; (gdb) bt
> [showing the trace I've already sent in the other mail]
>
> Maybe there are "other outputs" apart of the output that the ./linux
> produces which could be causing the problem?
Please try logging in via SSH and reproducing the problem and the stacktrace,
an
gh I'm the
> VNUML main developers, much of the UML technology stills being a mystery
> to me, specially the pieces that lay in the kernel space). Are you
> thinking in a particular idea/plan/issue? Maybe having a look to VNUML
> as I suggest above may help to get an idea of wha
On martedì 11 settembre 2007, Jeff Dike wrote:
> On Tue, Sep 11, 2007 at 04:00:58PM +0200, Blaisorblade wrote:
> > errno = 24 means EMFILE (too many open files).
>
> Whoops, I mentally turned that into -ENOMEM.
>
> Maybe we should resurrect os_print_error as you suggested
isual Studio 2005.
> http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/
SourceForge has not implemented AdSense at all, it seems...
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and by module
support, and that I've learnt this while we debugged some very old vmalloc
bug (I may be talking of 2.4.20). I've not had the time to look at that
report, but does what I say make sense to you?
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er, not to simplify it for users).
Btw, the inlined abs() call is not very nice; on the other hand, it's a simple
solution to make it robust, and we do not to be extra-optimal on these debug
code paths.
Bye
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On venerdì 24 agosto 2007, Jeff Dike wrote:
> On Thu, Aug 23, 2007 at 04:54:59PM +0200, Blaisorblade wrote:
> > > actually. Personally I'd prefer:
> > >
> > > else
> > > type = OS_TYPE_DIR;
> >
> > I strongly agree with this s
Personally I'd prefer:
>
> else
> type = OS_TYPE_DIR;
I strongly agree with this style; beyond style itself, one strong reason is
that joining statements hinder singlestepping through function code (it's
easy to run gdb on UML, and anyway kgdb exists).
Bye
On mercoledì 22 agosto 2007, Jeff Dike wrote:
> On Tue, Aug 21, 2007 at 07:05:53PM +0200, Blaisorblade wrote:
> > It's not the first time we hit effects of such bugs, is it?
>
> I don't remember seeing this before.
>
> > The .note.ABI-tag fix, time ago, may be a
d for host headers) - at least
that's what I think (I've never asked to Jeff, but I silently deduced this
and followed this practice).
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}
>
> Ooh, this sounds promising, thanks.
It's not the first time we hit effects of such bugs, is it? The .note.ABI-tag
fix, time ago, may be about the same problem. Can you double-check all UML
linker scripts for more instances of this bug?
Bye
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quot; (cit.), I've made another another mistake!
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signature.asc
Description: This is a digitally signed message part.
--
er case, it may
even not compile successfully).
If you add a breakpoint on securityfs_create_dir and singlestep to look at
what happens (which you should do), you'll probably see that a bit after the
breakpoint gdb shows the correct value (it often does not at breakpoint's
time),
sprintf() because it
used 32K of stack.
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On mercoledì 20 giugno 2007, Jeff Dike wrote:
> On Wed, Jun 20, 2007 at 04:06:58PM +0200, Blaisorblade wrote:
> > Oh, it's exactly what CONFIG_DEBUG_STACK_USAGE does for i386... (not sure
> > if you were still wondering...).
>
> Where? The only usage in i386 that I se
neric, utilising the
> stack-page-zeroing which CONFIG_DEBUG_STACK_USAGE enables. There's nothing
> UML-specific about it.
> low_water_lock and lowest_to_date should be static to check_stack_usage(),
> btw..
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er this thursday (i.e. tomorrow). I'd need to get
Jeff's patchset to fix it.
Please let me know.
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do-src-style-fix
Description: applica
hanks,
> Mark
You can test if it works, but I believe that UML serial driver does not
implement many of the ioctl's needed for a proper serial port, so it's
difficult it will work.
Bye
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gt; The trivial attached patch fixes this.
>
> -Nicolas Dade
Acked-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
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le I assume you are _STILL_ using a 2.4 UML
kernel, right?
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t kernel.
There are. Go to this page:
http://user-mode-linux.sourceforge.net/
and look for "debugging" in _that_ page. Then follow the "debugging in SKAS
mode".
