cmd = megasas_get_cmd_fusion(instance, scmd->request->tag);
` Kashyap
> -Original Message-
> From: Kashyap Desai [mailto:kashyap.de...@broadcom.com]
> Sent: Tuesday, November 01, 2016 11:11 AM
> To: 'Jens Axboe'; 'Omar Sandoval'
> Cc: 'linux-s...@vger.kernel.org'; 'linux
d.org; linux-block@vger.kernel.org; paolo.vale...@linaro.org
> Subject: Re: Device or HBA level QD throttling creates randomness in
> sequetial workload
>
> On 01/30/2017 09:30 AM, Bart Van Assche wrote:
> > On Mon, 2017-01-30 at 19:22 +0530, Kashyap Desai wrote:
> >&
> Hi, Kashyap,
>
> I'm CC-ing Kent, seeing how this is his code.
Hi Jeff and Kent, See my reply inline.
>
> Kashyap Desai <kashyap.de...@broadcom.com> writes:
>
> > Objective of this patch is -
> >
> > To move code used in bcache module in block
> -Original Message-
> From: linux-scsi-ow...@vger.kernel.org [mailto:linux-scsi-
> ow...@vger.kernel.org] On Behalf Of Jens Axboe
> Sent: Thursday, November 10, 2016 10:18 PM
> To: Hannes Reinecke; Christoph Hellwig
> Cc: SCSI Mailing List; linux-block@vger.kernel.org
> Subject: Re:
>
> On Fri, Oct 21, 2016 at 05:43:35PM +0530, Kashyap Desai wrote:
> > Hi -
> >
> > I found below conversation and it is on the same line as I wanted some
> > input from mailing list.
> >
> > http://marc.info/?l=linux-kernel=147569860526197=2
> &
> -Original Message-
> From: Omar Sandoval [mailto:osan...@osandov.com]
> Sent: Monday, October 24, 2016 9:11 PM
> To: Kashyap Desai
> Cc: linux-s...@vger.kernel.org; linux-ker...@vger.kernel.org; linux-
> bl...@vger.kernel.org; ax...@kernel.dk; Christoph Hel
workaround/alternative in latest upstream kernel, if user
wants to see limited penalty for Sequential Work load on HDD ?
` Kashyap
> -Original Message-
> From: Kashyap Desai [mailto:kashyap.de...@broadcom.com]
> Sent: Thursday, October 20, 2016 3:39 PM
> To: linux-s...@vge
> -Original Message-
> From: Laurence Oberman [mailto:lober...@redhat.com]
> Sent: Monday, July 2, 2018 5:11 PM
> To: Ming Lei; Jens Axboe
> Cc: linux-block@vger.kernel.org; Kashyap Desai; Omar Sandoval; Christoph
> Hellwig; Bart Van Assche; Hannes Reinecke
> Subje
Hi Ming,
I was running some performance test on latest 4.17-rc and figure out
performance drop (approximate 15% drop) due to below patch set.
https://marc.info/?l=linux-block=150802309522847=2
I observed drop on latest 4.16.6 stable and 4.17-rc kernel as well. Taking
bisect approach, figure out
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Wednesday, May 2, 2018 3:17 PM
> To: Kashyap Desai
> Cc: linux-s...@vger.kernel.org; linux-block@vger.kernel.org
> Subject: Re: Performance drop due to "blk-mq-sched: improve sequential
I/O
&g
> > I have created internal code changes based on below RFC and using irq
> > poll CPU lockup issue is resolved.
