in qfq_deactivate_agg
to keep qfq+ work-conserving.
Signed-off-by: Paolo Valente
Reviewed-by: Fabio Checconi
---
net/sched/sch_qfq.c | 66 +++
1 file changed, 45 insertions(+), 21 deletions(-)
diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
index 6ed3
the comment to
the function slot_insert.
[1] http://marc.info/?l=linux-netdev&m=134968777902077&w=2
[2] http://marc.info/?l=linux-netdev&m=135096573507936&w=2
[3] http://marc.info/?l=linux-netdev&m=134902691421670&w=2
Signed-off-by: Paolo Valente
---
ne
Il 29/10/2012 12:08, Cong Wang ha scritto:
On 10/29/2012 04:51 PM, Paolo Valente wrote:
Hi,
if the max packet size for some class (configured through tc) is
violated by the actual size of the packets of that class, then QFQ
would not schedule classes correctly, and the data structures
case described in the comment to
the function slot_insert.
[1] http://marc.info/?l=linux-netdev&m=134968777902077&w=2
[2] http://marc.info/?l=linux-netdev&m=135096573507936&w=2
[3] http://marc.info/?l=linux-netdev&m=134902691421670&w=2
Signed-off-by: Paolo Valente
Tested
operties of the mask.
It is in the first patch.
> 2) That static inline forward declaration is ugly, better to remove
> the inline tag (let the compiler handle it) or move the function
> above all the call sites.
>
Done by the second patch.
Paolo Valente (2):
pkt_sched
This patch removes the forward declaration of qfq_update_agg_ts, by moving
the definition of the function above its first call. This patch also
removes a useless forward declaration of qfq_schedule_agg.
Reported-by: David S. Miller
Signed-off-by: Paolo Valente
---
net/sched/sch_qfq.c | 118
.
Reported-by: David S. Miller
Reported-by: David Laight
Signed-off-by: Paolo Valente
---
net/sched/sch_qfq.c | 9 -
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
index d51852b..2a0ed50 100644
--- a/net/sched/sch_qfq.c
+++ b/net
/agg-sched.pdf
[2] http://algo.ing.unimo.it/people/paolo/agg-sched/test-env.tgz
Signed-off-by: Paolo Valente
---
net/sched/sch_qfq.c | 832 +++
1 file changed, 570 insertions(+), 262 deletions(-)
diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
index
] http://marc.info/?l=linux-netdev&m=134968777902077&w=2
[2] http://marc.info/?l=linux-netdev&m=135096573507936&w=2
[3] http://marc.info/?l=linux-netdev&m=134902691421670&w=2
Signed-off-by: Paolo Valente
Tested-by: Cong Wang
Acked-by: Stephen Hemminger
---
ne
rom qfq_deactivate_agg
There is no need to invoke qfq_update_eligible in qfq_deactivate_agg
to keep qfq+ work-conserving.
Signed-off-by: Paolo Valente
---
net/sched/sch_qfq.c | 72 +++
1 file changed, 49 insertions(+), 23 deletions(-)
diff --git a/
Il 20/11/2012 00:48, David Miller ha scritto:
From: Paolo Valente
Date: Mon, 12 Nov 2012 17:48:33 +0100
[This patch received positive feedback from Stephen Hemminger ("put in
net-next"), but no further feedback or decision. So I am (re)sending
an updated version of it. The only d
o.ing.unimo.it/people/paolo/agg-sched/test-env.tgz
Signed-off-by: Paolo Valente
---
net/sched/sch_qfq.c | 834 +++
1 file changed, 571 insertions(+), 263 deletions(-)
diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
index 9687fa1..fe1823a 10
to
make it coherent with the fact that the weight sum used by QFQ+ can
now be lower than the maximum possible value.
[1] P. Valente, "Extending WF2Q+ to support a dynamic traffic mix",
Proceedings of AAA-IDEA'05, June 2005.
