From: ebiederm@xmission.com (Eric W. Biederman)
To: Geoff Levand <geoff@infradead.org>
Cc: panand@redhat.com, kexec@lists.infradead.org,
Simon Horman <horms@verge.net.au>,
Petitboot@lists.ozlabs.org, Dave Young <dyoung@redhat.com>,
vgoyal@redhat.com
Subject: Re: [PATCH] kexec: Add --lite option
Date: Fri, 23 Oct 2015 14:02:34 -0500 [thread overview]
Message-ID: <87d1w52yt1.fsf@x220.int.ebiederm.org> (raw)
In-Reply-To: <1445540240.30908.134.camel@infradead.org> (Geoff Levand's message of "Thu, 22 Oct 2015 11:57:20 -0700")
Geoff Levand <geoff@infradead.org> writes:
>> > It was reported that on some systems where purgatory is running
>> > without caches enabled the sha256 calculations would take several
>> > minutes. For bootloaders that just load a new image and
>> > immediately jump into it the loss of the integrity check is worth
>> > the increase in boot speed. Please consider.
>>
>> Pratyush reported the arm64 issue, he sent a patch to fix it with
>> enabling cache for purgatory. I think the patch can fix the problem.
>> Why not fix it? The fix is simple enough and it does not introduce
>> complicate logic.
>
> This patch also is simple, and is architecture independent. I see this
> feature as an improvement to kexec, not necessarily as a fix for that
> problem.
Disabling image verification is not an improvement, all it does is
allow for a nasty form of heisenbug.
Eric
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next prev parent reply other threads:[~2015-10-23 19:11 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-21 23:12 [PATCH] kexec: Add --lite option Geoff Levand
2015-10-22 0:02 ` Jeremy Kerr
2015-10-22 0:37 ` Geoff Levand
2015-11-05 6:20 ` Scott Wood
2015-10-22 3:17 ` Dave Young
2015-10-22 12:50 ` Vivek Goyal
2015-10-22 19:08 ` Geoff Levand
2015-11-05 5:56 ` Scott Wood
2015-12-07 11:45 ` Pratyush Anand
2015-12-07 11:48 ` Pratyush Anand
2015-12-07 13:16 ` James Morse
2015-12-07 14:07 ` Pratyush Anand
2015-12-08 1:03 ` Scott Wood
2015-12-08 16:00 ` James Morse
2015-12-09 9:28 ` Pratyush Anand
2016-01-11 12:46 ` Pratyush Anand
2016-01-12 1:06 ` Simon Horman
2015-10-22 18:57 ` Geoff Levand
2015-10-22 19:04 ` Vivek Goyal
2015-10-23 9:46 ` Dave Young
2015-10-23 18:49 ` Geoff Levand
2015-10-23 19:02 ` Eric W. Biederman [this message]
2018-04-11 18:30 ` [PATCH v2] kexec: Add --no-checks option Geoff Levand
2018-04-19 8:38 ` Simon Horman
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