From: Pavel Tatashin <pasha.tatashin@soleen.com>
To: James Morse <james.morse@arm.com>
Cc: Sasha Levin <sashal@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Vladimir Murzin <vladimir.murzin@arm.com>,
Jonathan Corbet <corbet@lwn.net>,
Marc Zyngier <marc.zyngier@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Bhupesh Sharma <bhsharma@redhat.com>,
kexec mailing list <kexec@lists.infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
James Morris <jmorris@namei.org>, linux-mm <linux-mm@kvack.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
will@kernel.org, Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v3 02/17] arm64, hibernate: use get_safe_page directly
Date: Fri, 6 Sep 2019 11:39:58 -0400 [thread overview]
Message-ID: <CA+CK2bBgUH8v_bYEyJKPsLZFDxse6xYRwGR8KN=SzgHnrR9yhA@mail.gmail.com> (raw)
In-Reply-To: <dc6506a0-9b66-f633-8319-9c8a9dc93d4f@arm.com>
On Fri, Sep 6, 2019 at 11:17 AM James Morse <james.morse@arm.com> wrote:
>
> Hi Pavel,
>
> Nit: The pattern for the subject prefix should be "arm64: hibernate:"..
> Its usually possible to spot the pattern from "git log --oneline $file".
Sure, I will change here and in other places to "arm64: hibernate:"
>
> On 21/08/2019 19:31, Pavel Tatashin wrote:
> > create_safe_exec_page is a local function that uses the
> > get_safe_page() to allocate page table and pages and one pages
> > that is getting mapped.
>
> I can't parse this.
>
> create_safe_exec_page() uses hibernate's allocator to create a set of page table to map a
> single page that will contain the relocation code.
Thanks I will rephrase it with your suggestion.
>
>
> > Remove the allocator related arguments, and use get_safe_page
> > directly, as it is done in other local functions in this
> > file.
> ... because kexec can't use this as it doesn't have a working allocator.
> Removing this function pointer makes it easier to refactor the code later.
Thanks, I will add it to the description.
>
> (this thing is only a function pointer so kexec could use it too ... It looks like you're
> creating extra work. Patch 7 moves these new calls out to a new file... presumably so
> another patch can remove them again)
>
> As stand-alone cleanup the patch looks fine, but you probably don't need to do this.
Without this clean-up moving to common code becomes messier. So, I
would like to keep this change.
Thank you,
Pasha
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next prev parent reply other threads:[~2019-09-06 15:40 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-21 18:31 [PATCH v3 00/17] arm64: MMU enabled kexec relocation Pavel Tatashin
2019-08-21 18:31 ` [PATCH v3 01/17] kexec: quiet down kexec reboot Pavel Tatashin
2019-09-06 15:17 ` James Morse
2019-09-06 15:35 ` Pavel Tatashin
2019-08-21 18:31 ` [PATCH v3 02/17] arm64, hibernate: use get_safe_page directly Pavel Tatashin
2019-09-06 15:17 ` James Morse
2019-09-06 15:39 ` Pavel Tatashin [this message]
2019-08-21 18:31 ` [PATCH v3 03/17] arm64, hibernate: remove gotos in create_safe_exec_page Pavel Tatashin
2019-09-06 15:17 ` James Morse
2019-09-06 15:41 ` Pavel Tatashin
2019-08-21 18:31 ` [PATCH v3 04/17] arm64, hibernate: rename dst to page " Pavel Tatashin
2019-09-06 15:17 ` James Morse
2019-09-06 15:41 ` Pavel Tatashin
2019-08-21 18:31 ` [PATCH v3 05/17] arm64, hibernate: check pgd table allocation Pavel Tatashin
2019-09-06 15:17 ` James Morse
2019-09-06 15:44 ` Pavel Tatashin
2019-08-21 18:31 ` [PATCH v3 06/17] arm64, hibernate: add trans_pgd public functions Pavel Tatashin
2019-09-06 15:18 ` James Morse
2019-09-06 16:00 ` Pavel Tatashin
2019-10-11 18:16 ` James Morse
2019-08-21 18:31 ` [PATCH v3 07/17] arm64, hibernate: move page handling function to new trans_pgd.c Pavel Tatashin
2019-09-06 15:18 ` James Morse
2019-09-06 17:41 ` Pavel Tatashin
2019-08-21 18:31 ` [PATCH v3 08/17] arm64, trans_pgd: make trans_pgd_map_page generic Pavel Tatashin
2019-09-06 15:20 ` James Morse
2019-09-06 18:58 ` Pavel Tatashin
2019-10-11 18:15 ` James Morse
2019-08-21 18:31 ` [PATCH v3 09/17] arm64, trans_pgd: add trans_pgd_create_empty Pavel Tatashin
2019-09-06 15:20 ` James Morse
2019-09-06 19:00 ` Pavel Tatashin
2019-08-21 18:31 ` [PATCH v3 10/17] arm64, trans_pgd: adjust trans_pgd_create_copy interface Pavel Tatashin
2019-09-06 15:20 ` James Morse
2019-09-06 19:03 ` Pavel Tatashin
2019-08-21 18:31 ` [PATCH v3 11/17] arm64, trans_pgd: add PUD_SECT_RDONLY Pavel Tatashin
2019-09-06 15:21 ` James Morse
2019-09-06 19:04 ` Pavel Tatashin
2019-08-21 18:31 ` [PATCH v3 12/17] arm64, trans_pgd: complete generalization of trans_pgds Pavel Tatashin
2019-09-06 15:23 ` James Morse
2019-09-06 19:06 ` Pavel Tatashin
2019-08-21 18:32 ` [PATCH v3 13/17] kexec: add machine_kexec_post_load() Pavel Tatashin
2019-08-21 18:32 ` [PATCH v3 14/17] arm64, kexec: move relocation function setup and clean up Pavel Tatashin
2019-08-21 18:32 ` [PATCH v3 15/17] arm64, kexec: add expandable argument to relocation function Pavel Tatashin
2019-08-21 18:32 ` [PATCH v3 16/17] arm64, kexec: configure trans_pgd page table for kexec Pavel Tatashin
2019-08-21 18:32 ` [PATCH v3 17/17] arm64, kexec: enable MMU during kexec relocation Pavel Tatashin
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