Date: Fri, 12 Mar 1999 21:35:12 +0100 From: Marcel Moolenaar <marcel@scc.nl> To: Luoqi Chen <luoqi@watermarkgroup.com> Cc: smp@FreeBSD.ORG Subject: SMP vmspace sharing [was: Re: oas fail under smp, work without] Message-ID: <36E97A80.8170F280@scc.nl> References: <199903121655.LAA29937@lor.watermarkgroup.com>
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Hi,
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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