Signed-off-by: Paolo Val
to
make it coherent with the fact that the weight sum used by QFQ+ can
now be lower than the maximum possible value.
[1] P. Valente, "Extending WF2Q+ to support a dynamic traffic mix",
Proceedings of AAA-IDEA'05, June 2005.
Signed-off-by: Paolo Val
Il 15/07/2013 20:12, Joe Perches ha scritto:
On Mon, 2013-07-15 at 20:01 +0200, Paolo Valente wrote:
QFQ+ inherits from QFQ a design choice that may cause a high packet
delay/jitter and a severe short-term unfairness.
[]
diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
[]
@@ -189,6
Il 26/02/2013 23:37, David Miller ha scritto:
> From: Paolo valente
> Date: Tue, 26 Feb 2013 18:02:46 +0100
>
>> The portions of the code interested by each fix are small and do not
>> overlap with each other, so I decided to provide just one patch
>> (I hope tha
ff-by: Paolo Valente
Reviewed-by: Fabio Checconi
---
net/sched/sch_qfq.c | 13 +++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
index 6ed3765..0f6e2db 100644
--- a/net/sched/sch_qfq.c
+++ b/net/sched/sch_qfq.c
@@ -299,6 +2
ust replaces 1UL with 1ULL.
Signed-off-by: Paolo Valente
Reviewed-by: Fabio Checconi
---
net/sched/sch_qfq.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
index 0f6e2db..4cbbf79 100644
--- a/net/sched/sch_qfq.c
+++ b/net/sched/sch_qf
qfq_dequeue(), to
reschedule an aggregate that finishes its budget, then the aggregate
is now rescheduled by invoking directly the functions needed.
Signed-off-by: Paolo Valente
Reviewed-by: Fabio Checconi
---
net/sched/sch_qfq.c | 36 ++--
1 file changed, 22
latter would
wrap around.
This fix prevents the budget from wrapping around after any packet
dequeue.
Signed-off-by: Paolo Valente
Reviewed-by: Fabio Checconi
---
net/sched/sch_qfq.c | 10 +-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/net/sched/sch_qfq.c b/net/sched
to be work conserving,
because update_eligible() is always invoked also at the beginning of
qfq_choose_next_agg(). This patch removes the additional invocation of
update_eligible() in qfq_deactivate_agg().
Signed-off-by: Paolo Valente
Reviewed-by: Fabio Checconi
---
net/sched/sch_qfq.c |2 --
1 fi
rrently in service is eligible. As a consequence, to
decide whether there is no eligible aggregate, QFQ+ must also check
whether there is no aggregate in service.
Signed-off-by: Paolo Valente
Reviewed-by: Fabio Checconi
---
net/sched/sch_qfq.c |3 ++-
1 file changed, 2 insertions(+), 1 deletio
-off-by: Paolo Valente
---
net/sched/sch_qfq.c | 95 +--
1 file changed, 69 insertions(+), 26 deletions(-)
diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
index 9af01f3..e4723d3 100644
--- a/net/sched/sch_qfq.c
+++ b/net/sched/sch_qfq.c
value of the ratio
max_class_pkt/weight_of_the_class with respect to that of
cl. Inserting a class with a too high start time into the bucket list
corrupts the data structure and may eventually lead to crashes.
This patch limits the maximum start time assigned to a class.
Signed-off-by: Paolo Valente
for other classes.
This patch adds the missing operations.
Signed-off-by: Paolo Valente
---
net/sched/sch_qfq.c | 95 +--
1 file changed, 69 insertions(+), 26 deletions(-)
diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
index 9af01f3
Il 20/11/2012 19:54, David Miller ha scritto:
From: Paolo Valente
Date: Tue, 20 Nov 2012 18:45:13 +0100
- struct sk_buff *skb;
+ struct sk_buff *skb = NULL;
This is not really an improvement,
Sorry for trying this silly short cut
now the compiler can think
that NULL is passed
, can be found in [1].
