From: Paul Burton <paulburton@kernel.org>
To: Guoyun Sun <sunguoyun@loongson.cn>
Cc: Ralf Baechle <ralf@linux-mips.org>,
Paul Burton <paulburton@kernel.org>,
Allison Randal <allison@lohutok.net>,
Thomas Gleixner <tglx@linutronix.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
Guoyun Sun <sunguoyun@loongson.cn>
Cc: linux-mips@vger.kernel.org
Subject: Re: [PATCH V2] mips/vdso: Support mremap() for vDSO
Date: Wed, 15 Jan 2020 10:59:22 -0800 [thread overview]
Message-ID: <5e1f610b.1c69fb81.f82c3.5b13@mx.google.com> (raw)
In-Reply-To: <1579059300-6636-1-git-send-email-sunguoyun@loongson.cn>
Hello,
Guoyun Sun wrote:
> vDSO VMA address is saved in mm_context for the purpose of using
> restorer from vDSO page to return to userspace after signal handling.
>
> In Checkpoint Restore in Userspace (CRIU) project we place vDSO VMA
> on restore back to the place where it was on the dump.
>
> Make vDSO code track the VMA address by supplying .mremap() fops
> the same way it's done for x86 and arm by:
> commit b059a453b1cf ("x86/vdso: Add mremap hook to vm_special_mapping")
> commit 739586951b8a ("arm64/vdso: Support mremap() for vDSO").
Applied to mips-next.
> commit ad1df95419cc
> https://git.kernel.org/mips/c/ad1df95419cc
>
> Signed-off-by: Guoyun Sun <sunguoyun@loongson.cn>
> Signed-off-by: Paul Burton <paulburton@kernel.org>
Thanks,
Paul
[ This message was auto-generated; if you believe anything is incorrect
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prev parent reply other threads:[~2020-01-15 18:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-15 3:35 [PATCH V2] mips/vdso: Support mremap() for vDSO Guoyun Sun
2020-01-15 18:59 ` Paul Burton [this message]
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