email is also possible. I need it
pretty soon.
Regards
Elazar Leibovich
054.4 9 6 7 7.8.4
=
To unsubscribe, send mail to [EMAIL PROTECTED] with
the word "unsubscribe" in the message body, e.g., run the command
echo unsubscr
It seems that my question boils down to this:
I'm having a 3Gb table with three TEXT columns and an ID.
Counting it takes between 1 to 2 minutes, is it normal for such a size
of a table?
On 3/21/07, Elazar Leibovich <[EMAIL PROTECTED]> wrote:
I need a MySQL consultant for a small c
The whole table. SELECT COUNT(*) FROM tbl WHERE id>1;
Thanks for the speedy reply.
On 3/21/07, Jonathan Ben Avraham <[EMAIL PROTECTED]> wrote:
Hi Elazar,
What is it exactly that you are counting?
- yba
On Wed, 21 Mar 2007, Elazar Leibovich wrote:
> Date: Wed, 21 Mar 2007 15
directions (reducing logs
resolution etc.).
Will the fact I'll have no TEXT columns speed things up? Will removing all
columns except of id from the giant posts table throttle things up
significantly?
On 3/21/07, Jonathan Ben Avraham <[EMAIL PROTECTED]> wrote:
On Wed, 21 Mar 2007, Elaza
my wish, but to actually process the data.
On 3/21/07, Tzahi Fadida <[EMAIL PROTECTED]> wrote:
On Wednesday 21 March 2007 16:02, Elazar Leibovich wrote:
> The whole table. SELECT COUNT(*) FROM tbl WHERE id>1;
> Thanks for the speedy reply.
Without knowing how mysql works, i can t
Problem:
I wish to hack and solve Bidirectionality related bugs in Lyx.
However, I don't want to read all and understand all the code in Lyx,
but only the code related to cursor movement, character insertion,
etc.
How can I find the relevant pieces of code quickly?
Suggested Solution:
Run Lyx with
I'm looking for a SMTP relay server, that would enable me to recieve a
list of bounced emails. It needs to support delivery of 400K messages
daily.
Can you provide me any recommendations?
=
To unsubscribe, send mail to [EMAIL PROTECT
essages and your bandwidth.
Sendmail has the log format and rule rewriting capabilityies that you
probably need, here as PostFix is probably harder to configure for this
type of specialized task.
- yba
On Thu, 17 May 2007, Elazar Leibovich wrote:
> Date: Thu, 17 May 2007 08:52:55 +0300
>
gned for such mail
distribution, with subscription management done by the users themselves, and
of course, built-in ability to detect bounces and automatically unsubscribe
such users? For example, mailman[1] ?
-- Shimi
[1] http://www.gnu.org/software/mailman/
On Thursday 17 May 2007 09:16, Elazar Lei
I've been trying to find a solution for audio communication (ie
libjingle) with google talk clients on windows. So far, no luck.
I tried tapiocaui, gossip-telepathy, but nothing worked. Either
installation went havoc (needed a specific version of a specific
library I couldn't find) or it installed
There's a PCI card called Magiccard[1] which is recoverring one of your
harddrive's partitions after each period of time or manually. The main use of
that is
to back up a windows partition, and make ruining it impossible.
I'd like to immitate it on software. My plan is to
divide the harddrives i
I'm trying to get Trendnet's TEW 424UB WLAN USB adaptor [1] to work with linux.
I couldn't find a native support with google, NDISwrapper claims to support
this exact trendnet model. Installation worked fine for me (clean knoppix4.02)
however it couldn't find the hotspot nearby. In both winXP an
Are you quite sure this is necessary?In debian, you just 'apt-get upgrade' can't you immitate it with RH?On 6/11/06, Oded Arbel <
[EMAIL PROTECTED]> wrote:
On Sat, 2006-06-10 at 19:42 -0700, E Leibovich wrote:
Given a live server that runs many relatively uncommon
programs (for instance
That's very true, I haven't thought of that. Thanks.
Any smarter idea? Maybe I can filter emails coming from my host email
address and then make sure they're not recieved: from unknown source
(spammers has the habbit of including your hostname in the from:
field, so that you'll whitelist them)
On
ut
Sender Policy Framework (SPF). Using a mail server with SPF is about all
you can do; it ain't good news, but trust the smart people who thought
SPF up there isn't a better option.
