On Fri, 2020-10-09 at 14:34 -0700, Eric Biggers wrote:
> On Fri, Oct 09, 2020 at 12:49:57PM -0700, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > The kmap() calls in this FS are localized to a single thread. To
> > avoid the over head of global PKRS updates use the new
> > kmap_thread()
On Sun, 2020-10-18 at 19:59 +0100, Matthew Wilcox wrote:
> On Sat, Oct 17, 2020 at 09:09:28AM -0700, t...@redhat.com wrote:
> > clang has a number of useful, new warnings see
> > https://urldefense.com/v3/__https://clang.llvm.org/docs/DiagnosticsReference.html__;!!GqivPVa7Brio!Krxz78O3RKcB9JBMVo_F9
On Sun, 2020-10-18 at 20:16 +0100, Matthew Wilcox wrote:
> On Sun, Oct 18, 2020 at 12:13:35PM -0700, James Bottomley wrote:
> > On Sun, 2020-10-18 at 19:59 +0100, Matthew Wilcox wrote:
> > > On Sat, Oct 17, 2020 at 09:09:28AM -0700, t...@redhat.com wrote:
> > > > cla
On Sun, 2020-11-22 at 08:17 -0800, Kees Cook wrote:
> On Fri, Nov 20, 2020 at 11:51:42AM -0800, Jakub Kicinski wrote:
> > On Fri, 20 Nov 2020 11:30:40 -0800 Kees Cook wrote:
> > > On Fri, Nov 20, 2020 at 10:53:44AM -0800, Jakub Kicinski wrote:
> > > > On Fri, 20 Nov 2020 12:21:39 -0600 Gustavo A. R
On Sun, 2020-11-22 at 10:25 -0800, Joe Perches wrote:
> On Sun, 2020-11-22 at 10:21 -0800, James Bottomley wrote:
> > Please tell me our reward for all this effort isn't a single
> > missing error print.
>
> There were quite literally dozens of logical defects found
>
On Sun, 2020-11-22 at 11:22 -0800, Joe Perches wrote:
> On Sun, 2020-11-22 at 11:12 -0800, James Bottomley wrote:
> > On Sun, 2020-11-22 at 10:25 -0800, Joe Perches wrote:
> > > On Sun, 2020-11-22 at 10:21 -0800, James Bottomley wrote:
> > > > Please tell me our rewa
On Sun, 2020-11-22 at 21:35 +0100, Miguel Ojeda wrote:
> On Sun, Nov 22, 2020 at 7:22 PM James Bottomley
> wrote:
> > Well, it's a problem in an error leg, sure, but it's not a really
> > compelling reason for a 141 patch series, is it? All that fixing
> > this
On Mon, 2020-11-23 at 15:19 +0100, Miguel Ojeda wrote:
> On Sun, Nov 22, 2020 at 11:36 PM James Bottomley
> wrote:
> > Well, it seems to be three years of someone's time plus the
> > maintainer review time and series disruption of nearly a thousand
> > patches. Let
On Mon, 2020-11-23 at 19:56 +0100, Miguel Ojeda wrote:
> On Mon, Nov 23, 2020 at 4:58 PM James Bottomley
> wrote:
> > Well, I used git. It says that as of today in Linus' tree we have
> > 889 patches related to fall throughs and the first series went in
> > in octob
On Thu, 2019-06-13 at 12:16 +0200, Greg Kroah-Hartman wrote:
> On Thu, Jun 13, 2019 at 06:04:11PM +0800, Ming Lei wrote:
> > On Thu, Jun 13, 2019 at 11:52:14AM +0200, Greg Kroah-Hartman wrote:
> > > On Thu, Jun 13, 2019 at 03:13:28PM +0800, Ming Lei wrote:
> > > > The current way isn't safe for cha
On Tue, 2019-07-09 at 08:48 -0700, Matthew Wilcox wrote:
> On Tue, Jul 09, 2019 at 11:30:39AM -0400, Theodore Ts'o wrote:
> > On Tue, Jul 09, 2019 at 04:21:36AM -0700, Matthew Wilcox wrote:
> > > How does
> > > https://www.zdnet.com/article/microsoft-open-sources-its-entire-p
> > > atent-portfolio/
On Tue, 2019-07-09 at 12:37 -0400, Sasha Levin wrote:
> On Tue, Jul 09, 2019 at 08:48:34AM -0700, Matthew Wilcox wrote:
> > On Tue, Jul 09, 2019 at 11:30:39AM -0400, Theodore Ts'o wrote:
> > > On Tue, Jul 09, 2019 at 04:21:36AM -0700, Matthew Wilcox wrote:
> > > > How does
> > > > https://www.zdnet
On Tue, 2017-03-14 at 12:29 +, Reshetova, Elena wrote:
> > Elena Reshetova writes:
> >
> > > refcount_t type and corresponding API should be
> > > used instead of atomic_t when the variable is used as
> > > a reference counter. This allows to avoid accidental
> > > refcounter overflows that m
On Fri, 2015-03-27 at 00:26 -0700, K. Y. Srinivasan wrote:
> This patch-set addresses perf issues discovered on the Azure storage stack.