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On sabato 12 maggio 2007, David Rientjes wrote:
> Use the newly introduced __used attribute in place of the deprecated
> __attribute_used__. Functionally the same.
>
> Signed-off-by: David Rientjes <[EMAIL PROTECTED]>
Acked-by: Paolo 'Blaisorblade' Giarrusso <[EMAI
).
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/tmpfs filesystem (which is
backed by ram), that's an almost normal behaviour, and can happen even on
host systems.
> thanx for any reply,
> Herbert
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unno about other distributions.
If there are so many interfaces and they were just reordered, this could be
caused by a (non-existant) change in link order. Or (I don't know how) it
could derive some way from the fact that interfaces are initialized later
(instead of __initcall, late_ini
return(-errno);
> + } else if(utime(file, &buf) != 0){
> return(-errno);
> + }
> }
> }
> if(attrs->ia_valid & HOSTFS_ATTR_CTIME) ;
> if(attrs->ia_valid & (HOSTFS_ATTR_ATIM
rn unsigned long stack_sp(unsigned long page);
> +#endif
> extern int kernel_thread_proc(void *data);
> extern void syscall_segv(int sig);
> extern int current_pid(void);
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browser image (running IE via wine in a limited image
> with just X + wine + IE - I would much prefer that to having wine+IE
> installed locally), testing framebuffer apps like gtk-fb/cairo-fb
> without risking your dev environment, etc...
>
> Antoine
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hot is a faster COW? Something to setup it automatically would be
good).
There would be more to say on this, but I can't right now (I've other stuff to
do).
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Have you got sick of fixing your sources CodingStyle by hand? Are you
reintroducing violations because you've always programmed in a certain style
and those kernel hacker have dictated an insane one which you'll never learn?
Stop that, the spamful company "BlaisorBlade Inc.
On giovedì 29 marzo 2007, Jeff Dike wrote:
> On Thu, Mar 29, 2007 at 02:36:43AM +0200, Blaisorblade wrote:
> > > Sometimes you need to. I'd probably just remove the do_ubd check and
> > > always recall the request function when handling completions, it's
&g
e = .;
>__ex_table : { *(__ex_table) }
>__stop___ex_table = .;
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T
There was a typo in commit 7632fc8f809a97f9d82ce125e8e3e579390ce2e5, preventing
it from working - 32bit binaries crashed hopelessly before the below fix and
work perfectly now.
Merge for 2.6.21, please.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
---
On venerdì 30 marzo 2007, Jeff Dike wrote:
> From: Davide Brini <[EMAIL PROTECTED]>
>
> Calls lines_init() *after* xterm_title is modified to include umid.
>
> Signed-off-by: Davide Brini <[EMAIL PROTECTED]>
> Signed-off-by: Jeff Dike <[EMAIL PROTECTED]>
Acke
force_sig(SIGKILL, current);
> + }
> +
> switch_mm_skas(¤t->mm->context.skas.id);
> }
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Index: linux-2.6.git/arch/um/include/sk
to look at it, since it's deleted? Uml has mapped the whole of it,
starting from the address stored in uml_physmem onwards.
So in gdb I must just look (with the 'x' or 'disassemble' command) to
uml_physmem + 0x03fb4000 + 0x12.
These are the basi
On giovedì 29 marzo 2007, Jeff Dike wrote:
> On Thu, Mar 29, 2007 at 02:36:43AM +0200, Blaisorblade wrote:
> > > Sometimes you need to. I'd probably just remove the do_ubd check and
> > > always recall the request function when handling completions, it's
&g
On giovedì 29 marzo 2007, Blaisorblade wrote:
> On mercoledì 28 marzo 2007, Jeff Dike wrote:
> > [ This patch needs to get into 2.6.21, as it fixes a serious bug
> > introduced soon after 2.6.20 ]
> >
> > Commit 62f96cb01e8de7a5daee472e540f726db2801499 introduced per-d
ike 150 Mbit/s - 100 Mbit/s, depending
whether UML trasmits or receives data; with 2GHz double rates).
Update: I now get 150Mbit / 200Mbit (Uml receives/Uml sends) at 1GHz, and
still the double at 2Ghz.
This is a different UML though.
* using futexes instead
x86_64 users, especially using Device Mapper.
To hit this bug, a compile-time constant time parameter must be passed - that's
why UML seems to work most times.
