Re: raw disks no longer work in latest kvm (kvm-88 was fine)

[Antoine Martin <antoine@xxxxxxxxxxxxx>]

Bump.

Now that qemu is less likely to eat my data, " *[Qemu-devel] [PATCH 4/8] 
block: fix sector comparism in*"
http://marc.info/?l=qemu-devel&m=127436114712437

I thought I would try using the raw 1.5TB partition again with KVM, 
still no go.
I am still having to use:

#undef CONFIG_PREADV

Host and guest kernel version is 2.6.34, headers 2.6.33, glibc 2.10.1-r1
qemu-kvm 0.12.4 + patch above.

Who do I need to bug? glibc? kvm?

Thanks
Antoine


On 04/09/2010 05:00 AM, Antoine Martin wrote:
> Antoine Martin wrote:
>    
> > On 03/08/2010 02:35 AM, Avi Kivity wrote:
> >      
> > > On 03/07/2010 09:25 PM, Antoine Martin wrote:
> > >        
> > > > On 03/08/2010 02:17 AM, Avi Kivity wrote:
> > > >          
> > > > > On 03/07/2010 09:13 PM, Antoine Martin wrote:
> > > > >            
> > > > > > > What version of glibc do you have installed?
> > > > > > >                
> > > > > > Latest stable:
> > > > > > sys-devel/gcc-4.3.4
> > > > > > sys-libs/glibc-2.10.1-r1
> > > > > >
> > > > > >              
> > > > > $ git show glibc-2.10~108 | head
> > > > > commit e109c6124fe121618e42ba882e2a0af6e97b8efc
> > > > > Author: Ulrich Drepper<drepper@xxxxxxxxxx>
> > > > > Date:   Fri Apr 3 19:57:16 2009 +0000
> > > > >
> > > > >      * misc/Makefile (routines): Add preadv, preadv64, pwritev,
> > > > > pwritev64.
> > > > >
> > > > >          * misc/Versions: Export preadv, preadv64, pwritev, pwritev64
> > > > > for
> > > > >          GLIBC_2.10.
> > > > >          * misc/sys/uio.h: Declare preadv, preadv64, pwritev, pwritev64.
> > > > >          * sysdeps/unix/sysv/linux/kernel-features.h: Add entries for
> > > > > preadv
> > > > >
> > > > > You might get away with rebuilding glibc against the 2.6.33 headers.
> > > > >
> > > > >            
> > > > The latest kernel headers available in gentoo (and they're masked
> > > > unstable):
> > > > sys-kernel/linux-headers-2.6.32
> > > >
> > > > So I think I will just keep using Christoph's patch until .33 hits
> > > > portage.
> > > > Unless there's any reason not to? I would rather keep my system "clean".
> > > > I can try it though, if that helps you clear things up?
> > > >          
> > > preadv/pwritev was actually introduced in 2.6.30.  Perhaps you last
> > > build glibc before that?  If so, a rebuild may be all that's necessary.
> > >
> > >        
> > To be certain, I've rebuilt qemu-kvm against:
> > linux-headers-2.6.33 + glibc-2.10.1-r1 (both freshly built)
> > And still no go!
> > I'm still having to use the patch which disables preadv unconditionally...
> >      
> Better late than never, here's the relevant part of the strace (for the
> unpatched case where it fails):
>
> stat("./fs", {st_mode=S_IFBLK|0660, st_rdev=makedev(8, 41), ...}) = 0
> open("./fs", O_RDWR|O_DIRECT|O_CLOEXEC) = 12
>
> lseek(12, 0, SEEK_END)                  = 1321851815424
> [pid 31266] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31266] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31266] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31266] lseek(12, 0, SEEK_SET)      = 0
> [pid 31266] read(12,
> "\240\246E\32\r\21\367c\212\316Xn\177e'\310}\234\1\273`\371\266\247\r\1nj\332\32\221\26"...,
> 512) = 512
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12, "iQ\35
> \271O\203vj\ve[Ni}\355\263\272\4#yMo\266.\341\21\340Y5\204\20"..., 4096,
> 1321851805696) = 4096
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31273] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31271] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31331] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31294] pread(12, "iQ\35
> \271O\203vj\ve[Ni}\355\263\272\4#yMo\266.\341\21\340Y5\204\20"..., 512,
> 1321851805696) = 512
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31298] pread(12,
> "\240\246E\32\r\21\367c\212\316Xn\177e'\310}\234\1\273`\371\266\247\r\1nj\332\32\221\26"...,
> 512, 0) = 512
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31307] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31295] pread(12,
> "\240\246E\32\r\21\367c\212\316Xn\177e'\310}\234\1\273`\371\266\247\r\1nj\332\32\221\26"...,
> 2048, 0) = 2048
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31330] pread(12,
> "=\206\5\355\35\2\2610\33\271\355\300qm\2174K\366\340ng\23\311\210Gg\220m\27\33E\254"...,
> 512, 1321851748352) = 512
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31331] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31294] pread(12,
> "\240\246E\32\r\21\367c\212\316Xn\177e'\310}\234\1\273`\371\266\247\r\1nj\332\32\221\26"...,
> 512, 0) = 512
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
> [pid 31298] pread(12,<unfinished ...>
> [pid 31267] lseek(12, 0, SEEK_END)      = 1321851815424
>
>
>
> Antoine
>
>    
> > Antoine
> > --
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> >      
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>    

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