linux-kernel - Re: linux acpi (thunderbolt? bug)

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Date:   Wed, 14 Feb 2018 13:09:10 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Yuriy Vostrikov <delamonpansie@...il.com>
cc:     linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: linux acpi (thunderbolt? bug)

On Wed, 14 Feb 2018, Yuriy Vostrikov wrote:
> after boot
> name:   VECTOR
>  size:   0
>  mapped: 64
>  flags:  0x00000041
> Online bitmaps:        2
> Global available:    368
> Global reserved:      26
> Total allocated:      38
> System: 41: 0-19,32,50,128,238-255
>  | CPU | avl | man | act | vectors
>      0   184     1    19  33-49,51-52
>      1   184     1    19  33-49,51-52
> 
> after unplug
> name:   VECTOR
>  size:   0
>  mapped: 55
>  flags:  0x00000041
> Online bitmaps:        2
> Global available:    377
> Global reserved:      26
> Total allocated:      29
> System: 41: 0-19,32,50,128,238-255
>  | CPU | avl | man | act | vectors
>      0   188     1    15  33-46,48
>      1   189     1    14  33-46
> 
> after sleep 1 time
> name:   VECTOR
>  size:   0
>  mapped: 35
>  flags:  0x00000041
> Online bitmaps:        2
> Global available:    385
> Global reserved:      12
> Total allocated:      32
> System: 41: 0-19,32,50,128,238-255
>  | CPU | avl | man | act | vectors
>      0   185     1    18  33-43,46-49,51-53
>      1   200     1     3  33-37

The accounting is already screwed. CPU1 claims to have 3 allocated vectors,
but the allocation bitmap has 5 bits set !?! 

I have no idea yet how that can happen. Lemme stare into the code some more
and I came back to you.

Thanks,

	tglx