Elazar Leibovich wrote:
> That's very true, I haven't thought of that. Thanks.
> Any smar
qmail complains occasionaly he's"Unable_to_run_qmail-remote./" in the logs, I'vefailed to find decent documentation on the web forsuch a failure, peeking at qmail's source reveals that
it reports such an error is reported ifread(probablly-qmail-remote-pipe,...) returns zero and(status_of_qmail-remo
The first question I have in mind, is, how do you define a lock benchmark?
Is your goal to minimize overhead? Is your goal to minimize the latency of
a successful uncontended acquire? Is your goal to minimize bus load for
other CPU when three CPUs are waiting for the spin lock?
What we're measurin
case.
I'll be glad for any feedback.
Thanks again.
On Wed Nov 26 2014 at 10:43:43 AM Muli Ben-Yehuda wrote:
> On Tue, Nov 25, 2014 at 08:56:01PM +, Elazar Leibovich wrote:
>
> > The first question I have in mind, is, how do you define a lock
> > benchmark?
I'm given a stopped virtual machine, with access to the CPU and the memory.
It is now running a kernel function.
I want to copy the entire kernel stack.
How can I do that in a generic way, that would hopefully work across
multiple kernels.
For simplification, let's discuss x64.
I know where the
Thanks,
On Sun, Dec 21, 2014 at 9:27 AM, Muli Ben-Yehuda wrote:
> On Fri, Dec 19, 2014 at 02:19:07PM +0000, Elazar Leibovich wrote:
>
>> I know where the stack ends, but how can I know where it begins?
>
> What assumptions can you make? Can you run kernel code in the VM
>
> configurations and new versions.
>
> On the other hand, reliance upon OS identification would at least enable
> the user to call Support when he runs your code on an OS not identified
> as a supported OS.
>
> --- Omer
>
>
> On Sun, 2014-12-21 at 11:08 +0200, Elazar Leib
e->return_address;
print_ftrace_graph_addr(addr, data, ops, tinfo, graph);
}
On Sun Dec 21 2014 at 9:28:01 AM Muli Ben-Yehuda wrote:
> On Fri, Dec 19, 2014 at 02:19:07PM +, Elazar Leibovich wrote:
>
> > I know where the stack ends, but how can I know where it begins?
>
&g
bvious improvement was to traverse two stack pages instead of one, but
so far it doesn't look like I've seen truncated stacks.
On Wed, Jan 7, 2015 at 11:50 AM, Elazar Leibovich wrote:
> For future reference.
>
> I examined what perf does when sampling the stack, (e.g. "-g&quo
Hi,
I'm writing a kernel module, and I want to expose some debug
information about it.
The debug information is often of the form of request-response.
For example:
- Hey module, what's up with data at 0xe8ff0040c000?
- Cached, populated two hours ago.
- Hey module, please invalidate data a
s:
>
> http://www.linuxfoundation.org/collaborate/workgroups/networking/generic_netlink_howto
>
> (link got broken - place it all on a single line)
>
> --guy
>
>
> On 03/26/2015 11:36 PM, Elazar Leibovich wrote:
>>
>> Hi,
>>
>> I'm writing a kernel module,
simply mempcy
> structures, without really writing serialization code (there's no endianess
> issues, with both sides running on the same host, by definition).
>
> --guy
>
>
> On 03/27/2015 10:03 AM, Elazar Leibovich wrote:
>>
>> Thanks, didn't know netlink.
>
itch.py
On Sat, Mar 28, 2015 at 12:49 AM, Amos Shapira
wrote:
> If serialisation (aka "marshalling") is considered, how about making it
> text based?
> Then you can use simple shell tools to talk to it.
>
>
> On 27 March 2015 at 22:34, Elazar Leibovich wrote:
>
>
Sounds good, thanks (although it'll be harder to use from non-C programs).
Do you have a good idea how to stream information as a response to ioctl?
On Mon, Mar 30, 2015 at 3:31 PM, Gilboa Davara wrote:
> On Thu, Mar 26, 2015 at 11:36 PM, Elazar Leibovich
> wrote:
> > Hi,
&g
emcpy.
Or at least this is one of the reasons.
