* Re: [PATCH 0/8] netpoll: various bugfixes
From: David S. Miller @ 2005-08-12 2:41 UTC (permalink / raw)
To: mpm; +Cc: akpm, ak, jmoyer, netdev, linux-kernel, mingo, john.ronciak,
rostedt
In-Reply-To: <1.502409567@selenic.com>
From: Matt Mackall <mpm@selenic.com>
Date: Thu, 11 Aug 2005 21:18:28 -0500
> This patch series cleans up a few outstanding bugs in netpoll:
>
> - two bugfixes from Jeff Moyer's netpoll bonding
> - a tweak to e1000's netpoll stub
> - timeout handling for e1000 with carrier loss
> - prefilling SKBs at init
> - a fix-up for a race discovered in initialization
> - an unused variable warning
>
> This patch set was tested over repeated rebooting with both tg3 and
> e1000 and random cable disconnection, with and without SMP and
> preempt. Please apply.
All applied, thanks a lot for putting this patch set together.
I'll push this to Linus after some smoke testing.
^ permalink raw reply
* URGENT
From: Mrs.Wilson @ 2005-08-12 2:36 UTC (permalink / raw)
To: netdev
[-- Attachment #1: Type: text/plain, Size: 1924 bytes --]
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^ permalink raw reply
* $$$ Áö±ßÁö±ßÇÑ ÄÚ°ñÀÌ¢Æ Äð½ºÅ¾ ¢Æ À¸·ÎÀáÀç¿ì°Ù½À´Ï´Ù.!!!
From: Äð½ºÅ¾ @ 2005-08-12 2:31 UTC (permalink / raw)
To: netdev
[-- Attachment #1: Type: text/html, Size: 1364 bytes --]
^ permalink raw reply
* ù ÀÚ°ÝÁõÀ» Àâ¾Æ¶ó~±¹°¡ ±â¼úÀÚ°ÝÁ¦µµÈ®Á¤½ºÆ÷Ã÷°æ¿µ°ü¸®»ç
From: ½ºÆ÷Ã÷°æ¿µ°ü¸®»ç @ 2005-08-12 2:30 UTC (permalink / raw)
To: cvs
[-- Attachment #1: Type: text/html, Size: 2023 bytes --]
^ permalink raw reply
* Çѹø¿¡ µÎ°¡ÁöÀÚ°ÝÁõ[»çȸº¹Áö»ç+°¡Á¤°ü¸®»çÀÚ°ÝÁõ](¹«½ÃÇèÀüÇü+100%Ãë¾÷)Ãëµæ ±âȸ !!
From: Çѹø¿¡ µÎ°¡Áö ÀÚ°ÝÁõ(¹«½ÃÇèÀüÇü+100%Ãë¾÷) @ 2005-08-12 2:26 UTC (permalink / raw)
To: majordomo; +Cc: netdev, cvs, linux-xfs, devfs, kdb, debian-mips
[-- Attachment #1: Type: text/html, Size: 1198 bytes --]
^ permalink raw reply
* [PATCH 8/8] netpoll: remove unused variable
From: Matt Mackall @ 2005-08-12 2:19 UTC (permalink / raw)
To: Andrew Morton, David S. Miller
Cc: ak, Jeff Moyer, netdev, linux-kernel, mingo, john.ronciak,
rostedt
In-Reply-To: <8.502409567@selenic.com>
Remove unused variable
Signed-off-by: Matt Mackall <mpm@selenic.com>
Index: l/net/core/netpoll.c
===================================================================
--- l.orig/net/core/netpoll.c 2005-08-11 01:32:01.000000000 -0500
+++ l/net/core/netpoll.c 2005-08-11 01:49:37.000000000 -0500
@@ -356,7 +356,6 @@ static void arp_reply(struct sk_buff *sk
unsigned char *arp_ptr;
int size, type = ARPOP_REPLY, ptype = ETH_P_ARP;
u32 sip, tip;
- unsigned long flags;
struct sk_buff *send_skb;
struct netpoll *np = NULL;
^ permalink raw reply
* [PATCH 7/8] netpoll: fix initialization/NAPI race
From: Matt Mackall @ 2005-08-12 2:19 UTC (permalink / raw)
To: Andrew Morton, David S. Miller
Cc: ak, Jeff Moyer, netdev, linux-kernel, mingo, john.ronciak,
rostedt
In-Reply-To: <7.502409567@selenic.com>
This fixes a race during initialization with the NAPI softirq
processing by using an RCU approach.