[1] P. Valente, "Reducing the Execution Time of Fair-Queueing Schedulers"
http://algo.ing.unimo.it/people/paolo/agg-sched/agg-sched.pdf
Signed-off-by: Paolo Valente
---
net/sched/sch_qfq.c | 833 +++
1 file ch
Il 23/11/2012 20:28, David Miller ha scritto:
From: Paolo Valente
Date: Thu, 22 Nov 2012 17:56:20 +0100
+/*
+
+ */
Please don't add useless things like this in your patch.
Sorry, I forgot to remove it after I moved the body of the comment to a
better place. I have fixed and checked
, can be found in [1].
[1] P. Valente, "Reducing the Execution Time of Fair-Queueing Schedulers"
http://algo.ing.unimo.it/people/paolo/agg-sched/agg-sched.pdf
Signed-off-by: Paolo Valente
---
net/sched/sch_qfq.c | 830 +++
1 file ch
nimo.it/people/paolo/agg-sched/test-env.tgz
Signed-off-by: Paolo Valente
---
net/sched/sch_qfq.c | 826 ---
1 file changed, 592 insertions(+), 234 deletions(-)
diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
index 211a212..af8f2a2 100644
-
Il 01/10/2012 17:31, Stephen Hemminger ha scritto:
On Sun, 30 Sep 2012 19:40:49 +0200
Paolo Valente wrote:
Hi,
this patch turns QFQ into QFQ+, a faster variant of QFQ that groups
classes into aggregates, and uses the original QFQ scheduling
algorithm to schedule aggregates instead of single
Il 01/10/2012 17:31, Stephen Hemminger ha scritto:
On Sun, 30 Sep 2012 19:40:49 +0200
Paolo Valente wrote:
Hi,
this patch turns QFQ into QFQ+, a faster variant of QFQ that groups
classes into aggregates, and uses the original QFQ scheduling
algorithm to schedule aggregates instead of single
Il giorno 01/ott/2012, alle ore 19:52, Stephen Hemminger ha scritto:
> On Mon, 01 Oct 2012 19:46:41 +0200
> Paolo Valente wrote:
>
>> Il 01/10/2012 17:31, Stephen Hemminger ha scritto:
>>> On Sun, 30 Sep 2012 19:40:49 +0200
>>> Paolo Valente wrote:
>>>
rq = cfqq->next_rq;
> + else
> + cfq_log_cfqq(cfqq->cfqd, cfqq, "fifo=%p", rq);
>
> /*
>* insert request into driver dispatch list
> @@ -3989,7 +3996,7 @@ cfq_should_preempt(struct cfq_data *cfqd, struct
> cfq_queue *new_cfqq
reason, BFQ implements
hierarchical scheduling in such an accurate way to fully preserve its
tight service guarantees.
This commit removes CFQ's hierarchical support, while one of the next
commit then adds BFQ's one.
Signed-off-by: Arianna Avanzini
Signed-off-by: Paolo Valente
Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 99 +
1 file changed, 1 insertion(+), 98 deletions(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index fab01e2..174dc94 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq
-off-by: Arianna Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 131 +++-
1 file changed, 26 insertions(+), 105 deletions(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 174dc94..df8fb826 100644
--- a/block/cfq
warnings. The commit
introducing low-latency heuristics in BFQ then restores only the
boolean low_latency tunable.
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 31 +++
1 file changed, 19 insertions(+), 12 deletions(-)
diff --git a/block/cfq-iosched.c b/block/cfq
rkload type
block, bfq: add full hierarchical scheduling and cgroups support
block, bfq: add Early Queue Merge (EQM)
block, bfq: reduce idling only in symmetric scenarios
block, bfq: handle bursts of queue activations
Fabio Checconi (1):
block, cfq: replace CFQ with the BFQ-v0 I/O scheduler
Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 13 -
1 file changed, 13 deletions(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 18a7291..1b9fa10 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -2677,12 +2677,6 @@ static inline sector_t
-by: Mauro Andreolini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 738 +---
1 file changed, 707 insertions(+), 31 deletions(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 980d321..27b51a7 100644
--- a/block/cfq-iosched.c
+++ b
the 5th Annual International Systems and Storage Conference
(SYSTOR '12), June 2012.