Thanks,
On Mon, Mar 30, 2015 at 5:08 PM, Gilboa Davara wrote:
> On Mon, Mar 30, 2015 at 3:44 PM, Elazar Leibovich
> wrote:
> > Sounds good, thanks (although it'll be harder to use from non-C
> programs).
>
> I usually
Hi,
I was extending perf counters to sample the stack of a KVM guest from
a module[0].
The current KVM profiling architecture, keeps a CPU local variable
current_vcpu of the current vcpu running before vm_enter, and removes
it after a vm_exit.
Then, when an NMI occurs, it could check the current
I'm writing a small C library, that I want to open source.
I want them to be usable for embedded environment, where memory allocation
must be controlled.
Hence, I abstracted away calls to malloc/realloc, and replaced them with
struct mem_pool {
void *(*allloc)(void *mem_pool, void *prev_ptr,
; be very annoying to the user. Give him a null and let him crash or handle
> it as he sees fit.
>
> Baruch
>
> On Fri, May 15, 2015 at 5:47 PM, Elazar Leibovich
> wrote:
>
>> I'm writing a small C library, that I want to open source.
>>
>> I want them to b
seng: Market-Driven Memory Allocation
> <http://www.cs.technion.ac.il/~ladypine/vee18-agmon-ben-yehuda.pdf>, Orna
> Agmon Ben-Yehuda, Eyal Posener, Muli Ben-Yehuda, Assaf Schuster, Ahuva
> Mu'alem. In proceedings of VEE 2014.
>
>
> On Sat, May 16, 2015 at 9:14 PM, El
y speaking, but
allocates memory. Those would have to return error, and the user would have
to check the error.
Thanks,
On Sat, May 16, 2015 at 11:18 PM, Oleg Goldshmidt
wrote:
> Elazar Leibovich writes:
>
> > My question is, should I support the case of malloc failure. On one
>
What are other practical use cases where malloc returns NULL.
You mentioned programmer error.
I second, and mention restricted environment where admin ulimits your
virtual memory.
I'll be happy to hear more.
On Sun, May 17, 2015 at 9:51 PM, Oleg Goldshmidt wrote:
> Elazar Leibovich
Does anyone have a creative idea how to set a hardware breakpoint on
physical address with a VM. In x86-64 architecture.
The best idea I've had, is patching KVM, and let him pretend some
non-canonical vaddress is actually a physical address (e.g., hbr
*0xf00d0A-BCDE-FGHI is equiv to a breakpoint o
Oh, and the idea of the KVM patch is, for each physical HW bp, add a
relevant entry in the spt, and set the hardware breakpoint there. This is
assuming KVM HW bp works like I think they do.
On Sat, Aug 29, 2015 at 10:13 PM, Elazar Leibovich
wrote:
> Does anyone have a creative idea how to se
Ravello systems is developing an hypervisor/virtual machine capable of
running on the cloud.
Companies who want to run, e.g., ESXi on the cloud, are running their
software on Ravello's hypervisor which is capable of running nested on AWS
or Google cloud.
Ravello also emulates Layer 2 network for
Hi,
In all recent Intel hardware, rdtsc is providing number of ticks since
boot, with a constant rate, and is equal among CPUs.
Vol III 17.14
For Pentium 4 processors, (...): the time-stamp counter increments at
a constant rate. That rate may be set by the
maximum core-clock to bus-clock ratio of
gainst the hpet, assume it's in khz
precision and round it down from userspace, but I'm still looking for
a better solution to do that.
I'm not a kernel expert, maybe tsc_khz is exported to userspace somehow.
Anyone have any idea?
On Wed, Apr 20, 2016 at 8:10 AM, Elazar Leibovich
some
way to measure that in userspace even without the kernel.
On Wed, Apr 20, 2016 at 1:03 PM, Elazar Leibovich wrote:
> I didn't think about it at first, but since the kernel uses tsc as a
> clock source, I'd better have a look at what it does.
>
> Note that there are some ts
Hi,
I'm having a few (say, a few tens) Debian machines, with a local repository
defined.
In the local repository I have some home made packages I'm building and
pushing to the local repository.
When I'm upgrading my package, I want to be sure the update wouldn't cause
a problem.
So I wish to in
be parallel-ssh install on all the servers.
