflags_allow_spinning() in slab is
> alloc_from_pcs_bulk(), which is only called from
> kmem_cache_alloc_bulk().
>
> It turns out that gfpflags_allow_spinning() is not necessary, because
> kmem_cache_alloc_bulk() is only expected to be called from context that
> does allow spinning, so simply replace it with 'true'. This means we can
> also drop the gfp parameter from alloc_from_pcs_bulk().
>
> With that, we can remove the "@flags must allow spinning" part of the
> kernel doc, as there is no more connection to the gfp flags in the slab
> implementation.
>
> Also remove a comment in alloc_slab_obj_exts() because there should be
> no more false positives possible due to gfp_allowed_mask during early
> boot.
>
> Link: https://patch.msgid.link/20260610-slab_alloc_flags-v2-11-7190909db118@kernel.org
> Reviewed-by: Suren Baghdasaryan <surenb@google.com>
> Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
> ---
Looks good to me.
Reviewed-by: Hao Li <hao.li@linux.dev>
--
Thanks,
Hao
next prev parent reply other threads:[~2026-06-18 8:09 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-15 11:54 [PATCH v3 00/15] mm/slab: introduce alloc_flags and slab_alloc_context Vlastimil Babka (SUSE)
2026-06-15 11:54 ` [PATCH v3 01/15] mm/slab: do not init any kfence objects on allocation Vlastimil Babka (SUSE)
2026-06-17 2:44 ` Hao Li
2026-06-17 11:52 ` Marco Elver
2026-06-15 11:54 ` [PATCH v3 02/15] mm/slab: stop inlining __slab_alloc_node() Vlastimil Babka (SUSE)
2026-06-15 11:54 ` [PATCH v3 03/15] mm/slab: introduce slab_alloc_context Vlastimil Babka (SUSE)
2026-06-17 2:52 ` Hao Li
2026-06-15 11:54 ` [PATCH v3 04/15] mm/slab: introduce alloc_flags and SLAB_ALLOC_NOLOCK Vlastimil Babka (SUSE)
2026-06-15 11:54 ` [PATCH v3 05/15] mm/slab: replace struct partial_context with slab_alloc_context Vlastimil Babka (SUSE)
2026-06-15 11:54 ` [PATCH v3 06/15] mm/slab: add alloc_flags to slab_alloc_context Vlastimil Babka (SUSE)
2026-06-17 14:40 ` Suren Baghdasaryan
2026-06-15 11:54 ` [PATCH v3 07/15] mm/slab: pass alloc_flags to new slab allocation Vlastimil Babka (SUSE)
2026-06-16 7:07 ` Harry Yoo
2026-06-15 11:54 ` [PATCH v3 08/15] mm/slab: pass alloc_flags through slab_post_alloc_hook() chain Vlastimil Babka (SUSE)
2026-06-16 7:36 ` Harry Yoo
2026-06-17 14:48 ` Suren Baghdasaryan
2026-06-18 8:07 ` Hao Li
2026-06-15 11:54 ` [PATCH v3 09/15] mm/slab: replace slab_alloc_node() parameters with slab_alloc_context Vlastimil Babka (SUSE)
2026-06-17 9:24 ` Harry Yoo
2026-06-15 11:54 ` [PATCH v3 10/15] mm/slab: allow kmem_cache_alloc_bulk() with any gfp flags Vlastimil Babka (SUSE)
2026-06-17 9:28 ` Harry Yoo
2026-06-18 8:09 ` Hao Li [this message]
2026-06-15 11:54 ` [PATCH v3 11/15] mm/slab: pass slab_alloc_context to __do_kmalloc_node() Vlastimil Babka (SUSE)
2026-06-17 9:36 ` Harry Yoo
2026-06-17 14:52 ` Suren Baghdasaryan
2026-06-15 11:54 ` [PATCH v3 12/15] mm/slab: allow __GFP_NOMEMALLOC and __GFP_NOWARN for kmalloc_nolock() Vlastimil Babka (SUSE)
2026-06-17 9:41 ` Harry Yoo
2026-06-15 11:54 ` [PATCH v3 13/15] mm/slab: introduce kmalloc_flags() Vlastimil Babka (SUSE)
2026-06-17 11:16 ` Harry Yoo
2026-06-15 11:54 ` [PATCH v3 14/15] mm/slab: remove __GFP_NO_OBJ_EXT usage from alloc_slab_obj_exts() Vlastimil Babka (SUSE)
2026-06-17 13:56 ` Harry Yoo
2026-06-17 14:36 ` Vlastimil Babka (SUSE)
2026-06-17 14:40 ` Harry Yoo
2026-06-17 14:56 ` Vlastimil Babka (SUSE)
2026-06-17 15:08 ` Suren Baghdasaryan
2026-06-18 8:23 ` Hao Li
2026-06-15 11:54 ` [PATCH v3 15/15] mm/slab: replace __GFP_NO_OBJ_EXT with SLAB_ALLOC_NO_RECURSE for sheaves Vlastimil Babka (SUSE)
2026-06-17 14:36 ` Harry Yoo
2026-06-17 15:10 ` Suren Baghdasaryan
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