> > https://www.spinics.net/lists/linux-scsi/msg116668.html
>
> Could we use the 1:1 mapping and not apply out-of-tree irq poll in the
> following test? So that we can keep at same page
gt; Petersen;
> James Bottomley; Christoph Hellwig; Don Brace; Kashyap Desai; Peter
> Rivera;
> Paolo Bonzini; Laurence Oberman
> Subject: Re: [PATCH 0/5] blk-mq/scsi-mq: support global tags & introduce
> force_blk_mq
>
> On 02/03/2018 05:21 AM, Ming Lei wrote:
> >
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Thursday, February 8, 2018 10:23 PM
> To: Hannes Reinecke
> Cc: Kashyap Desai; Jens Axboe; linux-block@vger.kernel.org; Christoph
> Hellwig; Mike Snitzer; linux-s...@vger.kernel.org; Arun E
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Tuesday, February 6, 2018 1:35 PM
> To: Kashyap Desai
> Cc: Hannes Reinecke; Jens Axboe; linux-block@vger.kernel.org; Christoph
> Hellwig; Mike Snitzer; linux-s...@vger.kernel.org; Arun Easi; Omar
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Sunday, February 11, 2018 11:01 AM
> To: Kashyap Desai
> Cc: Hannes Reinecke; Jens Axboe; linux-block@vger.kernel.org; Christoph
> Hellwig; Mike Snitzer; linux-s...@vger.kernel.org; Arun E
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Tuesday, February 13, 2018 6:11 AM
> To: Kashyap Desai
> Cc: Hannes Reinecke; Jens Axboe; linux-block@vger.kernel.org; Christoph
> Hellwig; Mike Snitzer; linux-s...@vger.kernel.org; Arun E
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Tuesday, February 6, 2018 6:02 PM
> To: Kashyap Desai
> Cc: Hannes Reinecke; Jens Axboe; linux-block@vger.kernel.org; Christoph
> Hellwig; Mike Snitzer; linux-s...@vger.kernel.org; Arun Easi; Omar
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Wednesday, February 7, 2018 5:53 PM
> To: Hannes Reinecke
> Cc: Kashyap Desai; Jens Axboe; linux-block@vger.kernel.org; Christoph
> Hellwig; Mike Snitzer; linux-s...@vger.kernel.org; Arun E
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Tuesday, July 10, 2018 6:34 AM
> To: Jens Axboe
> Cc: linux-block@vger.kernel.org; Ming Lei; Kashyap Desai; Laurence
Oberman;
> Omar Sandoval; Christoph Hellwig; Bart Van Assche; Hannes Reinecke
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Thursday, March 8, 2018 6:46 AM
> To: Kashyap Desai
> Cc: Jens Axboe; linux-block@vger.kernel.org; Christoph Hellwig; Mike
Snitzer;
> linux-s...@vger.kernel.org; Hannes Reinecke; Arun Easi; Omar Sa
> -Original Message-
> From: Laurence Oberman [mailto:lober...@redhat.com]
> Sent: Wednesday, February 28, 2018 9:52 PM
> To: Ming Lei; Kashyap Desai
> Cc: Jens Axboe; linux-block@vger.kernel.org; Christoph Hellwig; Mike
> Snitzer;
> linux-s...@vger.kernel.org; Hanne
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Tuesday, March 13, 2018 3:13 PM
> To: James Bottomley; Jens Axboe; Martin K . Petersen
> Cc: Christoph Hellwig; linux-s...@vger.kernel.org; linux-
> bl...@vger.kernel.org; Meelis Roos; Don Br
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Thursday, March 8, 2018 4:54 PM
> To: Kashyap Desai
> Cc: Jens Axboe; linux-block@vger.kernel.org; Christoph Hellwig; Mike
Snitzer;
> linux-s...@vger.kernel.org; Hannes Reinecke; Arun Easi; Omar Sa
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Friday, March 9, 2018 9:02 AM
> To: James Bottomley; Jens Axboe; Martin K . Petersen
> Cc: Christoph Hellwig; linux-s...@vger.kernel.org; linux-
> bl...@vger.kernel.org; Meelis Roos; Don Br
> >
> > Also one observation using V3 series patch. I am seeing below Affinity
> > mapping whereas I have only 72 logical CPUs. It means we are really
> > not going to use all reply queues.
