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Re: [Qemu-devel] VirtIO 9p mount_tag (bogus?) limit of 32 bytes


From: M. Mohan Kumar
Subject: Re: [Qemu-devel] VirtIO 9p mount_tag (bogus?) limit of 32 bytes
Date: Wed, 07 Mar 2012 21:59:08 +0530
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:9.0) Gecko/20111222 Thunderbird/9.0

Hi Anthony,

When I tried with ldconfig version 2.14.90, ldconfig successfully completed

QEMU version: 1.0.50
Kernel version: 3.3.0-rc6+

Could you please try with recent ldconfig?

On 02/22/2012 09:28 AM, C Anthony Risinger wrote:
On Sat, Feb 18, 2012 at 11:38 AM, Aneesh Kumar K.V
<address@hidden>  wrote:
On Thu, 16 Feb 2012 06:20:21 -0600, C Anthony Risinger<address@hidden>  wrote:
a) mapped FS security policy (xattrs) causes `ldconfig` to abort()?
root or normal user ...

somehow `ldconfig` gets a duplicate inode while constructing the
cache, even though it already de-duped (confirmed via gdb and grep --
only a single abort() in the source)

b) unable to run `locale-gen` on *any* virtfs configuration? (strace)

[...]
mmap(NULL, 536870912, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fb3aac63000
mmap(0x7fb3aac63000, 103860, PROT_READ|PROT_WRITE,
MAP_SHARED|MAP_FIXED, 3, 0) = -1 EINVAL (Invalid argument)
cannot map archive header: Invalid argument

c) package files containing device nodes fail (maybe this is expected
...); specifically `/lib/udev/devices/loop0`

Is this with 9p2000.L ?. What is the guest kernel version ?
(not sure if list will accept this ... too much traffic! had to remove myself)

yes this is with 9p2000.L, both host and guests run kernel 3.2.5.  i'm
happy to provide/try additional information/tests if useful.

... is there really no chance of upping the max path?  seems like
config space will be a big constraint, forever :-(

and i'm very much willing to do additional testing for the other
issues as well (i had to revert to qemu-as-root to get passthru
working 100% on rootfs ... ldconfig is kind of critical :-).  are
these known issues?





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