From: sashiko-bot@kernel.org
To: "Jeremy Bongio" <jbongio@google.com>
Cc: linux-rdma@vger.kernel.org
Subject: Re: [PATCH] RDMA/irdma: Use kvzalloc for lvl2 leafmem allocation
Date: Wed, 16 Sep 2026 17:42:13 +0000 [thread overview]
Message-ID: <20260916174213.832221F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260916173203.2555458-1-jbongio@google.com>
> During VM live migration or when registering large memory regions
> (e.g., guest memory >= 256 GB backed by 4 KiB pages), get_lvl2_pble()
> calculates total leaves exceeding ~131,072. The memory required for
> lvl2->leafmem.va exceeds 4 MiB (sizeof(*leaf) * total > 5.24 MiB).
>
> Because kzalloc() requires physically contiguous pages, requests larger
> than MAX_PAGE_ORDER (4 MiB on x86_64) fail and trigger a warning:
>
> WARNING: CPU: 123 PID: 119906 at mm/page_alloc.c:5997 __alloc_frozen_pages_noprof+0x50c/0x1050
> Call Trace:
> <TASK>
> alloc_frozen_pages_noprof+0xc0/0x240
> ___kmalloc_large_node+0x3d/0xd0
> __kmalloc_large_node_noprof+0x1b/0x90
> __kmalloc_noprof+0x254/0x660
> [ ... ]
> virtually contiguous memory via vmalloc.
>
> Fixes: e8c4dbc2fcac ("RDMA/irdma: Add PBLE resource manager")
> Assisted-by: LLM
> Signed-off-by: Jeremy Bongio <jbongio@google.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260916173203.2555458-1-jbongio@google.com?part=1
next prev parent reply other threads:[~2026-09-16 17:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-16 17:32 [PATCH] RDMA/irdma: Use kvzalloc for lvl2 leafmem allocation Jeremy Bongio
2026-09-16 17:42 ` sashiko-bot [this message]
2026-09-16 18:32 ` Jacob Moroni
2026-09-22 14:16 ` Leon Romanovsky
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