> These patches also fix a couple of bugs.
>
> As in the first version of this patch-set, some of the patches are simply a
> resend.
> I have bumped up the vers
On Fri, 2015-12-18 at 16:20 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: Hannes Reinecke [mailto:h...@suse.de]
> > Sent: Friday, December 18, 2015 12:52 AM
> > To: KY Srinivasan ; gre...@linuxfoundation.org;
> > linux-
> > ker...@vger.kernel.org; de...@linuxdriverproject.
On Fri, 2015-12-18 at 09:49 +0100, Hannes Reinecke wrote:
> What I would like to see is a clear separation here:
> - Disable FC disk handling if FC attributes are not configured
> - Add a module parameter allowing to disable FC attributes even if
> they are compiled in. Remember: this is a virtual
On Sat, 2015-12-19 at 02:28 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: James Bottomley [mailto:james.bottom...@hansenpartnership.com
> > ]
> > Sent: Friday, December 18, 2015 8:48 AM
> > To: KY Srinivasan ; Hannes Rein
On Thu, 2016-01-07 at 16:40 -0800, K. Y. Srinivasan wrote:
> The macro startget_to_rport() can return NULL; handle that case
> properly.
OK, can we unwind why you think you could possibly need this? It would
mean that fc_timed_out was called for a non-FC device, which was
thought to be an impossi
On Fri, 2016-01-08 at 18:58 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: James Bottomley [mailto:james.bottom...@hansenpartnership.com
> > ]
> > Sent: Thursday, January 7, 2016 3:49 PM
> > To: KY Srinivasan ; gre...@linuxf
On Fri, 2016-01-08 at 20:12 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: James Bottomley [mailto:james.bottom...@hansenpartnership.com
> > ]
> > Sent: Friday, January 8, 2016 11:21 AM
> > To: KY Srinivasan ; gre...@linuxf
OK, like this?
>From 7af7c428e7e04ddcc87fda12d6571e3dff8ae024 Mon Sep 17 00:00:00 2001
From: James Bottomley
Date: Fri, 18 Mar 2016 15:35:45 -0700
Subject: scsi_transport_fc: introduce lightweight class for virtualization
systems
The FC transport class is very heavily tilted towards helpin
Signed-off-by: James Bottomley
---
drivers/scsi/storvsc_drv.c | 11 +++
1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 3ddcabb..dcb7393 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
On Wed, 2016-03-16 at 23:15 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: James Bottomley [mailto:james.bottom...@hansenpartnership.com
> > ]
> > Sent: Wednesday, March 16, 2016 4:08 PM
> > To: Martin K. Petersen ; KY Srinivasan
> >
On Wed, 2016-03-16 at 18:34 -0400, Martin K. Petersen wrote:
> > > > > > "KY" == KY Srinivasan writes:
>
> KY> How would I get the sysfs files under fc_host if I don't use the
> FC
> KY> transport. The customer scripts expect these sysfs files.
