Re: [PATCH] x86/boot: Support uncompressed kernel

[Michal Marek]

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.

Michal