This race was discovered when refill_skbs() was added to
the setup code.
Signed-off-by: Matt Mackall <mpm@selenic.com>
Index: l/net/core/netpoll.c
===================================================================
--- l.orig/net/core/netpoll.c 2005-08-09 00:56:23.000000000 -0500
+++ l/net/core/netpoll.c 2005-08-11 01:50:24.000000000 -0500
@@ -731,6 +731,9 @@ int netpoll_setup(struct netpoll *np)
/* last thing to do is link it to the net device structure */
ndev->npinfo = npinfo;
+ /* avoid racing with NAPI reading npinfo */
+ synchronize_rcu();
+
return 0;
release:
Index: l/include/linux/netpoll.h
===================================================================
--- l.orig/include/linux/netpoll.h 2005-08-09 00:56:23.000000000 -0500
+++ l/include/linux/netpoll.h 2005-08-11 01:33:42.000000000 -0500
@@ -9,6 +9,7 @@
#include <linux/netdevice.h>
#include <linux/interrupt.h>
+#include <linux/rcupdate.h>
#include <linux/list.h>
struct netpoll;
@@ -61,25 +62,31 @@ static inline int netpoll_rx(struct sk_b
return ret;
}
-static inline void netpoll_poll_lock(struct net_device *dev)
+static inline void *netpoll_poll_lock(struct net_device *dev)
{
+ rcu_read_lock(); /* deal with race on ->npinfo */
if (dev->npinfo) {
spin_lock(&dev->npinfo->poll_lock);
dev->npinfo->poll_owner = smp_processor_id();
+ return dev->npinfo;
}
+ return NULL;
}
-static inline void netpoll_poll_unlock(struct net_device *dev)
+static inline void netpoll_poll_unlock(void *have)
{
- if (dev->npinfo) {
- dev->npinfo->poll_owner = -1;
- spin_unlock(&dev->npinfo->poll_lock);
+ struct netpoll_info *npi = have;
+
+ if (npi) {
+ npi->poll_owner = -1;
+ spin_unlock(&npi->poll_lock);
}
+ rcu_read_unlock();
}
#else
#define netpoll_rx(a) 0
-#define netpoll_poll_lock(a)
+#define netpoll_poll_lock(a) 0
#define netpoll_poll_unlock(a)
#endif
Index: l/net/core/dev.c
===================================================================
--- l.orig/net/core/dev.c 2005-08-09 00:56:23.000000000 -0500
+++ l/net/core/dev.c 2005-08-11 01:34:08.000000000 -0500
@@ -1696,7 +1696,8 @@ static void net_rx_action(struct softirq
struct softnet_data *queue = &__get_cpu_var(softnet_data);
unsigned long start_time = jiffies;
int budget = netdev_budget;
-
+ void *have;
+
local_irq_disable();
while (!list_empty(&queue->poll_list)) {
@@ -1709,10 +1710,10 @@ static void net_rx_action(struct softirq
dev = list_entry(queue->poll_list.next,
struct net_device, poll_list);
- netpoll_poll_lock(dev);
+ have = netpoll_poll_lock(dev);
if (dev->quota <= 0 || dev->poll(dev, &budget)) {
- netpoll_poll_unlock(dev);
+ netpoll_poll_unlock(have);
local_irq_disable();
list_del(&dev->poll_list);
list_add_tail(&dev->poll_list, &queue->poll_list);
@@ -1721,7 +1722,7 @@ static void net_rx_action(struct softirq
else
dev->quota = dev->weight;
} else {
- netpoll_poll_unlock(dev);
+ netpoll_poll_unlock(have);
dev_put(dev);
local_irq_disable();
}
^ permalink raw reply
* [PATCH 6/8] netpoll: pre-fill skb pool
From: Matt Mackall @ 2005-08-12 2:19 UTC (permalink / raw)
To: Andrew Morton, David S. Miller
Cc: ak, Jeff Moyer, netdev, linux-kernel, mingo, john.ronciak,
rostedt
In-Reply-To: <6.502409567@selenic.com>
we could do one thing (see the patch below): i think it would be useful
to fill up the netlogging skb queue straight at initialization time.
