linux-kernel - Re: [PATCH v4 bpf 2/4] page_alloc: use vmalloc

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Message-ID: <5e5e4759efef83250f9511d4ab0e1ba34f987ce5.camel@fb.com>
Date:   Fri, 15 Apr 2022 17:43:44 +0000
From:   Rik van Riel <riel@...com>
To:     "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "song@...nel.org" <song@...nel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>
CC:     "rick.p.edgecombe@...el.com" <rick.p.edgecombe@...el.com>,
        "hch@....de" <hch@....de>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        "hch@...radead.org" <hch@...radead.org>,
        "mcgrof@...nel.org" <mcgrof@...nel.org>,
        "ast@...nel.org" <ast@...nel.org>,
        Kernel Team <Kernel-team@...com>,
        "imbrenda@...ux.ibm.com" <imbrenda@...ux.ibm.com>
Subject: Re: [PATCH v4 bpf 2/4] page_alloc: use vmalloc_huge for large system
 hash

On Fri, 2022-04-15 at 09:44 -0700, Song Liu wrote:
> Use vmalloc_huge() in alloc_large_system_hash() so that large system
> hash
> (>= PMD_SIZE) could benefit from huge pages. Note that vmalloc_huge
> only
> allocates huge pages for systems with HAVE_ARCH_HUGE_VMALLOC.
> 
> Reviewed-by: Christoph Hellwig <hch@....de>
> Signed-off-by: Song Liu <song@...nel.org>

Reviewed-by: Rik van Riel <riel@...riel.com>