Fix this with a simple udelay implementation.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
-
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On Monday 12 March 2007 11:42, Bodo Stroesser wrote:
> Blaisorblade wrote:
> > On Tuesday 06 March 2007 00:26, Blaisorblade wrote:
> > > On Tuesday 06 March 2007 00:10, Jeff Dike wrote:
> > > > On Tue, Mar 06, 2007 at 12:03:26AM +0100, Blaisorblade wrote:
>
On Tuesday 06 March 2007 00:26, Blaisorblade wrote:
> On Tuesday 06 March 2007 00:10, Jeff Dike wrote:
> > On Tue, Mar 06, 2007 at 12:03:26AM +0100, Blaisorblade wrote:
> > > > No, RCX corruption is different - that happens when a sysexit is done
> > > > from a s
ll mmap() to
install the mapping.
> Can somebody explain the
> process to me?
The above is just a little start, to let you explore more and ask more
specific questions.
Bye
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goto out_close;
> }
The second line should better say -err instead of err.
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C
release. It will be published on my
homepage.
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On Tuesday 06 March 2007 00:10, Jeff Dike wrote:
> On Tue, Mar 06, 2007 at 12:03:26AM +0100, Blaisorblade wrote:
> > > No, RCX corruption is different - that happens when a sysexit is done
> > > from a system call where userspace wasn't prepared to save and restore
&g
From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
sigio_lock is taken both from process context and from interrupt context. So we
*must* use irqsave.
Then, remove irq disabling from update_thread(), as it's called with
sigio_lock() held (yes, set_signals(0) is loca
From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
To avoid calling request_irq under a spinlock, and to simplify code around, code
a state machine to allow safely dropping and retaking sigio_lock during
initialization. The state variable is protected by a spinlock together
On Friday 02 February 2007 21:12, Jeff Dike wrote:
> On Fri, Feb 02, 2007 at 06:48:39PM +0100, Blaisorblade wrote:
> > Is this a recent regression or did this always happen?
>
> I haven't looked at the history of the code, but it has the look of
> something that's been
On Monday 05 March 2007 23:03, Jeff Dike wrote:
> On Mon, Mar 05, 2007 at 09:49:02PM +0100, Paolo 'Blaisorblade' Giarrusso
wrote:
> > From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
> >
> > Avoid accepting things like -o .., -o dir/../../
I'm not a subscriber to the list.
Thanks, I've applied this some time ago to my tree, on uml_util.spec.in.
Bye
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++-
mm/memory.c | 124
--
mm/mprotect.c |7 ++
mm/rmap.c |3
mm/shmem.c|2
40 files changed, 472 insertions(+), 98 deletions(-)
--
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From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Avoid accepting things like -o .., -o dir/../../dir2, -o dir/../.. .
This may be considered useless, but YMMV. I consider that this has a limited
security value, exactly like disabling module support (in many case it is
usef
From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Avoid reusing userspace errno twice - it can be cleared by libc code everywhere
(in particular printk() does clear it in my setup).
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
---
From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
os_usr1_signal() is totally unused, os_usr1_process() is used only by TT mode.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
---
arch/um/include/os.h |3 ++-
arch/um/os-Linux/
Some tested UML fixes - should be applied for 2.6.21.
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From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Fix coding conventions violations is arch/um/os-Linux/helper.c.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
---
arch/um/os-Linux/helper.c |2 +-
1 files changed, 1 insertions(
From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Avoid returning ENOMEM in case of a duplicate IRQ - ENOMEM was saved into err
earlier.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
---
arch/um/kernel/irq.c |1 +
1 files chang
From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Memory allocated by mcast_user_init must be freed in the matching mcast_remove.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
---
arch/um/drivers/mcast_user.c | 10 +-
1 f
From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Fix double free in the error path - when name is assigned into root_inode we do
not own it any more and we must not kfree() it - see patch for details.
Thanks to William Stearns for the initial report.
CC: William
From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Fix confusion about call context - comments and code are inconsistent and plain
wrong, my fault.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
---
arch/um/drivers/line.c |6 +++--
From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
* rename name to host_root_path
* rename data to req_root.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
---
fs/hostfs/hostfs_kern.c | 26 +-
1 files changed
From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Since both UML consoles do not use percpu variables, they may be called when the
cpu is still offline, and they may be marked CON_ANYTIME (this is documented in
kernel/printk.c, grep for CON_ANYTIME to find mentions of this)
From: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
When a given host directory is specified to be mounted both in hostfs=path1 and
with mount option -o path2, we should give access to path1/path2, but this does
not happen. Fix that in the simpler way.
