| Commit message (Collapse) | Author | Age |
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* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
sched: cpu accounting controller (V2)
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Commit cfb5285660aad4931b2ebbfa902ea48a37dfffa1 removed a useful feature for
us, which provided a cpu accounting resource controller. This feature would be
useful if someone wants to group tasks only for accounting purpose and doesnt
really want to exercise any control over their cpu consumption.
The patch below reintroduces the feature. It is based on Paul Menage's
original patch (Commit 62d0df64065e7c135d0002f069444fbdfc64768f), with
these differences:
- Removed load average information. I felt it needs more thought (esp
to deal with SMP and virtualized platforms) and can be added for
2.6.25 after more discussions.
- Convert group cpu usage to be nanosecond accurate (as rest of the cfs
stats are) and invoke cpuacct_charge() from the respective scheduler
classes
- Make accounting scalable on SMP systems by splitting the usage
counter to be per-cpu
- Move the code from kernel/cpu_acct.c to kernel/sched.c (since the
code is not big enough to warrant a new file and also this rightly
needs to live inside the scheduler. Also things like accessing
rq->lock while reading cpu usage becomes easier if the code lived in
kernel/sched.c)
The patch also modifies the cpu controller not to provide the same accounting
information.
Tested-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Tested the patches on top of 2.6.24-rc3. The patches work fine. Ran
some simple tests like cpuspin (spin on the cpu), ran several tasks in
the same group and timed them. Compared their time stamps with
cpuacct.usage.
Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
[SCSI] NCR5380: Fix bugs and canonicalize irq handler usage
[SCSI] zfcp: fix cleanup of dismissed error recovery actions
[SCSI] zfcp: fix dismissal of error recovery actions
[SCSI] qla1280: convert to use the data buffer accessors
[SCSI] iscsi: return data transfer residual for data-out commands
[SCSI] iscsi_tcp: fix potential lockup with write commands
[SCSI] aacraid: fix security weakness
[SCSI] aacraid: fix up le32 issues in BlinkLED
[SCSI] aacraid: fix potential panic in thread stop
[SCSI] aacraid: don't assign cpu_to_le32(constant) to u8
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* Always pass the same value to free_irq() that we pass to
request_irq(). This fixes several bugs.
* Always call NCR5380_intr() with 'irq' and 'dev_id' arguments.
Note, scsi_falcon_intr() is the only case now where dev_id is not the
scsi_host.
* Always pass Scsi_Host to request_irq(). For most cases, the drivers
already did so, and I merely neated the source code line. In other
cases, either NULL or a non-sensical value was passed, verified to be
unused, then changed to be Scsi_Host in anticipation of the future.
In addition to the bugs fixes, this change makes the interface usage
consistent, which in turn enables the possibility of directly
referencing Scsi_Host from all NCR5380_intr() invocations.
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Calling zfcp_erp_strategy_check_action() after zfcp_erp_action_to_running()
in zfcp_erp_strategy() might cause an unbalanced up() for erp_ready_sem,
which makes the zfcp recovery fail somewhere along the way:
erp thread processing erp_action:
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| someone waking up erp thread for erp_action
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| | someone else dismissing erp_action:
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V V V
write_lock_irqsave(&adapter->erp_lock, flags);
...
if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) {
zfcp_erp_action_to_ready(erp_action);
up(&adapter->erp_ready_sem); /* first up() for erp_action */
}
write_unlock_irqrestore(&adapter->erp_lock, flags);
write_lock_irqsave(&adapter->erp_lock, flags);
...
zfcp_erp_action_to_running(erp_action);
write_unlock_restore(&adapter->erp_lock, flags);
/* processing erp_action */
write_lock_irqsave(&adapter->erp_lock, flags);
...
erp_action->status |= ZFCP_STATUS_ERP_DISMISSED;
if (zfcp_erp_action_exists(erp_action) ==
ZFCP_ERP_ACTION_RUNNING) {
zfcp_erp_action_to_ready(erp_action);
up(&adapter->erp_ready_sem);
/* second, unbalanced up() for erp_action */
}
...