Especially if netpoll is used for dumping alone, the system might not be
in a situation to fill up the queue at the point of crash, so better be
a bit more prepared and keep the pipeline filled.
Ingo
Signed-off-by: Ingo Molnar <mingo@elte.hu>
I've modified this to be called earlier - mpm
Signed-off-by: Matt Mackall <mpm@selenic.com>
Index: l/net/core/netpoll.c
===================================================================
--- l.orig/net/core/netpoll.c 2005-08-08 23:00:48.000000000 -0500
+++ l/net/core/netpoll.c 2005-08-11 01:50:31.000000000 -0500
@@ -724,6 +724,10 @@ int netpoll_setup(struct netpoll *np)
npinfo->rx_np = np;
spin_unlock_irqrestore(&npinfo->rx_lock, flags);
}
+
+ /* fill up the skb queue */
+ refill_skbs();
+
/* last thing to do is link it to the net device structure */
ndev->npinfo = npinfo;
^ permalink raw reply
* [PATCH 4/8] netpoll: netpoll_send_skb simplify
From: Matt Mackall @ 2005-08-12 2:19 UTC (permalink / raw)
To: Andrew Morton, David S. Miller
Cc: ak, Jeff Moyer, netdev, linux-kernel, mingo, john.ronciak,
rostedt
In-Reply-To: <4.502409567@selenic.com>
Minor netpoll_send_skb restructuring
Restructure to avoid confusing goto and move some bits out of the
retry loop.
Signed-off-by: Matt Mackall <mpm@selenic.com>
Index: l/net/core/netpoll.c
===================================================================
--- l.orig/net/core/netpoll.c 2005-08-07 15:15:48.000000000 -0500
+++ l/net/core/netpoll.c 2005-08-07 16:59:27.000000000 -0500
@@ -248,14 +248,14 @@ static void netpoll_send_skb(struct netp
int status;
struct netpoll_info *npinfo;
-repeat:
- if(!np || !np->dev || !netif_running(np->dev)) {
+ if (!np || !np->dev || !netif_running(np->dev)) {
__kfree_skb(skb);
return;
}
- /* avoid recursion */
npinfo = np->dev->npinfo;
+
+ /* avoid recursion */
if (npinfo->poll_owner == smp_processor_id() ||
np->dev->xmit_lock_owner == smp_processor_id()) {
if (np->drop)
@@ -265,29 +265,31 @@ repeat:
return;
}
- spin_lock(&np->dev->xmit_lock);
- np->dev->xmit_lock_owner = smp_processor_id();
+ while (1) {
+ spin_lock(&np->dev->xmit_lock);
+ np->dev->xmit_lock_owner = smp_processor_id();
+
+ /*
+ * network drivers do not expect to be called if the queue is
+ * stopped.
+ */
+ if (netif_queue_stopped(np->dev)) {
+ np->dev->xmit_lock_owner = -1;
+ spin_unlock(&np->dev->xmit_lock);
+ netpoll_poll(np);
+ continue;
+ }
- /*
- * network drivers do not expect to be called if the queue is
- * stopped.
- */
- if (netif_queue_stopped(np->dev)) {
+ status = np->dev->hard_start_xmit(skb, np->dev);
np->dev->xmit_lock_owner = -1;
spin_unlock(&np->dev->xmit_lock);
- netpoll_poll(np);
- goto repeat;
- }
-
- status = np->dev->hard_start_xmit(skb, np->dev);
- np->dev->xmit_lock_owner = -1;
- spin_unlock(&np->dev->xmit_lock);
+ /* success */
+ if(!status)
+ return;
- /* transmit busy */
- if(status) {
+ /* transmit busy */
netpoll_poll(np);
- goto repeat;
}
}
^ permalink raw reply
* [PATCH 5/8] netpoll: add retry timeout
From: Matt Mackall @ 2005-08-12 2:19 UTC (permalink / raw)
To: Andrew Morton, David S. Miller
Cc: ak, Jeff Moyer, netdev, linux-kernel, mingo, john.ronciak,
rostedt
In-Reply-To: <5.502409567@selenic.com>
Add limited retry logic to netpoll_send_skb
Each time we attempt to send, decrement our per-device retry counter.