Also, root_ino can be
On Sunday 04 March 2007 23:53, Antoine Martin wrote:
> Blaisorblade wrote:
> > On Sunday 04 March 2007 17:50, Sylvain Beucler wrote:
> >> On Sat, Mar 03, 2007 at 07:32:46PM +0100, Blaisorblade wrote:
> >> Hi,
> >>
> >> I tested and it works.
> >&
On Monday 05 March 2007 16:51, Jeff Dike wrote:
> On Sun, Mar 04, 2007 at 08:13:39PM +0100, Blaisorblade wrote:
> > Have you checked if other calls require that register_netdev was already
> > called?
>
> Just did, nothing else depends on it.
Fine.
> > Hmm, I'm
IRQ handlers with SA_SHIRQ really ought to be able to
handle an interrupt happening before request_irq() returns. They also
ought to be able to handle an interrupt happening during the start of
their
call to free_irq(). Let's test that hypothesis
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On Thursday 22 February 2007 20:59, Jeff Dike wrote:
> On Thu, Feb 22, 2007 at 12:54:04AM +0100, Blaisorblade wrote:
> > I started uml_daemon as root by mistake, so /tmp/uml.ctl even if
> > /dev/net/tun was world-readable. Ok, I did it. This is the result (after
> > tr
On Sunday 04 March 2007 17:50, Sylvain Beucler wrote:
> On Sat, Mar 03, 2007 at 07:32:46PM +0100, Blaisorblade wrote:
> Hi,
>
> I tested and it works.
>
> Thanks,
You'll probably also see that -o .. allows bypassing the 'hostfs jail', and
I've just impl
TOWNER, owner) < 0){
> - perror("TUNSETPERSIST");
> + perror("TUNSETOWNER");
>exit(1);
> }
> if(brief)
>
Applied in my tree, thanks.
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http
.events = read ? POLLIN : POLLOUT,
>
Was that removal wanted or it happened by mistake? That way, err is completely
lost.
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ebug at that time).
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it shouldn't, and we're
hitting this. um_interrupt is called with fd => 0 because errno is cleared
after printk (verified under debugging, I did not trace it fully to where
it's changing but it's sufficient for a patch anyway).
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: Andi Kleen <[EMAIL PROTECTED]>
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Index: linux-2.6.18/arch/x86_64/ia32/ptrace32.c
===
--- linux-2.6.18.orig/arch/x86_64/ia32/ptrace32.c
+++ linux-2
you explain this me, I'm wondering.
How do things work when kmalloc_ok is disabled (i.e. initial_thread_cb)? I
thought all reserved memory would stay reserved for the whole UML kernel
lifetime.
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On Monday 19 February 2007 20:52, Jeff Dike wrote:
> On Mon, Feb 19, 2007 at 06:34:42PM +0100, Blaisorblade wrote:
> > Jeff, no answer to this yet? I've just checked and it's not on the
> > patchset page either.
> I already had it in my -mm patchset, minus any attrib
On Thursday 15 February 2007 05:42, Blaisorblade wrote:
> On Thursday 15 February 2007 04:36, Blaisorblade wrote:
> > On Friday 26 January 2007 16:13, Jeff Dike wrote:
> > > On Fri, Jan 26, 2007 at 04:07:05AM -0500, William Stearns wrote:
> > > > After bisect
On Saturday 10 February 2007 18:27, Paolo 'Blaisorblade' Giarrusso wrote:
> Fix the fact that pte_mkread set _PAGE_RW instead of _PAGE_USER (the logic
> is copied from i386 in most place, so it is really as bad as you're
> thinking).
>
> Thus currently page tables
On Friday 16 February 2007 20:02, Jeff Dike wrote:
> On Thu, Feb 15, 2007 at 08:05:56PM +0100, Blaisorblade wrote:
> > Jeff, I verified my patch is _almost_ enough for 2.6.18 for fully booting
> > a 32bit UML; on 2.6.18 I had to also add PTRACE_GET/SET_THREAD_AREA (this
> &
On Friday 16 February 2007 18:02, Jason Lunz wrote:
> On Thu, Feb 15, 2007 at 08:29:28PM +0100, Blaisorblade wrote:
> > The following could be a suggestion, if max_low_pfn is not used between
> > the old and the new moment of assignment (and it seems it is not). This
> > is
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a brief look - drawing a picture which explains
all those variables would help. Both for UML and for every arch...