write_unlock_restore(&adapter->erp_lock, flags);
write_lock_irqsave(&adapter->erp_lock, flags);
if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) {
zfcp_erp_action_dequeue(erp_action);
retval = ZFCP_ERP_DISMISSED;
}
...
write_unlock_restore(&adapter->erp_lock, flags);
down(&adapter->erp_ready_sem);
/* this down() is meant to balance the first up() */
The erp thread must not dismiss an erp_action after moving that action to
erp_running_head. Instead it should just go through the down() operation,
which balances the first up(), and run through zfcp_erp_strategy one more
time for the second up(), which eventually cleans up erp_action. Which
is similar to the normal processing of an event for erp_action doing
something asynchronously (e.g. waiting for the completion of an fsf_req).
This only works if we make sure that a dismissed erp_action is passed to
zfcp_erp_strategy() prior to the other action, which caused actions to be
dismissed. Therefore the patch implements this rule: running actions go to
the head of the ready list; new actions go to the tail of the ready list;
the erp thread picks actions to be processed from the ready list's head.
Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Acked-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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zfcp_erp_action_dismiss() used to ignore any actions in the ready list. This
is a bug. Any action superseded by a stronger action needs to be dismissed.
This patch changes zfcp_erp_action_dismiss() so that it dismisses actions
regardless of their list affiliation. The ERP thread is able to handle this.
It is important to kick the erp thread only for actions in the running list,
though, as an imbalance of wakeup signals would confuse the erp thread
otherwise.
Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Acked-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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- remove the unnecessary map_single path.
- convert to use the new accessors for the sg lists and the parameters.
Fixed to missing initialization of sg lists before calling
for_each_sg() by Jes Sorensen - sg list needs to be initialized before
trying to pull the elements out of it.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Currently, the iSCSI driver returns the data transfer residual for
data-in commands (e.g. read) but not data-out commands (e.g. write).
This patch makes it return the data transfer residual for both types of
commands.
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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There is a race condition in iscsi_tcp.c that may cause it to forget
that it received a R2T from the target. This race may cause a data-out
command (such as a write) to lock up. The race occurs here:
static int
iscsi_send_unsol_pdu(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
{
struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
int rc;
if (tcp_ctask->xmstate & XMSTATE_UNS_HDR) {
BUG_ON(!ctask->unsol_count);
tcp_ctask->xmstate &= ~XMSTATE_UNS_HDR; <---- RACE
...
static int
iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
{
...
tcp_ctask->xmstate |= XMSTATE_SOL_HDR_INIT; <---- RACE
...
While iscsi_xmitworker() (called from scsi_queue_work()) is preparing to
send unsolicited data, iscsi_tcp_data_recv() (called from
tcp_read_sock()) interrupts it upon receipt of a R2T from the target.
Both contexts do read-modify-write of tcp_ctask->xmstate. Usually, gcc
on x86 will make &= and |= atomic on UP (not guaranteed of course), but
in this case iscsi_send_unsol_pdu() reads the value of xmstate before
clearing the bit, which causes gcc to read xmstate into a CPU register,
test it, clear the bit, and then store it back to memory. If the recv
interrupt happens during this sequence, then the XMSTATE_SOL_HDR_INIT
bit set by the recv interrupt will be lost, and the R2T will be
forgotten.
The patch below (against 2.6.24-rc1) converts accesses of xmstate to use
set_bit, clear_bit, and test_bit instead of |= and &=. I have tested
this patch and verified that it fixes the problem. Another possible
approach would be to hold a lock during most of the rx/tx setup and
post-processing, and drop the lock only for the actual rx/tx.
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Actually there are several but one is trivially fixed
1. FSACTL_GET_NEXT_ADAPTER_FIB ioctl does not lock dev->fib_list
but needs to
2. Ditto for FSACTL_CLOSE_GET_ADAPTER_FIB
3. It is possible to construct an attack via the SRB ioctls where
the user obtains assorted elevated privileges. Various approaches are
possible, the trivial ones being things like writing to the raw media
via scsi commands and the swap image of other executing programs with
higher privileges.