>
> Right, but I was interested in finding out why
On Wed, 2016-01-27 at 23:29 -0800, K. Y. Srinivasan wrote:
> tree: https://na01.safelinks.protection.outlook.com/?url=https%3a%2
> f%2fgit.kernel.org%2fpub%2fscm%2flinux%2fkernel%2fgit%2ftorvalds%2fli
> nux.git&data=01%7c01%7ckys%40microsoft.com%7ce2e0622715844b79ad7108d3
> 2796ec3c%7c72f988bf86f
On Thu, 2016-01-28 at 19:07 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: Olaf Hering [mailto:o...@aepfle.de]
> > Sent: Thursday, January 28, 2016 7:56 AM
> > To: KY Srinivasan
> > Cc: gre...@linuxfoundation.org; linux-ker...@vger.kernel.org;
> > de...@linuxdriverproject.
erence to
> > > `fc_release_transport'
>
> With this commit, the storvsc driver depends on FC atttributes. Make
> this
> dependency explicit.
>
> Signed-off-by: K. Y. Srinivasan
> Reported-by: Fengguang Wu
> ---
> V2: Fixed the dependency based on
On Fri, 2016-02-26 at 15:45 -0800, K. Y. Srinivasan wrote:
> tree: https://na01.safelinks.protection.outlook.com/?url=https%3a%2
> f%2fgit.kernel.org%2fpub%2fscm%2flinux%2fkernel%2fgit%2ftorvalds%2fli
> nux.git&data=01%7c01%7ckys%40microsoft.com%7ce2e0622715844b79ad7108d3
> 2796ec3c%7c72f988bf86f
On Fri, 2016-02-26 at 23:22 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: James Bottomley [mailto:james.bottom...@hansenpartnership.com
> > ]
> > Sent: Friday, February 26, 2016 2:25 PM
> > To: KY Srinivasan ; linux-ke
On Thu, 2016-06-09 at 18:25 +0200, Olaf Hering wrote:
> Reducing the sg_tablesize allows booting of 32bit kernels in VMs,
> after
> commit be0cf6ca301c61458dc4aa1a37acf4f58d2ed3d6 ("scsi: storvsc: Set
> the
> tablesize based on the information given by the host")
>
> [5.567138] hv_storvsc vmbu
On Wed, 2013-10-02 at 18:29 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: geert.uytterhoe...@gmail.com [mailto:geert.uytterhoe...@gmail.com]
> > On Behalf Of Geert Uytterhoeven
> > Sent: Wednesday, September 25, 2013 1:40 AM
> > To: KY Srinivasan
> > Cc: Mike Christie; Jac
On Fri, 2013-10-04 at 15:02 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: Eric Seppanen [mailto:e...@purestorage.com]
> > Sent: Thursday, October 03, 2013 1:49 PM
> > To: Nicholas A. Bellinger
> > Cc: KY Srinivasan; linux-ker...@vger.kernel.org;
> > de...@linuxdriverproje
On Fri, 2013-10-04 at 12:38 -0700, K. Y. Srinivasan wrote:
> Rather than having a separate constant for specifying the timeout on FLUSH
> operations, use the basic I/O timeout value that is already configurable
> on a per target basis to derive the FLUSH timeout. Looking at the current
> definition
On Fri, 2013-10-04 at 22:01 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: James Bottomley [mailto:jbottom...@parallels.com]
> > Sent: Friday, October 04, 2013 2:42 PM
> > To: KY Srinivasan
> > Cc: gre...@linuxfoundation.org; lin
On Fri, 2014-05-16 at 16:39 +0100, Ian Abbott wrote:
> From: Andy Whitcroft
>
> Suggested-by: James Bottomley
That is my patch, isn't it, just with a slightly modified comment:
http://marc.info/?l=linux-scsi&m=137908428211951
Andy promised to go off and test it and that&
On Fri, 2014-05-16 at 16:39 +0100, Ian Abbott wrote:
> From: Andy Whitcroft
>
> BugLink: http://bugs.launchpad.net/bugs/1234417
This is a pretty low quality bug report; where's the analysis that
should be in your patch?