Slightly extended version:
http://algogroup.unimore.it/people/paolo/disk_sched/bfq-v1-suite-
results.pdf
Signed-off-by: Paolo Valen
t, we also explain in
even more detail why the heuristic removed in this commit fails with
an irregularly interleaved I/O.
Signed-off-by: Arianna Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 349 +---
1 file changed, 4 insertio
roup.unimore.it/people/paolo/disk_sched/bfq-v1-suite-
results.pdf
Signed-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
---
block/cfq-iosched.c | 83 ++---
1 file changed, 41 insertions(+
one. Along the same line, if there are weight-raised queues,
then this patch halves the service rate of async (write) requests for
non-weight-raised queues.
Signed-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
---
block/cfq-iosched.c | 66
f the throughput. In this case, to
guarantee the desired throughput distribution, the device must be
prevented from prefetching requests. This is exactly what this patch
does in asymmetric scenarios.
Signed-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
---
block/cfq-iosched.c
belonging to these bursts.
Signed-off-by: Arianna Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 399 ++--
1 file changed, 388 insertions(+), 11 deletions(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index ae17421
.
http://algogroup.unimore.it/people/paolo/disk_sched/mst-2015.pdf
Signed-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
---
block/Kconfig.iosched | 3 +-
block/cfq-iosched.c | 752 --
2 files changed, 676 insertions(+), 79 deletions(-)
diff --g
ned-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
---
block/Kconfig.iosched |7 +
block/cfq-iosched.c | 1837 +++--
2 files changed, 1648 insertions(+), 196 deletions(-)
diff --git a/block/Kconfig.iosched b/block/Kconfig.iosched
ind
all actions
are aimed at boosting the throughput, except for when
throughput-boosting actions would jeopardize throughput-distribution
and latency guarantees. Full details in the commits turning CFQ into
BFQ.
Signed-off-by: Arianna Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c |
strong
throughput-distribution and latency guarantees. This commit then
removes the CFQ mechanism.
Signed-off-by: Arianna Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 18 ++
1 file changed, 2 insertions(+), 16 deletions(-)
diff --git a/block/cfq-iosched.c b/block
the First Workshop on Mobile System
Technologies (MST-2015), May 2015.
http://algogroup.unimore.it/people/paolo/disk_sched/mst-2015.pdf
Signed-off-by: Arianna Avanzini
Signed-off-by: Riccardo Pizzetti
Signed-off-by: Samuele Zecchini
Signed-off-by: Paolo Valente
---
block/cfq-iosch
w-pass filter
should converge more or less quickly to the right value.
With the current values of the constants used in the filter, the
latter seems to effectively smooth fluctuations and allow the
estimator to converge to the actual peak rate with all the devices we
tested.
Signed-off-by: Paolo Va
sk_sched/bfq-v1-suite-
results.pdf
Signed-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
---
block/cfq-iosched.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index b
disabling idling boosts the throughput on
NCQ-capable rotational devices. To not break service guarantees,
idling is disabled for NCQ-enabled rotational devices only when the
same symmetry conditions considered in the previous patches hold.
Signed-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
ony
requirements, then the end of the weight-raising period for the queue
is moved forward, and so on. Note that an application whose associated
queue never happens to be empty when it expires will never have the
opportunity to be deemed as soft real-time.