BTW: init_bootmem is not called by us and we probably should - min_low_pfn is
not initialized.
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On Thursday 15 February 2007 04:36, Blaisorblade wrote:
> On Friday 26 January 2007 16:13, Jeff Dike wrote:
> > On Fri, Jan 26, 2007 at 04:07:05AM -0500, William Stearns wrote:
> > > After bisecting the difference between the two root filesystems,
> > > the critica
On Thursday 15 February 2007 03:54, Jeff Dike wrote:
> On Thu, Feb 15, 2007 at 03:34:23AM +0100, Paolo 'Blaisorblade' Giarrusso
wrote:
> > Index: linux-2.6.git/arch/x86_64/ia32/ptrace32.c
> > ===
> &
ng the "checking
> ptrace" step.
Just fixed such a regression in 2.6.18 - patch is 'x86_64: fix 2.6.18
regression - PTRACE_OLDSETOPTIONS should be accepted'. Actually, Jeff
discovered the same bug today, like me! Please test it to make sure there are
no further bugs.
For
m; however, the other call to file_type (in
init_inode) is also unchecked, and that is less robust.
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Subject: uml - hostfs: fix double free
From: Paolo 'Blaisorbl
was a style change - when a case is added, it must be explicitly
tested this way. In this case, not enough testing was done.
Cc: Andi Kleen <[EMAIL PROTECTED]>
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Index: linux-2.6.git/arch/
On Saturday 10 February 2007 23:21, Jeff Dike wrote:
> On Sat, Feb 10, 2007 at 01:31:20PM +0100, Blaisorblade wrote:
> > libc's printf has an enormous stack usage, so that my_printf is used for
> > direct output instead of printf; if this is ok because it's bootup
> &
igned-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Index: linux-2.6.git/include/asm-um/pgtable.h
===
--- linux-2.6.git.orig/include/asm-um/pgtable.h
+++ linux-2.6.git/include/asm-um/pgtable.h
@@ -270,7 +2
uld be marked as "bootup code only"; otherwise we may reuse
vsprintf() and write() or fputs(); this should match what happens in
my_printf, to avoid any unlikely problem with libc's buffering.
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Inform me of my mistakes, so I can add them to my list!
Paolo Giarrusso, aka Blaisorblade
ht
of my mistakes, so I can add them to my list!
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade
Chiacchiera con i tuoi amici in tempo reale!
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in uml?
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Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade
Chiacchiera con i tuoi amici in tempo reale!
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s corrupted.
And what is the impact on UML (Bodo said his bug would affect SKAS behaviour)?
Above all, how can UML run in SKAS0 mode with this bug (if it can)?
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Inform me of my mistakes, so I can add them to my list!
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade
Ch
On Thursday 25 January 2007 05:31, Andrew Morton wrote:
> On Tue, 23 Jan 2007 23:33:29 +0100
>
> Blaisorblade <[EMAIL PROTECTED]> wrote:
> > On Tuesday 23 January 2007 14:17, Johannes Stezenbach wrote:
> > > On Tue, Jan 23, 2007 at 09:02:30AM +0100, Blaisorblade wrote
On Tuesday 23 January 2007 14:17, Johannes Stezenbach wrote:
> On Tue, Jan 23, 2007 at 09:02:30AM +0100, Blaisorblade wrote:
> > On Monday 22 January 2007 21:13, Johannes Stezenbach wrote:
> > > I was playing with user-mode Linux and found that mknod creates
> > > device
On Monday 22 January 2007 21:59, Jeff Dike wrote:
> On Sat, Jan 20, 2007 at 12:18:30AM +0100, Blaisorblade wrote:
> > Ok, I hope I remembered correctly how to debug such faults (I'm posting
> > the full procedure so you can give a look)
>
> Correct.
>
> > 0x00
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Inform me of my mistakes, so I can add the
s on your / can cause trouble to
both your host and your guest (well, if you boot with init=/bin/sh then there
are less problems).
--
Inform me of my mistakes, so I can add them to my list!
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisor
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