On every successful send, we reset the counter.
We delay 50us between attempts with up to 20000 retries for a total of
1 second. After we've exhausted our retries, subsequent failed
attempts will try only once until reset by success.
Signed-off-by: Matt Mackall <mpm@selenic.com>
Index: lhg/net/core/netpoll.c
===================================================================
--- lhg.orig/net/core/netpoll.c 2005-08-11 16:17:45.000000000 -0700
+++ lhg/net/core/netpoll.c 2005-08-11 16:45:20.000000000 -0700
@@ -33,6 +33,7 @@
#define MAX_UDP_CHUNK 1460
#define MAX_SKBS 32
#define MAX_QUEUE_DEPTH (MAX_SKBS / 2)
+#define MAX_RETRIES 20000
static DEFINE_SPINLOCK(skb_list_lock);
static int nr_skbs;
@@ -265,7 +266,8 @@ static void netpoll_send_skb(struct netp
return;
}
- while (1) {
+ do {
+ npinfo->tries--;
spin_lock(&np->dev->xmit_lock);
np->dev->xmit_lock_owner = smp_processor_id();
@@ -277,6 +279,7 @@ static void netpoll_send_skb(struct netp
np->dev->xmit_lock_owner = -1;
spin_unlock(&np->dev->xmit_lock);
netpoll_poll(np);
+ udelay(50);
continue;
}
@@ -285,12 +288,15 @@ static void netpoll_send_skb(struct netp
spin_unlock(&np->dev->xmit_lock);
/* success */
- if(!status)
+ if(!status) {
+ npinfo->tries = MAX_RETRIES; /* reset */
return;
+ }
/* transmit busy */
netpoll_poll(np);
- }
+ udelay(50);
+ } while (npinfo->tries > 0);
}
void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
@@ -642,6 +648,7 @@ int netpoll_setup(struct netpoll *np)
npinfo->rx_np = NULL;
npinfo->poll_lock = SPIN_LOCK_UNLOCKED;
npinfo->poll_owner = -1;
+ npinfo->tries = MAX_RETRIES;
npinfo->rx_lock = SPIN_LOCK_UNLOCKED;
} else
npinfo = ndev->npinfo;
Index: lhg/include/linux/netpoll.h
===================================================================
--- lhg.orig/include/linux/netpoll.h 2005-08-11 15:40:27.000000000 -0700
+++ lhg/include/linux/netpoll.h 2005-08-11 16:17:56.000000000 -0700
@@ -26,6 +26,7 @@ struct netpoll {
struct netpoll_info {
spinlock_t poll_lock;
int poll_owner;
+ int tries;
int rx_flags;
spinlock_t rx_lock;
struct netpoll *rx_np; /* netpoll that registered an rx_hook */
^ permalink raw reply
* [PATCH 3/8] netpoll: e1000 netpoll tweak
From: Matt Mackall @ 2005-08-12 2:19 UTC (permalink / raw)
To: Andrew Morton, David S. Miller
Cc: ak, Jeff Moyer, netdev, linux-kernel, mingo, john.ronciak,
rostedt
In-Reply-To: <3.502409567@selenic.com>
Suggested by Steven Rostedt, matches his patch included in e100.
