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Groups > linux.kernel > #1609828
| From | Arnd Bergmann <arnd@arndb.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH] x86/boot: Support uncompressed kernel |
| Date | 2017-03-27 15:30 +0200 |
| Message-ID | <tpCSB-hj-9@gated-at.bofh.it> (permalink) |
| References | (1 earlier) <tocxd-3SR-53@gated-at.bofh.it> <tod0e-4a5-21@gated-at.bofh.it> <toq77-5eW-3@gated-at.bofh.it> <tpxSW-4Xx-17@gated-at.bofh.it> <tpBtw-7vp-25@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, Mar 27, 2017 at 1:47 PM, Michal Marek <mmarek@suse.com> wrote:
> Dne 27.3.2017 v 09:58 Sebastian Andrzej Siewior napsal(a):
>> On 2017-03-24 13:35:40 [+0800], Chao Peng wrote:
>>>
>>>>>> kernel kernel size time in decompress_kernel
>>>>>> compressed (gzip) 3.3M 53ms
>>>>>> uncompressed 14M 3ms
>>>>>
>>> Exactly, LZ4 is the fastest. It takes 16ms to complete the
>>> decompression. Still sounds a little longer when compared to
>>> uncompressed kernel.
>>
>> Are we seriously talking here about one-time improvement of 13ms
>> boot time?
>
> If the use case is launching new VM instances continuously, then
> compressing the kernel image is about as useful as compressing /bin/bash.
I guess the next step would be to use CONFIG_XIP_KERNEL on x86,
which requires an uncompressed kernel but has the additional advantage
of sharing the read-only sections of the kernel image across virtual
machines, resulting in better RAM and cache usage.
Arnd
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[PATCH] x86/boot: Support uncompressed kernel Chao Peng <chao.p.peng@linux.intel.com> - 2017-03-23 14:10 +0100
Re: [PATCH] x86/boot: Support uncompressed kernel Yinghai Lu <yinghai@kernel.org> - 2017-03-23 16:10 +0100
Re: [PATCH] x86/boot: Support uncompressed kernel Sergey Senozhatsky <sergey.senozhatsky@gmail.com> - 2017-03-23 16:40 +0100
Re: [PATCH] x86/boot: Support uncompressed kernel Chao Peng <chao.p.peng@linux.intel.com> - 2017-03-24 06:40 +0100
Re: [PATCH] x86/boot: Support uncompressed kernel Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2017-03-27 10:10 +0200
Re: [PATCH] x86/boot: Support uncompressed kernel Chao Peng <chao.p.peng@linux.intel.com> - 2017-03-27 11:30 +0200
Re: [PATCH] x86/boot: Support uncompressed kernel Michal Marek <mmarek@suse.com> - 2017-03-27 14:00 +0200
Re: [PATCH] x86/boot: Support uncompressed kernel Arnd Bergmann <arnd@arndb.de> - 2017-03-27 15:30 +0200
Re: [PATCH] x86/boot: Support uncompressed kernel Chao Peng <chao.p.peng@linux.intel.com> - 2017-03-28 14:10 +0200
Re: [PATCH] x86/boot: Support uncompressed kernel "H. Peter Anvin" <hpa@zytor.com> - 2017-03-29 01:00 +0200
Re: [PATCH] x86/boot: Support uncompressed kernel Andy Lutomirski <luto@amacapital.net> - 2017-03-29 01:00 +0200
Re: [PATCH] x86/boot: Support uncompressed kernel Michal Marek <mmarek@suse.com> - 2017-03-24 09:30 +0100
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