[openib-general] Re: mstflint - test1

[Tom Duffy]

On Wed, 2005-01-12 at 12:51 +0200, Michael S. Tsirkin wrote:
> OK.
> Tom, here's a simple test.
> After this we will know for sure whether mmap works, or not.
> I hard-coded the physical memory offset to
> 1ff00100000 (this seems to be what you have), you can find out the real offset
> for the first resource from lspci -vv or from cat /proc/iomem.
> 
> You have to be root to run.

Bummer...

Bus error (core dumped)

tat:~# strace ./mstflint-test
execve("./mstflint-test", ["./mstflint-test"], [/* 14 vars */]) = 0
uname({sys="Linux", node="tat", ...})   = 0
brk(0)                                  = 0x22000
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.preload", O_RDONLY)    = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=53602, ...}) = 0
mmap(NULL, 53602, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7002c000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\2\0\0\0\1\0\1\316"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=1291948, ...}) = 0
mmap(NULL, 1361864, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x7003c000
mprotect(0x70170000, 100296, PROT_NONE) = 0
mmap(0x7017c000, 49152, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0x130000) = 0x7017c000
mmap(0x70188000, 1992, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x70188000
close(3)                                = 0
munmap(0x7002c000, 53602)               = 0
open("/dev/mem", O_RDWR|O_SYNC|O_LARGEFILE) = 3
mmap2(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0x1ff00100) = 0x7018c000
--- SIGBUS (Bus error) @ 0 (0) ---

I added a sleep right after mmap so I could look at the proc maps, and
this is what I saw:

tat:~# cat /proc/7234/maps
00010000-00012000 r-xp 00000000 08:01 749542                             /root/mstflint-test
00020000-00022000 rwxp 00000000 08:01 749542                             /root/mstflint-test
70000000-7001a000 r-xp 00000000 08:01 700792                             /lib/ld-2.3.2.so
70028000-7002a000 rwxp 00018000 08:01 700792                             /lib/ld-2.3.2.so
7003c000-70170000 r-xp 00000000 08:01 700795                             /lib/libc-2.3.2.so
70170000-7017c000 ---p 00134000 08:01 700795                             /lib/libc-2.3.2.so
7017c000-70188000 rwxp 00130000 08:01 700795                             /lib/libc-2.3.2.so
70188000-7018a000 rwxp 70188000 00:00 0
7018c000-7028c000 rw-s 1ff00100000 00:0d 316                             /dev/mem
efffe000-f0000000 rw-p efffe000 00:00 0

If there is a problem with mmap(/dev/mem), I will see if anybody has a
clue on sparclinux at vger.

-tduffy
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
URL: <http://lists.openfabrics.org/pipermail/general/attachments/20050112/65ae79c6/attachment.sig>