The problem is, is it not, that when you turn on trim we now also probe
for
On Fri, 2014-05-16 at 18:39 +0100, Ian Abbott wrote:
> On 2014-05-16 18:14, James Bottomley wrote:
> > On Fri, 2014-05-16 at 16:39 +0100, Ian Abbott wrote:
> >> From: Andy Whitcroft
> >>
> >> Suggested-by: James Bottomley
> >
> > That is my patch,
On Fri, 2014-05-16 at 19:18 +0100, Ian Abbott wrote:
> On 2014-05-16 18:58, James Bottomley wrote:
> > On Fri, 2014-05-16 at 18:39 +0100, Ian Abbott wrote:
> >> On 2014-05-16 18:14, James Bottomley wrote:
> >>> On Fri, 2014-05-16 at 16:39 +0100, Ian Abbott wrot
On Thu, 2014-05-22 at 10:49 +, KY Srinivasan wrote:
>
>
> > -Original Message-
> > From: Andy Whitcroft [mailto:a...@canonical.com]
> > Sent: Wednesday, May 21, 2014 7:25 AM
> > To: Ian Abbott
> > Cc: linux-s...@vger.kernel.org; de...@linuxdriverproject.org; KY Srinivasan;
> > Haiyang
On Wed, 2014-06-04 at 09:33 -0700, K. Y. Srinivasan wrote:
> Commit ID: 7e660100d85af860e7ad763202fff717adcdaacd added code to derive the
> FLUSH_TIMEOUT from the basic I/O timeout. However, this patch did not use the
> basic I/O timeout of the device. Fix this bug.
>
> Signed-off-by: K. Y. Sriniv
On Fri, 2014-06-06 at 12:18 -0500, Mike Christie wrote:
> On 6/5/14, 9:53 PM, KY Srinivasan wrote:
> >
> >
> >> -Original Message-
> >> From: Mike Christie [mailto:micha...@cs.wisc.edu]
> >> Sent: Thursday, June 5, 2014 6:33 PM
> >> To
On Fri, 2014-08-29 at 10:13 +0200, Hannes Reinecke wrote:
> On 08/29/2014 09:39 AM, Bart Van Assche wrote:
> > On 08/29/14 08:19, Hannes Reinecke wrote:
> >> On 08/29/2014 04:42 AM, Mike Christie wrote:
> >>> How are distros handling 0x6/0x3f/0x0e (report luns changed) when it
> >>> gets passed to
On Sat, 2014-10-11 at 10:39 -0700, Christoph Hellwig wrote:
> On Fri, Oct 10, 2014 at 08:49:01AM +0100, Sitsofe Wheeler wrote:
> > Microsoft Hyper-V virtual disks currently only claim SPC-2 compliance
> > even though they implement post SPC-2 features (such as thin
> > provisioning) which means the
On Thu, 2015-08-13 at 17:07 -0700, K. Y. Srinivasan wrote:
> From: Dexuan Cui
>
> This fixes the recent commit 3b71107d73b16074afa7658f3f0fcf837aabfe24:
Which tree is this in? upstream linus is giving me bad object on that
id.
> Drivers: hv: vmbus: Further improve CPU affiliation logic
>
> W
On Thu, 2015-08-13 at 08:43 -0700, K. Y. Srinivasan wrote:
> From: Keith Mange
>
> Currently we are making decisions based on vmbus protocol versions
> that have been negotiated; use storage potocol versions instead.
>
> Tested-by: Alex Ng
> Signed-off-by: Keith Mange
> Signed-off-by: K. Y. Sr
On Mon, 2015-08-31 at 08:21 -0700, K. Y. Srinivasan wrote:
> Don't set the SRB_FLAGS_QUEUE_ACTION_ENABLE flag since we are not specifying
> tags.
What's the actual problem description this causes?
