linux-kernel - Re: [PATCH v3 1/2] mm/vmalloc: add vmalloc_no

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Message-Id: <20210610140909.781959d063608710e24e70c9@linux-foundation.org>
Date:   Thu, 10 Jun 2021 14:09:09 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Claudio Imbrenda <imbrenda@...ux.ibm.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        linux-s390@...r.kernel.org, frankja@...ux.ibm.com,
        borntraeger@...ibm.com, cohuck@...hat.com, david@...hat.com,
        linux-mm@...ck.org, Nicholas Piggin <npiggin@...il.com>,
        Uladzislau Rezki <urezki@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        David Rientjes <rientjes@...gle.com>,
        Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH v3 1/2] mm/vmalloc: add vmalloc_no_huge

On Thu, 10 Jun 2021 17:42:19 +0200 Claudio Imbrenda <imbrenda@...ux.ibm.com> wrote:

> The recent patches to add support for hugepage vmalloc mappings added a
> flag for __vmalloc_node_range to allow to request small pages.
> This flag is not accessible when calling vmalloc, the only option is to
> call directly __vmalloc_node_range, which is not exported.

I can find no patch which adds such a flag to __vmalloc_node_range(). 
I assume you're referring to "mm/vmalloc: switch to bulk allocator in
__vmalloc_area_node()"?

Please be quite specific when identifying patches.  More specific than
"the recent patches"!

Also, it appears from the discussion at
https://lkml.kernel.org/r/YKUWKFyLdqTYliwu@infradead.org that we'll be
seeing a new version of "mm/vmalloc: switch to bulk allocator in
__vmalloc_area_node()".  Would it be better to build these s390 fixes into
the next version of that patch series rather than as a separate
followup thing?