linux-kernel - Re: [RFC] reduce latency in __purge_vmap_area

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Message-ID: <CAJWu+opqM8Skgkn0BYR7=kAY8YrHcY+9Ag49nZNEHnmdij8BZw@mail.gmail.com>
Date:   Thu, 20 Oct 2016 18:08:46 -0700
From:   Joel Fernandes <joelaf@...gle.com>
To:     Christoph Hellwig <hch@....de>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Jisheng Zhang <jszhang@...vell.com>,
        Chris Wilson <chris@...is-wilson.co.uk>,
        John Dias <joaodias@...gle.com>,
        "open list:MEMORY MANAGEMENT" <linux-mm@...ck.org>,
        linux-rt-users@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] reduce latency in __purge_vmap_area_lazy

On Mon, Oct 17, 2016 at 11:56 PM, Christoph Hellwig <hch@....de> wrote:
> Hi all,
>
> this is my spin at sorting out the long lock hold times in
> __purge_vmap_area_lazy.  It is based on the patch from Joel sent this
> week.  I don't have any good numbers for it, but it survived an
> xfstests run on XFS which is a significant vmalloc user.  The
> changelogs could still be improved as well, but I'd rather get it
> out quickly for feedback and testing.

All patches look great to me, and thanks a lot.

Regards,
Joel