So the ioctls should be CAP_SYS_RAWIO - at least all the FIB manipulating
ones. This is a bandaid fix for #3 but probably the ioctls should grow
their own capable checks. The other two bugs need someone competent in that
driver to fix them.
Signed-off-by: Alan Cox <alan@redhat.com>
Acked-by: Mark Salyzyn <mark_salyzyn@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Signed-off-by: Mark Salyzyn <aacraid@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Got a panic in the threading code on an older kernel when the Adapter
failed to load properly and driver shut down apparently before any
threading had started, can not dupe. Expect that this may be relevant in
the latest kernel, but not sure. This patch does no harm, and should
alleviate the possibility of this panic.
Signed-off-by: Mark Salyzyn <aacraid@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Noticed on PowerPC allmod config build:
drivers/scsi/aacraid/commsup.c:1342: warning: large integer implicitly truncated to unsigned type
drivers/scsi/aacraid/commsup.c:1343: warning: large integer implicitly truncated to unsigned type
drivers/scsi/aacraid/commsup.c:1344: warning: large integer implicitly truncated to unsigned type
Also fix some whitespace on the changed lines.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Mark Salyzyn <mark_salyzyn@adaptec.com>
Signed-off-by: James <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/net-2.6: (27 commits)
[INET]: Fix inet_diag dead-lock regression
[NETNS]: Fix /proc/net breakage
[TEXTSEARCH]: Do not allow zero length patterns in the textsearch infrastructure
[NETFILTER]: fix forgotten module release in xt_CONNMARK and xt_CONNSECMARK
[NETFILTER]: xt_TCPMSS: remove network triggerable WARN_ON
[DECNET]: dn_nl_deladdr() almost always returns no error
[IPV6]: Restore IPv6 when MTU is big enough
[RXRPC]: Add missing select on CRYPTO
mac80211: rate limit wep decrypt failed messages
rfkill: fix double-mutex-locking
mac80211: drop unencrypted frames if encryption is expected
mac80211: Fix behavior of ieee80211_open and ieee80211_close
ieee80211: fix unaligned access in ieee80211_copy_snap
mac80211: free ifsta->extra_ie and clear IEEE80211_STA_PRIVACY_INVOKED
SCTP: Fix build issues with SCTP AUTH.
SCTP: Fix chunk acceptance when no authenticated chunks were listed.
SCTP: Fix the supported extensions paramter
SCTP: Fix SCTP-AUTH to correctly add HMACS paramter.
SCTP: Fix the number of HB transmissions.
[TCP] illinois: Incorrect beta usage
...
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The inet_diag register fix broke inet_diag module loading because the
loaded module had to take the same mutex that's already held by the
loader in order to register the new handler.
This patch fixes it by introducing a separate mutex to protect the
handling of handlers.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Well I clearly goofed when I added the initial network namespace support
for /proc/net. Currently things work but there are odd details visible to
user space, even when we have a single network namespace.
Since we do not cache proc_dir_entry dentries at the moment we can just
modify ->lookup to return a different directory inode depending on the
network namespace of the process looking at /proc/net, replacing the
current technique of using a magic and fragile follow_link method.
To accomplish that this patch:
- introduces a shadow_proc method to allow different dentries to
be returned from proc_lookup.
- Removes the old /proc/net follow_link magic
- Fixes a weakness in our not caching of proc generic dentries.
As shadow_proc uses a task struct to decided which dentry to return we can
go back later and fix the proc generic caching without modifying any code
that uses the shadow_proc method.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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If a zero length pattern is passed then return EINVAL.
Avoids infinite loops (bm) or invalid memory accesses (kmp).