Signed-off-by: Matt Mackall <mpm@selenic.com>
Index: l/drivers/net/e1000/e1000_main.c
===================================================================
--- l.orig/drivers/net/e1000/e1000_main.c 2005-08-06 17:36:32.000000000 -0500
+++ l/drivers/net/e1000/e1000_main.c 2005-08-06 17:55:01.000000000 -0500
@@ -3789,6 +3789,7 @@ e1000_netpoll(struct net_device *netdev)
struct e1000_adapter *adapter = netdev_priv(netdev);
disable_irq(adapter->pdev->irq);
e1000_intr(adapter->pdev->irq, netdev, NULL);
+ e1000_clean_tx_irq(adapter);
enable_irq(adapter->pdev->irq);
}
#endif
^ permalink raw reply
* [PATCH 1/8] netpoll: rx_flags bugfix
From: Matt Mackall @ 2005-08-12 2:19 UTC (permalink / raw)
To: Andrew Morton, David S. Miller
Cc: ak, Jeff Moyer, netdev, linux-kernel, mingo, john.ronciak,
rostedt
In-Reply-To: <1.502409567@selenic.com>
Initialize npinfo->rx_flags. The way it stands now, this will have random
garbage, and so will incur a locking penalty even when an rx_hook isn't
registered and we are not active in the netpoll polling code.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Matt Mackall <mpm@selenic.com>
--- linux-2.6.12/net/core/netpoll.c.orig 2005-07-01 14:02:56.039174635 -0400
+++ linux-2.6.12/net/core/netpoll.c 2005-07-01 14:03:16.688739508 -0400
@@ -639,6 +639,7 @@ int netpoll_setup(struct netpoll *np)
if (!npinfo)
goto release;
+ npinfo->rx_flags = 0;
npinfo->rx_np = NULL;
npinfo->poll_lock = SPIN_LOCK_UNLOCKED;
npinfo->poll_owner = -1;
^ permalink raw reply
* [PATCH 2/8] netpoll: deadlock bugfix
From: Matt Mackall @ 2005-08-12 2:19 UTC (permalink / raw)
To: Andrew Morton, David S. Miller
Cc: ak, Jeff Moyer, netdev, linux-kernel, mingo, john.ronciak,
rostedt
In-Reply-To: <2.502409567@selenic.com>
This fixes an obvious deadlock in the netpoll code. netpoll_rx takes the
npinfo->rx_lock. netpoll_rx is also the only caller of arp_reply (through
__netpoll_rx). As such, it is not necessary to take this lock.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Matt Mackall <mpm@selenic.com>
Index: l/net/core/netpoll.c
===================================================================
--- l.orig/net/core/netpoll.c 2005-08-06 17:47:48.000000000 -0500
+++ l/net/core/netpoll.c 2005-08-06 17:47:49.000000000 -0500
@@ -353,11 +353,8 @@ static void arp_reply(struct sk_buff *sk
struct sk_buff *send_skb;
struct netpoll *np = NULL;
- spin_lock_irqsave(&npinfo->rx_lock, flags);
if (npinfo->rx_np && npinfo->rx_np->dev == skb->dev)
np = npinfo->rx_np;
- spin_unlock_irqrestore(&npinfo->rx_lock, flags);
-
if (!np)
return;
^ permalink raw reply
* [PATCH 0/8] netpoll: various bugfixes
From: Matt Mackall @ 2005-08-12 2:18 UTC (permalink / raw)
To: Andrew Morton, David S. Miller
Cc: ak, Jeff Moyer, netdev, linux-kernel, mingo, john.ronciak,
rostedt
This patch series cleans up a few outstanding bugs in netpoll:
- two bugfixes from Jeff Moyer's netpoll bonding
- a tweak to e1000's netpoll stub
- timeout handling for e1000 with carrier loss
- prefilling SKBs at init
- a fix-up for a race discovered in initialization
- an unused variable warning
This patch set was tested over repeated rebooting with both tg3 and
e1000 and random cable disconnection, with and without SMP and
preempt. Please apply.
^ permalink raw reply
* ÁÖ¹æ¿ë¿ø¸ñÄ®¼¼Æ®7PCS
From: whwls @ 2005-08-12 1:51 UTC (permalink / raw)
To: linux-xfs
[-- Attachment #1: Type: text/html, Size: 1414 bytes --]
^ permalink raw reply
* ÆÐ¼Ç Ãò¸®´×¿¡¹«·á»çÀºÇ°!-ºÎµµÁ¤¸®
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To: netdev
[-- Attachment #1: Type: text/html, Size: 417 bytes --]
^ permalink raw reply
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To: netdev
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="DEFAULT", Size: 3005 bytes --]
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^ permalink raw reply
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From: lsong18 @ 2005-08-12 0:54 UTC (permalink / raw)
To: netdev
[-- Attachment #1: Type: text/html, Size: 4955 bytes --]
^ permalink raw reply
* Ä«µåÀÚ±ÝÀ¸·Î°í¹ÎÇϽôºÐ,ÃÖÀú±Ý¸®»óȯ¹æ¹ýÀ»¹«·á»ó´ãÇص帳´Ï´Ù.