> > e.a If I bind fio jobs on CPU 18-20, I am seeing only one reply queue
> > is used and that may lead to
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Friday, March 9, 2018 5:33 PM
> To: Kashyap Desai
> Cc: James Bottomley; Jens Axboe; Martin K . Petersen; Christoph Hellwig;
> linux-s...@vger.kernel.org; linux-block@vger.kernel.org; Meelis
> -Original Message-
> From: Ming Lei [mailto:ming@redhat.com]
> Sent: Wednesday, March 7, 2018 10:58 AM
> To: Kashyap Desai
> Cc: Jens Axboe; linux-block@vger.kernel.org; Christoph Hellwig; Mike
Snitzer;
> linux-s...@vger.kernel.org; Hannes Reinecke; Arun Easi; Omar
> -Original Message-
> From: Artem Bityutskiy [mailto:dedeki...@gmail.com]
> Sent: Monday, March 19, 2018 8:12 PM
> To: h...@lst.de; Thomas Gleixner
> Cc: linux-block@vger.kernel.org; snit...@redhat.com; h...@suse.de;
> mr...@linux.ee; linux-s...@vger.kernel.org; don.br...@microsemi.com;
>
Hi,
I am running FIO script on Linux 4.15. This is generic behavior even on
3.x kernels as well. I wanted to know if my observation is correct or not.
Here is FIO command -
numactl -C 0-2 fio single --bs=4k --iodepth=64 --rw=randread
--ioscheduler=none --group_report --numjobs=2
If driver is
ecke; Arun Easi; Omar Sandoval;
> Martin K . Petersen; James Bottomley; Christoph Hellwig; Kashyap Desai;
> Peter
> Rivera; Meelis Roos
> Subject: Re: [PATCH V3 1/8] scsi: hpsa: fix selection of reply queue
>
> On Fri, 2018-03-02 at 15:03 +, Don Brace wrote:
> > > -Or
gt; To: Jens Axboe; linux-block@vger.kernel.org; Christoph Hellwig; Mike
Snitzer
> Cc: linux-s...@vger.kernel.org; Hannes Reinecke; Arun Easi; Omar
Sandoval;
> Martin K . Petersen; James Bottomley; Christoph Hellwig; Don Brace;
Kashyap
> Desai; Peter Rivera; Laurence Oberman; Ming Lei
>
>
> I guess we need to clean list after list_splice_tail in the 1/1 patch as
> following
> @@ -1533,19 +1533,19 @@ void blk_mq_insert_requests(struct
> blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx,
> struct list_head *list)
>
> {
> ...
> +
> + spin_lock(>lock);
> +
> Right.
>
> Kashyap, could you test the following patch?
>
> diff --git a/block/blk-mq.c b/block/blk-mq.c
> index 2f20c9e3efda..7d972b1c3153 100644
> --- a/block/blk-mq.c
> +++ b/block/blk-mq.c
> @@ -1567,7 +1567,7 @@ void blk_mq_insert_requests(struct blk_mq_hw_ctx
> *hctx, struct blk_mq_ctx
ger.kernel.org; Ming Lei; Kashyap Desai; Laurence
Oberman;
> Omar Sandoval; Christoph Hellwig; Bart Van Assche; Hannes Reinecke
> Subject: [PATCH 0/3] blk-mq: improve IO perf in case of none io sched
>
> Hi,
>
> The 1st 2 patch improves ctx->lock uses, and it is observed that
uest at ff800010
IP: [] mpt3sas_scsih_scsi_lookup_get+0x6c/0xc0 [mpt3sas]
PGD aa4414067 PUD 0
Oops: [#1] SMP
Call Trace:
[] mpt3sas_get_st_from_smid+0x1f/0x60 [mpt3sas]
[] scsih_shutdown+0x55/0x100 [mpt3sas]
Cc:
Signed-off-by: Kashyap Desai
Signed-off-by: Sreekanth Reddy
---
block/blk-mq
> On Tue, Dec 04, 2018 at 03:30:11PM +0530, Kashyap Desai wrote:
> > Problem statement :
> > Whenever try to get outstanding request via scsi_host_find_tag,
> > block layer will return stale entries instead of actual outstanding
> > request. Kernel panic if stale entr
36 matches
Mail list logo
