From: Pratyush Yadav <pratyush@kernel.org>
To: Michal Clapinski <mclapinski@google.com>
Cc: Evangelos Petrongonas <epetron@amazon.de>,
Pasha Tatashin <pasha.tatashin@soleen.com>,
Mike Rapoport <rppt@kernel.org>,
Pratyush Yadav <pratyush@kernel.org>,
Alexander Graf <graf@amazon.com>,
Samiullah Khawaja <skhawaja@google.com>,
kexec@lists.infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>,
Brendan Jackman <jackmanb@google.com>,
Johannes Weiner <hannes@cmpxchg.org>, Zi Yan <ziy@nvidia.com>
Subject: Re: [PATCH v9 1/3] kho: fix deferred initialization of scratch areas
Date: Thu, 23 Apr 2026 18:43:04 +0200 [thread overview]
Message-ID: <2vxzmryt631j.fsf@kernel.org> (raw)
In-Reply-To: <20260423122538.140993-2-mclapinski@google.com> (Michal Clapinski's message of "Thu, 23 Apr 2026 14:25:36 +0200")
On Thu, Apr 23 2026, Michal Clapinski wrote:
> Currently, if CONFIG_DEFERRED_STRUCT_PAGE_INIT is enabled,
> kho_release_scratch() will initialize the struct pages and set migratetype
> of KHO scratch. Unless the whole scratch fits below first_deferred_pfn,
> some of that will be overwritten either by deferred_init_pages() or
> memmap_init_reserved_range().
>
> To fix it, make memmap_init_range(), deferred_init_memmap_chunk() and
> __init_page_from_nid() recognize KHO scratch regions and set
> migratetype of pageblocks in those regions to MIGRATE_CMA.
>
> Co-developed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
> Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
> Signed-off-by: Michal Clapinski <mclapinski@google.com>
Reviewed-by: Pratyush Yadav (Google) <pratyush@kernel.org>
[...]
--
Regards,
Pratyush Yadav
next prev parent reply other threads:[~2026-04-23 16:43 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-23 12:25 [PATCH v9 0/3] kho: add support for deferred struct page init Michal Clapinski
2026-04-23 12:25 ` [PATCH v9 1/3] kho: fix deferred initialization of scratch areas Michal Clapinski
2026-04-23 16:43 ` Pratyush Yadav [this message]
2026-04-23 17:42 ` Pasha Tatashin
2026-04-23 12:25 ` [PATCH v9 2/3] kho: make preserved pages compatible with deferred struct page init Michal Clapinski
2026-04-23 12:25 ` [PATCH v9 3/3] selftests: kho: test " Michal Clapinski
2026-04-23 16:43 ` Pratyush Yadav
2026-04-23 17:44 ` Pasha Tatashin
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