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* ÄÚ°ñÀÌ°¡ ½ÉÇؼ÷¸é¿¡ ¹æÇØ°¡µÇ½Ã´ÂºÐ ÇʼöÇ°.
From: ÀϺ»È÷Æ®»óÇ° @ 2005-08-12 0:48 UTC (permalink / raw)
To: cvs
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* (no subject)
From: seohai @ 2005-08-12 0:40 UTC (permalink / raw)
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* Прорыв в продажах!
From: 23 - 24 августа 2005 года @ 2005-08-12 0:39 UTC (permalink / raw)
To: netdev
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Приглашаем руководителей отделов продаж, директоров по продажам, коммерческих
директоров и других специалистов принять участие в новом актуальном семинаре:
"Прорыв в продажах!
Алгоритм действий начальника отдела продаж"
23 - 24 августа 2005 года
Цель семинара-тренинга: Познакомить директоров по продажам и руководителей
отделов продаж с новой Системой Роста ПродажTM, которая позволяет разработать
программу Прорыва в продажах (опыт 30-250% дополнительного прироста). Участники
смогут перестроить не только подсистемы планирования, контроля продаж,
подходы к принятию оперативных решений, но и скорректировать свою текущую
ежедневную работу, организовав ее для достижения целей роста продаж компании.
Cеминар адресован директорам по продажам, руководителям отделов продаж,
коммерческим директорам, которые заинтересованы в достижении достаточно
амбициозных целей роста. Система наиболее ценна для компаний, которые хотят
превратить тенденцию спада в рост, или планирующих за год удвоить свои
темпы роста. Тренинг будет адаптирован под группу зарегистрировавшихся
участников.
В программе семинара:
Методы экспресс-анализа эффективности системы продаж в компании. Система
сбалансированных показателей эффективности системы продаж. Основные заблуждения
менеджеров по продажам и их руководителей. 4 роли руководителя сбытовой
функции Три основных подхода к продажам: особенности России. Концепция
CRM (управление взаимоотношениями с клиентами) и ее реализация на практике
Жизненный цикл клиента (ЖЦК) и его стоимость. Особенности работы с VIP-клиентами
Структура Системы роста продаж (практическая альтернатива 4П маркетинга).
Дизайн/корректировка элементов системы под конкретные количественные цели
роста Особенности построения системы продаж с учетом CRM. Способы активизации
продаж (мобилизационные механизмы) Внедрение новой системы продаж: алгоритм
действий и особенности внедрения в разных отраслях и видах бизнеса. Возможные
ошибки и проблемы с учетом специфики менталитета Разработка плана внедрения
системы на предприятиях участников. Основные барьеры внедрения и их преодоление;
Вспомогательные подсистемы: отбор продавцов - новые требования и способы
отбора, стимулирование продавцов - структура компенсационного пакета, методы
и формы стимулирования, подсистема собраний-совещаний; Культура активных
продаж: внедрение новых элементов в корпоративную культуру Автор семинара
- известный системный тренер-консультант, руководитель и совладелец тренингово-консалтинговой
компании "Business Solutions" (Украина). Автор-разработчик Системы Роста
ПродажT, с успехом внедривший ее в компаниях клиентов и в собственном бизнесе.
Имеет восьмилетний опыт разработки и внедрения процессов изменений и развития
бизнеса в компаниях разных форм собственности и масштабов бизнеса.
Получить подробную информацию Вы можете по телефонам: (095) 980-65-39
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* Fragâncias exóticas. . sok
From: Evandro Gentil . xtb @ 2005-08-12 0:34 UTC (permalink / raw)
To: clientes
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* Seminario Fiscalización Dirección del Trabajo - Santiago.
From: =?iso-8859-1?q?Sitiven_Capacitaci=F3n_ @ 2005-08-12 0:30 UTC (permalink / raw)
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