James
> Signed-off-by: K. Y. Srinivasan
> Cc: sta...@vger.kernel.org
> ---
> drivers/scsi/storvs
On Wed, 2014-07-09 at 19:52 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: Christoph Hellwig [mailto:h...@infradead.org]
> > Sent: Wednesday, July 9, 2014 1:43 AM
> > To: KY Srinivasan
> > Cc: linux-ker...@vger.kernel.org; de...@linuxdriverproject.org;
> > oher...@suse.com;
On Wed, 2014-07-09 at 21:14 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: James Bottomley [mailto:jbottom...@parallels.com]
> > Sent: Wednesday, July 9, 2014 12:57 PM
> > To: KY Srinivasan
> > Cc: linux-ker...@vger.kerne
On Thu, 2014-07-10 at 21:02 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: James Bottomley [mailto:jbottom...@parallels.com]
> > Sent: Wednesday, July 9, 2014 3:27 PM
> > To: KY Srinivasan
> > Cc: linux-ker...@vger.kernel.org; m...@mk
On Wed, 2014-07-16 at 04:01 -0700, h...@infradead.org wrote:
> On Sun, Jul 13, 2014 at 08:58:34AM -0400, Martin K. Petersen wrote:
> > > "KY" == KY Srinivasan writes:
> >
> > KY> Windows hosts do support UNMAP and set the field in the
> > KY> EVPD. However, since the host advertises SPC-2 com
On Wed, 2014-07-16 at 13:47 -0400, Martin K. Petersen wrote:
> > "Christoph" == hch@infradead org writes:
>
> Christoph> Oh, we actually have devices that support WRITE SAME with
> Christoph> unmap, but not without? That's defintively a little strange.
>
> Yep :(
>
> There were several SSD
On Wed, 2014-07-16 at 14:45 -0400, Martin K. Petersen wrote:
> >>>>> "James" == James Bottomley writes:
>
> >> I don't have a problem with a BLIST_PREFER_UNMAP flag or something
> >> like that. But BLIST_TRY_VPD_PAGES seems more generally u
On Wed, 2014-07-16 at 15:08 -0400, Martin K. Petersen wrote:
> >>>>> "James" == James Bottomley writes:
>
> James> It's the code we identified in sd.c:read_capacity_16():
>
> That's there to support devices that implement thin provisioning b
On Fri, 2014-07-18 at 00:51 +, Elliott, Robert (Server Storage)
wrote:
> In sd_sync_cache:
> rq->timeout *= SD_FLUSH_TIMEOUT_MULTIPLIER;
>
> Regardless of the baseline for the multiplication, a magic
> number of 2 is too arbitrary. That might work for an
> individual drive, but could b
On Fri, 2014-07-18 at 17:26 +0200, Benoit Taine wrote:
> We should prefer `const struct pci_device_id` over
> `DEFINE_PCI_DEVICE_TABLE` to meet kernel coding style guidelines.
> This issue was reported by checkpatch.
What kernel coding style? checkpatch isn't the arbiter of style, if
that's the o
On Fri, 2014-07-18 at 09:43 -0700, Greg KH wrote:
> On Fri, Jul 18, 2014 at 12:22:13PM -0400, John W. Linville wrote:
> > On Fri, Jul 18, 2014 at 05:26:47PM +0200, Benoit Taine wrote:
> > > We should prefer `const struct pci_device_id` over
> > > `DEFINE_PCI_DEVICE_TABLE` to meet kernel coding styl
On Fri, 2014-07-18 at 16:44 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: Christoph Hellwig (h...@infradead.org) [mailto:h...@infradead.org]
> > Sent: Friday, July 18, 2014 8:11 AM
> > To: KY Srinivasan
> > Cc: Jens Axboe; James Bottomley
I can get another review).
>
> James, does this look fine to you?
Yes:
Reviewed-by: James Bottomley
James
___
devel mailing list
de...@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
On Fri, 2014-07-18 at 17:17 +, Elliott, Robert (Server Storage)
wrote:
>
>
> > From: James Bottomley [mailto:jbottom...@parallels.com]
> >
> > On Fri, 2014-07-18 at 00:51 +, Elliott, Robert (Server Storage)
> > wrote:
> ...
