From: Leon Romanovsky <leonro@nvidia.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Xu <peterx@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>, Jason Gunthorpe <jgg@ziepe.ca>,
John Hubbard <jhubbard@nvidia.com>,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>, Yang Shi <shy828301@gmail.com>,
Oleg Nesterov <oleg@redhat.com>,
Kirill Tkhai <ktkhai@virtuozzo.com>,
Kirill Shutemov <kirill@shutemov.name>,
Hugh Dickins <hughd@google.com>, Jann Horn <jannh@google.com>,
Michal Hocko <mhocko@suse.com>, Jan Kara <jack@suse.cz>,
Andrea Arcangeli <aarcange@redhat.com>
Subject: Re: [PATCH v2 0/4] mm: Break COW for pinned pages during fork()
Date: Tue, 29 Sep 2020 14:02:19 +0300 [thread overview]
Message-ID: <20200929110219.GF3094@unreal> (raw)
In-Reply-To: <CAHk-=whWyUg0x72nVQaCjq2xvy=S=x0=_9EuV6Qp4pTarGiaeg@mail.gmail.com>
On Sun, Sep 27, 2020 at 12:35:59PM -0700, Linus Torvalds wrote:
> On Fri, Sep 25, 2020 at 3:26 PM Peter Xu <peterx@redhat.com> wrote:
> >
> > This series is majorly inspired by the previous discussion on the list [1],
> > starting from the report from Jason on the rdma test failure.
>
> Ok, this is now in my git tree with the changes I outlined in the other email.
>
> > I tested it myself with fork() after vfio pinning a bunch of device pages,
>
> .. but _my_ only testing was to just add a nasty hack that said that
> all pages are pinned, and made fork() much slower, but hey, it at
> least tests the preallocation paths etc. And I'm not seeing any
> obvious failures due to taking that slow-path that is supposed to be a
> special case.
>
> Let's hope this closes the rdma issues.
Hi Linus,
We tested your tree upto commit "fb0155a09b02 Merge tag 'nfs-for-5.9-3' of
git://git.linux-nfs.org/projects/trondmy/linux-nfs" and our RDMA tests passed.
Thanks
>
> Linus
prev parent reply other threads:[~2020-09-29 11:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-25 22:25 [PATCH v2 0/4] mm: Break COW for pinned pages during fork() Peter Xu
2020-09-25 22:25 ` [PATCH v2 1/4] mm: Introduce mm_struct.has_pinned Peter Xu
2020-09-25 22:25 ` [PATCH v2 2/4] mm/fork: Pass new vma pointer into copy_page_range() Peter Xu
2020-09-30 13:30 ` Kirill A. Shutemov
2020-09-30 17:05 ` Peter Xu
2020-09-25 22:25 ` [PATCH v2 3/4] mm: Do early cow for pinned pages during fork() for ptes Peter Xu
2020-09-26 23:23 ` Jason Gunthorpe
2020-09-27 0:04 ` Linus Torvalds
2020-09-25 22:26 ` [PATCH v2 4/4] mm/thp: Split huge pmds/puds if they're pinned when fork() Peter Xu
2020-09-27 19:35 ` [PATCH v2 0/4] mm: Break COW for pinned pages during fork() Linus Torvalds
2020-09-29 11:02 ` Leon Romanovsky [this message]
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