Signed-off-by: Paolo Valente
Signed-off
fs.h |3
> include/linux/wbt.h | 120 ++
> include/linux/writeback.h | 10
> include/trace/events/wbt.h | 153
> lib/Kconfig |3
> lib/Makefile|1
> lib/wbt.c
Il giorno 08/ago/2016, alle ore 22:09, Omar Sandoval ha
scritto:
> On Mon, Aug 08, 2016 at 04:09:56PM +0200, Paolo wrote:
>> Hi Jens, Tejun, Christoph, all,
>> AFAIK blk-mq does not yet feature I/O schedulers. In particular, there
>> is no scheduler providing strong guarantees in terms of
>> re
sk_sched/bfq-v1-suite-
results.pdf
Signed-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
---
block/cfq-iosched.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 9
all actions
are aimed at boosting the throughput, except for when
throughput-boosting actions would jeopardize throughput-distribution
and latency guarantees. Full details in the commits turning CFQ into
BFQ.
Signed-off-by: Arianna Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c |
disabling idling boosts the throughput on
NCQ-capable rotational devices. To not break service guarantees,
idling is disabled for NCQ-enabled rotational devices only when the
same symmetry conditions considered in the previous patches hold.
Signed-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
belonging to these bursts.
Signed-off-by: Arianna Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 401 ++--
1 file changed, 389 insertions(+), 12 deletions(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 50dab96
.
http://algogroup.unimore.it/people/paolo/disk_sched/mst-2015.pdf
Signed-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
---
block/Kconfig.iosched | 3 +-
block/cfq-iosched.c | 762 --
2 files changed, 681 insertions(+), 84 deletions(-)
diff --g
-by: Mauro Andreolini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 738 +---
1 file changed, 707 insertions(+), 31 deletions(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index d137ed2..cb0b44b 100644
--- a/block/cfq-iosched.c
+++ b
ned-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
---
block/Kconfig.iosched |7 +
block/cfq-iosched.c | 1825 -
2 files changed, 1650 insertions(+), 182 deletions(-)
diff --git a/block/Kconfig.iosched b/block/Kconfig.iosched
ind
the 5th Annual International Systems and Storage Conference
(SYSTOR '12), June 2012.
Slightly extended version:
http://algogroup.unimore.it/people/paolo/disk_sched/bfq-v1-suite-
results.pdf
Signed-off-by: Paolo Valen
f the throughput. In this case, to
guarantee the desired throughput distribution, the device must be
prevented from prefetching requests. This is exactly what this patch
does in asymmetric scenarios.
Signed-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
---
block/cfq-iosched.c
w-pass filter
should converge more or less quickly to the right value.
With the current values of the constants used in the filter, the
latter seems to effectively smooth fluctuations and allow the
estimator to converge to the actual peak rate with all the devices we
tested.
Signed-off-by: Paolo Va
Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 13 -
1 file changed, 13 deletions(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 10761b5..1ab8898 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -2696,12 +2696,6 @@ static inline sector_t
Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 99 +
1 file changed, 1 insertion(+), 98 deletions(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index afe42fc..5e0daaf 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq
roup.unimore.it/people/paolo/disk_sched/bfq-v1-suite-
results.pdf
Signed-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
---
block/cfq-iosched.c | 83 ++---
1 file changed, 41 insertions(+
strong
throughput-distribution and latency guarantees. This commit then
removes the CFQ mechanism.
Signed-off-by: Arianna Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 18 ++
1 file changed, 2 insertions(+), 16 deletions(-)
diff --git a/block/cfq-iosched.c b/block
reason, BFQ implements
hierarchical scheduling in such an accurate way to fully preserve its
tight service guarantees.
This commit removes CFQ's hierarchical support, while one of the next
commit then adds BFQ's one.
Signed-off-by: Arianna Avanzini
Signed-off-by: Paolo Valente
t, we also explain in
even more detail why the heuristic removed in this commit fails with
an irregularly interleaved I/O.
Signed-off-by: Arianna Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 349 +---
1 file changed, 4 insertio
ony
requirements, then the end of the weight-raising period for the queue
is moved forward, and so on. Note that an application whose associated
queue never happens to be empty when it expires will never have the
opportunity to be deemed as soft real-time.
