From: Sarthak Kukreti
Hi,
This patch series is an RFC of a mechanism to pass through provision requests
on stacked thinly provisioned storage devices/filesystems.
The linux kernel provides several mechanisms to set up thinly provisioned block
storage abstractions (eg. dm-thin, loop devices ov
On Thu, Sep 15, 2022 at 09:48:18AM -0700, Sarthak Kukreti wrote:
> From: Sarthak Kukreti
>
> Hi,
>
> This patch series is an RFC of a mechanism to pass through provision requests
> on stacked thinly provisioned storage devices/filesystems.
>
> The linux kernel provides several mechanisms to se
On 9/16/22 11:48, Sarthak Kukreti wrote:
Yes. On ChromiumOS, we regularly deal with storage devices that don't
support WRITE_ZEROES or that need to have it disabled, via a quirk,
due to a bug in the vendor's implementation. Using WRITE_ZEROES for
allocation makes the allocation path quite slow fo
On Thu, Sep 15, 2022 at 09:48:18AM -0700, Sarthak Kukreti wrote:
> From: Sarthak Kukreti
>
> Hi,
>
> This patch series is an RFC of a mechanism to pass through provision
> requests on stacked thinly provisioned storage devices/filesystems.
[Reflowed text]
> The linux kernel provides several me
On Thu, Sep 15, 2022 at 11:10 PM Stefan Hajnoczi wrote:
>
> On Thu, Sep 15, 2022 at 09:48:18AM -0700, Sarthak Kukreti wrote:
> > From: Sarthak Kukreti
> >
> > Hi,
> >
> > This patch series is an RFC of a mechanism to pass through provision
> > requests on stacked thinly provisioned storage devic
On Fri, Sep 16, 2022 at 1:01 PM Bart Van Assche wrote:
>
> On 9/16/22 11:48, Sarthak Kukreti wrote:
> > Yes. On ChromiumOS, we regularly deal with storage devices that don't
> > support WRITE_ZEROES or that need to have it disabled, via a quirk,
> > due to a bug in the vendor's implementation. Usi
On Fri, Sep 16, 2022 at 8:03 PM Darrick J. Wong wrote:
>
> On Thu, Sep 15, 2022 at 09:48:18AM -0700, Sarthak Kukreti wrote:
> > From: Sarthak Kukreti
> >
> > Hi,
> >
> > This patch series is an RFC of a mechanism to pass through provision
> > requests on stacked thinly provisioned storage devices
On Sat, Sep 17, 2022 at 12:46:33PM -0700, Sarthak Kukreti wrote:
> On Fri, Sep 16, 2022 at 8:03 PM Darrick J. Wong wrote:
> >
> > On Thu, Sep 15, 2022 at 09:48:18AM -0700, Sarthak Kukreti wrote:
> > > From: Sarthak Kukreti
> > >
> > > Hi,
> > >
> > > This patch series is an RFC of a mechanism to
On Fri, Sep 16, 2022 at 11:48:34AM -0700, Sarthak Kukreti wrote:
> Yes. On ChromiumOS, we regularly deal with storage devices that don't
> support WRITE_ZEROES or that need to have it disabled, via a quirk,
> due to a bug in the vendor's implementation.
So bloody punich the vendors for it. Unlike
On Tue, Sep 20, 2022 at 08:17:10PM +1000, Daniil Lunev wrote:
> to WRITE ZERO command in NVMe, but to WRITE UNAVAILABLE in
There is no such thing as WRITE UNAVAILABLE in NVMe.
> NVME 2.0 spec, and to UNMAP ANCHORED in SCSI spec.
The SCSI anchored LBA state is quite complicated, and in addition
t
> There is no such thing as WRITE UNAVAILABLE in NVMe.
Apologize, that is WRITE UNCORRECTABLE. Chapter 3.2.7 of
NVM Express NVM Command Set Specification 1.0b
> That being siad you still haven't actually explained what problem
> you're even trying to solve.
The specific problem is the following:
> So bloody punich the vendors for it. Unlike most of the Linux community
> your actually have purchasing power and you'd help everyone by making
> use of that instead adding hacks to upstream.
Hi Cristoph,
I just want to note that the primitive this patchset introduces would not
map
to WRITE ZER
On Tue, Sep 20 2022 at 5:48P -0400,
Daniil Lunev wrote:
> > There is no such thing as WRITE UNAVAILABLE in NVMe.
> Apologize, that is WRITE UNCORRECTABLE. Chapter 3.2.7 of
> NVM Express NVM Command Set Specification 1.0b
>
> > That being siad you still haven't actually explained what problem
>
On Wed, Sep 21, 2022 at 07:48:50AM +1000, Daniil Lunev wrote:
> > There is no such thing as WRITE UNAVAILABLE in NVMe.
> Apologize, that is WRITE UNCORRECTABLE. Chapter 3.2.7 of
> NVM Express NVM Command Set Specification 1.0b
Write uncorrectable is a very different thing, and the equivalent of th
On Fri, Sep 23 2022 at 4:51P -0400,
Christoph Hellwig wrote:
> On Wed, Sep 21, 2022 at 07:48:50AM +1000, