From owner-freebsd-smp  Fri Mar 12 14:48:53 1999
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Date: Fri, 12 Mar 1999 17:47:59 -0500 (EST)
From: Luoqi Chen <luoqi@watermarkgroup.com>
Message-Id: <199903122247.RAA02336@lor.watermarkgroup.com>
To: marcel@scc.nl
Subject: Re:  SMP vmspace sharing [was: Re: oas fail under smp, work without]
Cc: smp@FreeBSD.ORG
Sender: owner-freebsd-smp@FreeBSD.ORG
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X-Loop: FreeBSD.org

Did you recompile linux module? brk can't be at 0xf0b53b54, that's in
kernel address space. I can run linux bash just fine, but truss output
didn't show any brk(0) call, so I may be using a different version of
bash (the one comes with linux-lib 2.6 port).

-lq

> 
> Applying luoqi's patches results in a different behavior for the linux_brk
> syscall. This breaks Linux bash.
> 
> a -current system without the patches produces the following ktrace:
> 
>    ...
>    555 bash     CALL  getegid
>    555 bash     RET   getegid 1000/0x3e8
>    555 bash     CALL  linux_brk(0)
>    555 bash     RET   linux_brk 134873088/0x80a0000
>    555 bash     CALL  linux_brk(0x80a0030)
>    555 bash     RET   linux_brk 134873136/0x80a0030
>    555 bash     CALL  linux_brk(0x80a1000)
>    555 bash     RET   linux_brk 134877184/0x80a1000
>    555 bash     CALL  linux_time(0)
>    555 bash     RET   linux_time 921267035/0x36e96b5b
>    ...
> 
> After applying the patches, the following ktrace is produced:
> 
>    ...
>   2993 bash     CALL  getegid
>   2993 bash     RET   getegid 0
>   2993 bash     CALL  linux_brk(0)
>   2993 bash     RET   linux_brk -256558252/0xf0b53b54
>   2993 bash     CALL  linux_brk(0xf0b53b84)
>   2993 bash     RET   linux_brk -256558252/0xf0b53b54
>   2993 bash     CALL  write(0x2,0xefbfb1ac,0x6)
>   2993 bash     GIO   fd 2 wrote 6 bytes
>        "bash: "
>   2993 bash     RET   write 6
>   2993 bash     CALL  write(0x2,0xefbfb1c4,0x16)
>   2993 bash     GIO   fd 2 wrote 22 bytes
>        "Out of virtual memory!"
>   2993 bash     RET   write 22/0x16
>    ...
> 
> marcel
> 


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