> > >
> > >
On Fri, 2014-07-18 at 11:17 -0700, Greg KH wrote:
> On Fri, Jul 18, 2014 at 09:54:32AM -0700, James Bottomley wrote:
> > On Fri, 2014-07-18 at 09:43 -0700, Greg KH wrote:
> > > On Fri, Jul 18, 2014 at 12:22:13PM -0400, John W. Linville wrote:
> > > > On Fri, Ju
On Thu, 2014-07-24 at 08:56 +0100, Sitsofe Wheeler wrote:
> Microsoft Hyper-V targets currently only claim SPC-2 compliance / no
> compliance indicated even though they implement post SPC-2 features
> which means those features are not tested for. Add a blacklist flag to
> Hyper-V devices that forc
On Fri, 2014-07-25 at 16:47 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: Martin K. Petersen [mailto:martin.peter...@oracle.com]
> > Sent: Thursday, July 24, 2014 8:54 AM
> > To: Sitsofe Wheeler
> > Cc: Martin K. Petersen; Christoph Hellwig; KY Srinivasan;
> > gre...@linux
On Mon, 2014-07-28 at 19:05 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: Martin K. Petersen [mailto:martin.peter...@oracle.com]
> > Sent: Monday, July 28, 2014 12:03 PM
> > To: KY Srinivasan
> > Cc: Martin K. Petersen; Sitsofe Wheeler; Christoph Hellwig;
> > gre...@linuxf
On Mon, 2020-08-17 at 13:02 -0700, Jens Axboe wrote:
> On 8/17/20 12:48 PM, Kees Cook wrote:
> > On Mon, Aug 17, 2020 at 12:44:34PM -0700, Jens Axboe wrote:
> > > On 8/17/20 12:29 PM, Kees Cook wrote:
> > > > On Mon, Aug 17, 2020 at 06:56:47AM -0700, Jens Axboe wrote:
> > > > > On 8/17/20 2:15 AM,
On Tue, 2020-08-18 at 13:10 -0700, Kees Cook wrote:
> On Tue, Aug 18, 2020 at 01:00:33PM -0700, James Bottomley wrote:
> > On Mon, 2020-08-17 at 13:02 -0700, Jens Axboe wrote:
> > > On 8/17/20 12:48 PM, Kees Cook wrote:
> > > > On Mon, Aug 17, 2020 at 12:4
On Wed, 2020-08-19 at 07:00 -0600, Jens Axboe wrote:
> On 8/18/20 1:00 PM, James Bottomley wrote:
[...]
> > Since both threads seem to have petered out, let me suggest in
> > kernel.h:
> >
> > #define cast_out(ptr, container, member) \
> > container_o
On Wed, 2020-08-19 at 21:54 +0530, Allen wrote:
> > [...]
> > > > Since both threads seem to have petered out, let me suggest in
> > > > kernel.h:
> > > >
> > > > #define cast_out(ptr, container, member) \
> > > > container_of(ptr, typeof(*container), member)
> > > >
> > > > It does what you
On Tue, 2013-06-04 at 12:05 -0700, K. Y. Srinivasan wrote:
> Implement multi-channel support for the storage devices.
This doesn't compile:
CC [M] drivers/scsi/storvsc_drv.o
drivers/scsi/storvsc_drv.c: In function ‘handle_sc_creation’:
drivers/scsi/storvsc_drv.c:763:35: error: ‘struct vmbus_ch
On Wed, 2013-06-26 at 12:58 +, KY Srinivasan wrote:
>
> > -Original Message-
> > From: KY Srinivasan
> > Sent: Monday, June 17, 2013 9:32 AM
> > To: gre...@linuxfoundation.org; linux-ker...@vger.kernel.org;
> > de...@linuxdriverproject.org; oher...@suse.com; jbottom...@parallels.com;
>
On Fri, 2013-09-13 at 13:58 +0100, Andy Whitcroft wrote:
> tl;dr -- enable TRIM support for Hyper-V emulated disks.
>
> The Hyper-V hypervisor can support TRIM for its devices, advertising this
> via the appropriate VPD pages. However the emulated disks only claim
> to be SPC-2 devices. Accordin
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