Signed-off-by: Paolo Valente
Signed-off
one. Along the same line, if there are weight-raised queues,
then this patch halves the service rate of async (write) requests for
non-weight-raised queues.
Signed-off-by: Paolo Valente
Signed-off-by: Arianna Avanzini
---
block/cfq-iosched.c | 66
warnings. The commit
introducing low-latency heuristics in BFQ then restores only the
boolean low_latency tunable.
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 36
1 file changed, 20 insertions(+), 16 deletions(-)
diff --git a/block/cfq-iosched.c b/block
the First Workshop on Mobile System
Technologies (MST-2015), May 2015.
http://algogroup.unimore.it/people/paolo/disk_sched/mst-2015.pdf
Signed-off-by: Arianna Avanzini
Signed-off-by: Riccardo Pizzetti
Signed-off-by: Samuele Zecchini
Signed-off-by: Paolo Valente
---
block/cfq-iosch
-off-by: Arianna Avanzini
Signed-off-by: Paolo Valente
---
block/cfq-iosched.c | 131 +++-
1 file changed, 26 insertions(+), 105 deletions(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 5e0daaf..329ed2b 100644
--- a/block/cfq
get rid of hierarchical support
block, cfq: get rid of queue preemption
block, cfq: get rid of workload type
block, bfq: add full hierarchical scheduling and cgroups support
block, bfq: add Early Queue Merge (EQM)
block, bfq: reduce idling only in symmetric scenarios
block, bfq: handle bursts o
difference, that the serialization caused by this lock has a
little impact (at most ~5% of throughput reduction).
[1] https://github.com/Algodev-github/IOSpeed
Tested-by: Lee Tibbert
Tested-by: Oleksandr Natalenko
Signed-off-by: Paolo Valente
Signed-off-by: Luca Miccio
---
Documentation/block/bfq
Signed-off-by: Paolo Valente
Signed-off-by: Luca Miccio
---
Documentation/block/bfq-iosched.txt | 17 +++--
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/Documentation/block/bfq-iosched.txt
b/Documentation/block/bfq-iosched.txt
index 3d6951d..7a93615 100644
--- a
: Oleksandr Natalenko
Signed-off-by: Luca Miccio
Signed-off-by: Paolo Valente
---
Documentation/block/bfq-iosched.txt | 38 +++--
block/bfq-cgroup.c | 148
block/bfq-iosched.c | 14 ++--
block/bfq-iosched.h
ml
[2] https://github.com/Algodev-github/IOSpeed
Luca Miccio (2):
block, bfq: add missing invocations of bfqg_stats_update_io_add/remove
block, bfq: move debug blkio stats behind CONFIG_DEBUG_BLK_CGROUP
Paolo Valente (2):
doc, block, bfq: update max IOPS sustainable with BFQ
block, bfq: u
that are inserted into or extracted from its priority
dispatch list. This commit fixes this mistake.
Tested-by: Lee Tibbert
Tested-by: Oleksandr Natalenko
Signed-off-by: Paolo Valente
Signed-off-by: Luca Miccio
---
block/bfq-iosched.c | 21 ++---
1 file changed, 18 insertions
> Il giorno 28 dic 2017, alle ore 15:00, Holger Hoffstätte
> ha scritto:
>
>
> On 12/28/17 12:19, Paolo Valente wrote:
> (snip half a tech report ;)
>
> So either this or the previous patch ("limit tags for writes and async I/O"
> can lead to a hard,
> Il giorno 12 gen 2018, alle ore 11:15, Holger Hoffstätte
> ha scritto:
>
> On 01/12/18 06:58, Paolo Valente wrote:
>>
>>
>>> Il giorno 28 dic 2017, alle ore 15:00, Holger Hoffstätte
>>> ha scritto:
>>>
>>>
>>>
the
allowed weight-raising period finishes. Thus this early ending of
weight-raising reduces the amount of time during which these
applications cause the problems described above.
