From: Usama Arif <usama.arif@linux.dev>
To: Nico Pache <npache@redhat.com>
Cc: Usama Arif <usama.arif@linux.dev>,
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Subject: Re: [PATCH mm-unstable v15 12/13] mm/khugepaged: run khugepaged for all orders
Date: Thu, 26 Feb 2026 07:53:31 -0800 [thread overview]
Message-ID: <20260226155334.3373953-1-usama.arif@linux.dev> (raw)
In-Reply-To: <20260226032650.234386-1-npache@redhat.com>
On Wed, 25 Feb 2026 20:26:50 -0700 Nico Pache <npache@redhat.com> wrote:
> From: Baolin Wang <baolin.wang@linux.alibaba.com>
>
> If any order (m)THP is enabled we should allow running khugepaged to
> attempt scanning and collapsing mTHPs. In order for khugepaged to operate
> when only mTHP sizes are specified in sysfs, we must modify the predicate
> function that determines whether it ought to run to do so.
>
> This function is currently called hugepage_pmd_enabled(), this patch
> renames it to hugepage_enabled() and updates the logic to check to
> determine whether any valid orders may exist which would justify
> khugepaged running.
>
> We must also update collapse_allowable_orders() to check all orders if
> the vma is anonymous and the collapse is khugepaged.
>
> After this patch khugepaged mTHP collapse is fully enabled.
>
> Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
> Signed-off-by: Nico Pache <npache@redhat.com>
> ---
> mm/khugepaged.c | 30 ++++++++++++++++++------------
> 1 file changed, 18 insertions(+), 12 deletions(-)
>
Acked-by: Usama Arif <usama.arif@linux.dev>
next prev parent reply other threads:[~2026-02-26 15:53 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-26 3:17 [PATCH mm-unstable v15 00/13] khugepaged: mTHP support Nico Pache
2026-02-26 3:22 ` [PATCH mm-unstable v15 01/13] mm/khugepaged: generalize hugepage_vma_revalidate for " Nico Pache
2026-02-26 3:23 ` [PATCH mm-unstable v15 02/13] mm/khugepaged: generalize alloc_charge_folio() Nico Pache
2026-02-26 3:23 ` [PATCH mm-unstable v15 03/13] mm/khugepaged: generalize __collapse_huge_page_* for mTHP support Nico Pache
2026-02-26 3:24 ` [PATCH mm-unstable v15 04/13] mm/khugepaged: introduce collapse_max_ptes_none helper function Nico Pache
2026-02-26 3:24 ` [PATCH mm-unstable v15 05/13] mm/khugepaged: generalize collapse_huge_page for mTHP collapse Nico Pache
2026-02-26 3:24 ` [PATCH mm-unstable v15 06/13] mm/khugepaged: skip collapsing mTHP to smaller orders Nico Pache
2026-02-26 3:25 ` [PATCH mm-unstable v15 07/13] mm/khugepaged: add per-order mTHP collapse failure statistics Nico Pache
2026-02-26 3:25 ` [PATCH mm-unstable v15 08/13] mm/khugepaged: improve tracepoints for mTHP orders Nico Pache
2026-02-26 3:25 ` [PATCH mm-unstable v15 09/13] mm/khugepaged: introduce collapse_allowable_orders helper function Nico Pache
2026-02-26 3:26 ` [PATCH mm-unstable v15 10/13] mm/khugepaged: Introduce mTHP collapse support Nico Pache
2026-02-26 3:26 ` [PATCH mm-unstable v15 11/13] mm/khugepaged: avoid unnecessary mTHP collapse attempts Nico Pache
2026-02-26 16:26 ` Usama Arif
2026-02-26 3:26 ` [PATCH mm-unstable v15 12/13] mm/khugepaged: run khugepaged for all orders Nico Pache
2026-02-26 15:53 ` Usama Arif [this message]
2026-02-26 3:27 ` [PATCH mm-unstable v15 13/13] Documentation: mm: update the admin guide for mTHP collapse Nico Pache
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