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Fix forgotten module release in xt_CONNMARK and xt_CONNSECMARK
When xt_CONNMARK is used outside the mangle table and the user specified
"--restore-mark", the connmark_tg_check() function will (correctly)
error out, but (incorrectly) forgets to release the L3 conntrack module.
Same for xt_CONNSECMARK.
Fix is to move the call to acquire the L3 module after the basic
constraint checks.
Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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ipv6_skip_exthdr() returns -1 for invalid packets. don't WARN_ON
that.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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As far as I see from the err variable initialization
the dn_nl_deladdr() routine was designed to report errors
like "EADDRNOTAVAIL" and probaby "ENODEV".
But the code sets this err to 0 after the first nlmsg_parse
and goes on, returning this 0 in any case.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Avaid provided test application, so bug got fixed.
IPv6 addrconf removes ipv6 inner device from netdev each time cmu
changes and new value is less than IPV6_MIN_MTU (1280 bytes).
When mtu is changed and new value is greater than IPV6_MIN_MTU,
it does not add ipv6 addresses and inner device bac.
This patch fixes that.
Tested with Avaid's application, which works ok now.
Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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AF_RXRPC uses the crypto services, so should depend on or select CRYPTO.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
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The attached patch rate limits "WEP decrypt failed (ICV)" to avoid
flooding the logfiles.
Signed-off-by: Adel Gadllah <adel.gadllah@gmx.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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rfkill_toggle_radio is called from functions where
rfkill->mutex is already aquired.
Remove the lock from rfkill_toggle_radio() and add it to
the only calling function that calls it without the lock held.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This patch fixes a regression I (most likely) introduced, namely that
unencrypted frames are right now accepted even if we have a key for that
specific sender. That has very bad security implications.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This patch fixes:
- Incorrect calls to ieee80211_hw_config when the radiotap flag is set.
- Failure to actually unset the radiotap flag when all monitors are down.
- Failure to call ieee80211_hw_config after successful interface start.
Signed-off-by: Michael Wu <flamingice@sourmilk.net>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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There is no guarantee that data+SNAP_SIZE will reside on an even numbered
address, so doing a 16 bit read will cause an unaligned access in some
situations. Based on a patch from Jun Sun.
Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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I'm not sure if this is best choice, someone might have better
solutions. But this patch fixed the connection problem when switching
from a WPA enabled AP (using wpa_supplicant) to an open AP (using
iwconfig). The root cause is when we connect to a WPA enabled AP,
wpa_supplicant sets the ifsta->extra_ie thru SIOCSIWGENIE. But if we
stop wpa_supplicant and connect to an open AP with iwconfig, there is
no way to clear the extra_ie so that mac80211 keeps connecting with that.
Someone could argue wpa_supplicant should clear the extra_ie during
its shutdown. But mac80211 should also handle the unexpected shutdown
case (ie. killall -9 wpa_supplicant).
On Wed, 2007-11-21 at 16:19 +0100, Johannes Berg wrote:
> Yeah. Can you amend the patch to also clear the
> IEEE80211_STA_PRIVACY_INVOKED flag?
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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SCTP-AUTH requires selection of CRYPTO, HMAC and SHA1 since
SHA1 is a MUST requirement for AUTH. We also support SHA256,
but that's optional, so fix the code to treat it as such.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
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In the case where no autheticated chunks were specified, we were still
trying to verify that a given chunk needs authentication and doing so
incorrectly. Add a check for parameter length to make sure we don't
try to use an empty auth_chunks parameter to verify against.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
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Supported extensions parameter was not coded right and ended up
over-writing memory or causing skb overflows. First, remove
the FWD_TSN support from as it shouldn't be there and also fix
the paramter encoding.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
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There was a typo that cleared the HMACS parameters when no
authenticated chunks were specified. We whould be clearing
the chunks pointer instead of the hmacs.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
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Our treatment of Heartbeats is special in that the inital HB chunk
counts against the error count for the association, where as for
other chunks, only retransmissions or timeouts count against us.