Tested-by: Oleksandr Natalenko
Tested-by: Holger Hoffstätte
Signed-off-by: Paolo Valente
---
block/bfq-iosched.c
it
somehow to the other schedulers.
Thanks,
Paolo
[1] https://www.spinics.net/lists/linux-block/msg21586.html
Paolo Valente (2):
block, bfq: limit tags for writes and async I/O
block, bfq: limit sectors served with interactive weight raising
block/bfq-iosch
[1] https://github.com/Algodev-github/S
Tested-by: Oleksandr Natalenko
Tested-by: Holger Hoffstätte
Signed-off-by: Paolo Valente
---
block/bfq-iosched.c | 77 +
block/bfq-iosched.h | 12 +
2 files changed, 89 insertions(+)
diff --git a
> Il giorno 30 gen 2018, alle ore 15:40, Ming Lei ha
> scritto:
>
> On Tue, Jan 30, 2018 at 03:30:28PM +0100, Oleksandr Natalenko wrote:
>> Hi.
>>
> ...
>> systemd-udevd-271 [000] 4.311033: bfq_insert_requests: insert
>> rq->0
>> systemd-udevd-271 [000] ...1 4.311037: blk
Hi Tejun, Jens, all,
the shares of storage resources are controlled through weights in the
proportional-share policy of the blkio/io controllers of the cgroups
subsystem. But, on blk-mq, this control doesn't work for any legacy
application, service or tool. In a similar vein, in most of the
inter
> Il giorno 13 gen 2018, alle ore 12:05, Paolo Valente
> ha scritto:
>
> Hi Jens,
> here are again the two pending patches you asked me to resend [1]. One
> of them, fixing read-starvation problems, was accompanied by a cover
> letter. I'm pasting the content
Hi Jens,
these two patches fix two related memory leaks, the first reported in
[1], and the second found by ourselves while fixing the first.
Thanks,
Paolo
[1] https://www.mail-archive.com/linux-block@vger.kernel.org/msg16258.html
Paolo Valente (2):
block, bfq: put async queues for root bfq
Ferrari
Signed-off-by: Paolo Valente
---
block/bfq-iosched.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index ea48b5c8f088..c56a495af2e8 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -5015,6 +5015,9 @@ static void bfq_exit_queue
root group.
This commit fixes bfq_pd_offline so that the latter executes the above
missing operations for a root group too.
Reported-by: Holger Hoffstätte
Reported-by: Guoqing Jiang
Signed-off-by: Davide Ferrari
Signed-off-by: Paolo Valente
---
block/bfq-cgroup.c | 7 +--
1 file changed, 5
Ferrari
Signed-off-by: Paolo Valente
---
block/bfq-iosched.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index ea48b5c8f088..c56a495af2e8 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -5015,6 +5015,9 @@ static void bfq_exit_queue
Paolo Valente (2):
block, bfq: put async queues for root bfq groups too
block, bfq: release oom-queue ref to root group on exit
block/bfq-cgroup.c | 7 +--
block/bfq-iosched.c | 3 +++
2 files changed, 8 insertions(+), 2 deletions(-)
--
2.15.1
root group.
This commit fixes bfq_pd_offline so that the latter executes the above
missing operations for a root group too.
Reported-by: Holger Hoffstätte
Reported-by: Guoqing Jiang
Signed-off-by: Davide Ferrari
Signed-off-by: Paolo Valente
---
block/bfq-cgroup.c | 7 +--
1 file changed, 5
> Il giorno 09 gen 2018, alle ore 20:53, Jens Axboe ha
> scritto:
>
> On 1/9/18 12:52 PM, Tejun Heo wrote:
>> Hello, Paolo.
>>
>> On Thu, Jan 04, 2018 at 08:00:02PM +0100, Paolo Valente wrote:
>>> The solution for the second type of parameters
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