linux-kernel - Re: [PATCH] vmalloc: add __alloc_vm

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Message-ID: <CALCETrWtOcBYdqCY8OgRW8ijNweVcYEvDQ7W63A4m=P=VYdDUw@mail.gmail.com>
Date:   Fri, 6 Oct 2017 16:35:12 -0700
From:   Andy Lutomirski <luto@...nel.org>
To:     Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Cc:     "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andy Lutomirski <luto@...nel.org>
Subject: Re: [PATCH] vmalloc: add __alloc_vm_area() for optimizing vmap stack

On Fri, Oct 6, 2017 at 4:35 AM, Konstantin Khlebnikov
<khlebnikov@...dex-team.ru> wrote:
> This same as __vmalloc_node_range() but returns vm_struct rather than
> virtual address. This allows to kill one call of find_vm_area() for
> each task stack allocation for CONFIG_VMAP_STACK=y.
>
> And fix comment about that task holds cache of vm area: this cache used
> for retrieving actual stack pages, freeing is done by vfree_deferred().

Nice!