>
> P. S. In case of few tens of servers I'd prefer to work with ansible or
> alternative, it's worh it in most cases/
>
> Best Regards, Evgeniy.
>
>
> On Tue, Aug 2, 2016 at 8:50 PM, Elazar Leibovich
> wrote:
>
&g
7;d even go
> for immutable server images (e.g. Packer building AMI's, or Docker
> containers), then it's a matter of just firing up an instance of the new
> image both when testing and in production.
>
> --Amos
>
> On 3 August 2016 at 16:55, Elazar Leibovich wrote:
>
software do that you can't test before installing on production
> servers?
>
> On 6 August 2016 at 02:14, Elazar Leibovich wrote:
>
>> All real servers, with custom hardware attached, geographically
>> distributed across the planet.
>>
>> Real people actually
Hi,
It's really convenient that two Linux computers usuallly have mDNS
installed by default.
I can then do scp x moshe.local, to my friend's laptop.
In order for that to work with Windows, one can enable Window's zeroconf
standard, LLMNR. The easiest way is by configuring systemd-resolved to
supp
ue, Nov 29, 2016 at 3:21 PM, Shay Gover wrote:
> Once upon a time I was a Windows sysadmin. Anyway, there was a nice site,
> called blackviper.com that listed windows services default state. However
> it's appears it's down now. Maybe tomorrow it'll be up?
>
> Shay
>
Hi,
While a little bit niche, and while unfortunately not enough Arabic
speaking folks are in the hi-tech scene in Israel, I still send this query,
and feel free to ask an Arabic speaking friend.
Is there an open standard/de facto standard/implementation of Arabic
transliteration. From Hebrew or
Hi,
Is there some open standard for smart home.
The only thing I've seen which is close to open standard is KNX.
But I'm not sure if there's a free/open source implementation of the
standard ETS5 software used to configure KNX modules.
Is the files specifying KNX hardware data, e.g., vd2, knxprod
h
k with KNX, it's not just the wire
protocol.
On Sun, May 21, 2017, 2:59 PM Rabin Yasharzadehe wrote:
> Please clarify what do you mean by "open standard for smart home"
> are you referring to the communication between devices ?
>
> --
> Rabin
>
> On 21 May 2017 at
one of them call OpenHAB <https://www.openhab.org/>
>
> some devices will require a firmware flashing to make them to work with
> your "cloud" and not the vendor.
>
> one popular and cheep devices to start with are the Sonoff switches.
>
> --
> Rabin
>
e because the option to reprogram there firmware
> and avoid the vendor lock problem which most of this devices have.
>
> The OpenHAB froums are also a great place to find devices which work
> seamlessly with OpenHAB and find other hardware recommendation.
>
> --
> Rabin
>
>
/software.intel.com/sites/default/files/managed/c5/15/architecture-instruction-set-extensions-programming-reference.pdf
[1] https://patchwork.kernel.org/patch/10007161/
On Sun, Aug 30, 2015 at 7:58 AM, Muli Ben-Yehuda wrote:
> On Sat, Aug 29, 2015 at 10:44:17PM +0300, Elazar Leibovich wrote:
>
Oracle is building its own cloud, OCI, with Ravello's cloud is running
above it.
Ravello is the only organization I know, running nested KVM in production,
sometimes nested 3 levels deep, which presents some unique challenges.
Here are some patches from the team:
https://patchwork.kernel.org/pat
What you probably want, is something similar to Windows VBS HVCI, which
is usually achieved via underlying hypervisor.
It forces you to pass the security boundary of the hypervisor, even if
security boundary between user/kernel is bypassed.
Have a look at Bromium or QubeOS for a full solution
om
a real security professional (e.g., not me), because there are probably
other concerns you and me are not even considering now.
On 17/01/2019 11:26, Elazar Leibovich wrote:
What you probably want, is something similar to Windows VBS HVCI,
which is usually achieved via underlying hypervisor.
Sounds like you want IMA+EVM, specifically IMA-appraisal. I've no
experience with that in practice.
https://sourceforge.net/p/linux-ima/wiki/Home/#ima-appraisal
https://events.linuxfoundation.org/wp-content/uploads/2017/12/LSS2018-EU-LinuxIntegrityOverview_Mimi-Zohar.pdf
As I mentioned before, ju
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