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From: Dave Young <dyoung@redhat.com>
To: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Cc: Stewart Smith <stewart@linux.vnet.ibm.com>,
	linuxppc-dev@lists.ozlabs.org, Baoquan He <bhe@redhat.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Balbir Singh <bsingharora@gmail.com>,
	x86@kernel.org, kexec@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	linux-security-module@vger.kernel.org,
	Ingo Molnar <mingo@redhat.com>,
	Eric Richter <erichte@linux.vnet.ibm.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	linux-ima-devel@lists.sourceforge.net,
	Thomas Gleixner <tglx@linutronix.de>,
	Samuel Mendoza-Jonas <sam@mendozajonas.com>,
	Mimi Zohar <zohar@linux.vnet.ibm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Vivek Goyal <vgoyal@redhat.com>,
	Eric Biederman <ebiederm@xmission.com>
Subject: Re: [PATCH v2 3/6] kexec_file: Allow skipping checksum calculation for some segments.
Date: Mon, 22 Aug 2016 11:36:43 +0800	[thread overview]
Message-ID: <20160822033643.GA30937@dhcp-128-65.nay.redhat.com> (raw)
In-Reply-To: <3959832.c4ESAKX1ch@hactar>

On 08/22/16 at 12:25am, Thiago Jung Bauermann wrote:
> Am Montag, 22 August 2016, 11:17:45 schrieb Dave Young:
> > On 08/18/16 at 06:09pm, Thiago Jung Bauermann wrote:
> > > Hello Dave,
> > > 
> > > Thanks for your review!
> > > 
> > > [ Trimming down Cc: list a little to try to clear the "too many
> > > recipients"> 
> > >   mailing list restriction. ]
> > 
> > I also got "too many recipients".. Thanks for the trimming.
> 
> Didn't work though. What is the maximum number of recipients?

I have no idea as well..

> 
> > > Am Donnerstag, 18 August 2016, 17:03:30 schrieb Dave Young:
> > > > On 08/13/16 at 12:18am, Thiago Jung Bauermann wrote:
> > > > > Adds checksum argument to kexec_add_buffer specifying whether the
> > > > > given
> > > > > segment should be part of the checksum calculation.
> > > > 
> > > > Since it is used with add buffer, could it be added to kbuf as a new
> > > > field?
> > > 
> > > I was on the fence about adding it as a new argument to kexec_add_buffer
> > > or as a new field to struct kexec_buf. Both alternatives make sense to
> > > me. I implemented your suggestion in the patch below, what do you
> > > think?> 
> > > > Like kbuf.no_checksum, default value is 0 that means checksum is
> > > > needed
> > > > if it is 1 then no need a checksum.
> > > 
> > > It's an interesting idea and I implemented it that way, though in
> > > practice all current users of struct kexec_buf put it on the stack so
> > > the field needs to be initialized explicitly.
> > 
> > No need to set it as false because it will be initialized to 0 by
> > default?
> 
> As far as I know, variables on the stack are not initialized. Only global 
> and static variables are.

But designated initializers will do it.

Thanks
Dave

  reply	other threads:[~2016-08-22  3:37 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-13  3:18 [PATCH v2 0/6] kexec_file: Add buffer hand-over for the next kernel Thiago Jung Bauermann
2016-08-13  3:18 ` [PATCH v2 1/6] kexec_file: Add buffer hand-over support " Thiago Jung Bauermann
2016-08-13  3:18 ` [PATCH v2 2/6] powerpc: " Thiago Jung Bauermann
2016-08-22  3:21   ` Dave Young
2016-08-22  3:38     ` Thiago Jung Bauermann
2016-08-22  7:22       ` Dave Young
2016-08-22 22:21         ` Thiago Jung Bauermann
2016-08-13  3:18 ` [PATCH v2 3/6] kexec_file: Allow skipping checksum calculation for some segments Thiago Jung Bauermann
2016-08-18  9:03   ` Dave Young
2016-08-18 21:09     ` Thiago Jung Bauermann
2016-08-22  3:17       ` Dave Young
2016-08-22  3:25         ` Thiago Jung Bauermann
2016-08-22  3:36           ` Dave Young [this message]
2016-08-22  3:45             ` Thiago Jung Bauermann
2016-08-22 22:12             ` Thiago Jung Bauermann
2016-08-13  3:18 ` [PATCH v2 4/6] kexec_file: Add mechanism to update kexec segments Thiago Jung Bauermann
2016-08-15 22:27   ` Andrew Morton
2016-08-16 17:00     ` Thiago Jung Bauermann
2016-08-13  3:18 ` [PATCH v2 5/6] kexec: Share logic to copy segment page contents Thiago Jung Bauermann
2016-08-13  3:18 ` [PATCH v2 6/6] IMA: Demonstration code for kexec buffer passing Thiago Jung Bauermann
2016-08-17  2:52 ` [PATCH v2 0/6] kexec_file: Add buffer hand-over for the next kernel Dave Young
2016-08-17  4:58   ` Thiago Jung Bauermann

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