As a result, we had an off-by-1 situation with a number of
Heartbeats we could send.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
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Lachlan Andrew observed that my TCP-Illinois implementation uses the
beta value incorrectly:
The parameter beta in the paper specifies the amount to decrease
*by*: that is, on loss,
W <- W - beta*W
but in tcp_illinois_ssthresh() uses beta as the amount
to decrease *to*: W <- beta*W
This bug makes the Linux TCP-Illinois get less-aggressive on uncongested network,
hurting performance. Note: since the base beta value is .5, it has no
impact on a congested network.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Andrew Morton reported that __xfrm_lookup generates this warning:
net/xfrm/xfrm_policy.c: In function '__xfrm_lookup':
net/xfrm/xfrm_policy.c:1449: warning: 'dst' may be used uninitialized in this function
This is because if policy->action is of an unexpected value then dst will
not be initialised. Of course, in practice this should never happen since
the input layer xfrm_user/af_key will filter out all illegal values. But
the compiler doesn't know that of course.
So this patch fixes this by taking the conservative approach and treat all
unknown actions the same as a blocking action.
Thanks to Andrew for finding this and providing an initial fix.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The following race is possible when one cpu unregisters the handler
while other one is trying to receive a message and call this one:
CPU1: CPU2:
inet_diag_rcv() inet_diag_unregister()
mutex_lock(&inet_diag_mutex);
netlink_rcv_skb(skb, &inet_diag_rcv_msg);
if (inet_diag_table[nlh->nlmsg_type] ==
NULL) /* false handler is still registered */
...
netlink_dump_start(idiagnl, skb, nlh,
inet_diag_dump, NULL);
cb = kzalloc(sizeof(*cb), GFP_KERNEL);
/* sleep here freeing memory
* or preempt
* or sleep later on nlk->cb_mutex
*/
spin_lock(&inet_diag_register_lock);
inet_diag_table[type] = NULL;
... spin_unlock(&inet_diag_register_lock);
synchronize_rcu();
/* CPU1 is sleeping - RCU quiescent
* state is passed
*/
return;
/* inet_diag_dump is finally called: */
inet_diag_dump()
handler = inet_diag_table[cb->nlh->nlmsg_type];
BUG_ON(handler == NULL);
/* OOPS! While we slept the unregister has set
* handler to NULL :(
*/
Grep showed, that the register/unregister functions are called
from init/fini module callbacks for tcp_/dccp_diag, so it's OK
to use the inet_diag_mutex to synchronize manipulations with the
inet_diag_table and the access to it.
Besides, as Herbert pointed out, asynchronous dumps should hold
this mutex as well, and thus, we provide the mutex as cb_mutex one.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This hook is protected with the RCU, so simple
if (br_should_route_hook)
br_should_route_hook(...)
is not enough on some architectures.
Use the rcu_dereference/rcu_assign_pointer in this case.
Fixed Stephen's comment concerning using the typeof().
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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In case the br_netfilter_init() (or any subsequent call)
fails, the br_fdb_fini() must be called to free the allocated
in br_fdb_init() br_fdb_cache kmem cache.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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I am not absolutely sure whether this actually is a bug (as in: I've got
no clue what the standards say or what other implementations do), but at
least I was pretty surprised when I noticed that a recv() on a
non-blocking unix domain socket of type SOCK_SEQPACKET (which is connection
oriented, after all) where the remote end has closed the connection
returned -1 (EAGAIN) rather than 0 to indicate end of file.
This is a test case:
| #include <sys/types.h>
| #include <unistd.h>
| #include <sys/socket.h>
| #include <sys/un.h>
| #include <fcntl.h>
| #include <string.h>
| #include <stdlib.h>
|
| int main(){
| int sock;
| struct sockaddr_un addr;
| char buf[4096];
| int pfds[2];
|
| pipe(pfds);
| sock=socket(PF_UNIX,SOCK_SEQPACKET,0);
| addr.sun_family=AF_UNIX;
| strcpy(addr.sun_path,"/tmp/foobar_testsock");
| bind(sock,(struct sockaddr *)&addr,sizeof(addr));
| listen(sock,1);
| if(fork()){
| close(sock);
| sock=socket(PF_UNIX,SOCK_SEQPACKET,0);
| connect(sock,(struct sockaddr *)&addr,sizeof(addr));
| fcntl(sock,F_SETFL,fcntl(sock,F_GETFL)|O_NONBLOCK);
| close(pfds[1]);
| read(pfds[0],buf,sizeof(buf));
| recv(sock,buf,sizeof(buf),0); // <-- this one
| }else accept(sock,NULL,NULL);
| exit(0);
| }
If you try it, make sure /tmp/foobar_testsock doesn't exist.
The marked recv() returns -1 (EAGAIN) on 2.6.23.9. Below you find a
patch that fixes that.
Signed-off-by: Florian Zumbiehl <florz@florz.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Fix misbehavior of vlan_dev_hard_start_xmit() for recursive encapsulations.
Signed-off-by: Joonwoo Park <joonwpark81@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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sungem's gem_reset_task() will unconditionally try to disable NAPI even
when it's called while the interface is not operating and hence the NAPI
struct isn't enabled. Make napi_disable() depend on gp->running.
Also removes a superfluous test of gp->running in the same function.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (48 commits)
LIB82596: correct data types for hardware addresses
via-velocity: don't oops on MTU change (resend)
Stop phy code from returning success to unknown ioctls.
SET_NETDEV_DEV() in fec_mpc52xx.c
net: smc911x: only enable for mpr2 on sh.
e1000: Fix NAPI state bug when Rx complete
sky2: turn of dynamic Tx watermark workaround (FE+ only)
sky2: don't use AER routines
sky2: revert to access PCI config via device space
cxgb - fix stats
cxgb - fix NAPI
cxgb - fix T2 GSO
ucc_geth: handle passing of RX-only and TX-only internal delay PHY connection type parameters
phylib: marvell: add support for TX-only and RX-only Internal Delay
phylib: add PHY interface modes for internal delay for tx and rx only
skge: MTU changing fix
skge: serial mode register values
skge version 1.13
skge: increase TX threshold for Jumbo
skge: fiber link up/down fix
...
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dma_addr_t is 64bit wide on some architectures (for example 64bit MIPS),
so it's not a good idea to use it for 32bit wide addresses in descriptors.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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The VIA veloicty driver needs the following to allow changing MTU when down.
The buffer size needs to be computed when device is brought up, not when
device is initialized. This also fixes a bug where the buffer size was
computed differently on change_mtu versus initial setting.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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This kind of sucks, and prevents the Fedora installer from using the
device for network installs...
[root@efika phy]# iwconfig eth0
Warning: Driver for device eth0 has been compiled with an ancient version
of Wireless Extension, while this program support version 11 and later.
Some things may be broken...
eth0 ESSID:off/any Nickname:""
NWID:0 Channel:0 Access Point: 00:00:BF:81:14:E0
Bit Rate:-1.08206e+06 kb/s Sensitivity=0/0
RTS thr:off Fragment thr:off
Encryption key:<too big>
Power Management:off
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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This helps to allow the Fedora installer to use the built-in Ethernet on
the Efika for a network install.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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The smc911x.h is a bit of a mess, not supporting any sort of generic
configuration. For the moment only ARCH_PXA and SH_MAGIC_PANEL_R2 have
suitable definitions, so we reflect this in the Kconfig also.
While there are other SH boards that will likely turn this on in the
2.6.25 time frame, it's not worth trying to stub around at the moment.
Fixes up the allmodconfig build, as noted by akpm.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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Don't exit polling when we have not yet used our budget, this causes
the NAPI system to end up with a messed up poll list.
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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Add workaround for issues FE+ (A0) transmit watermark.
This is copied verbatim from vendor driver sk98lin (10.22.4.3).
Don't have that chip version and no more information seems to be available.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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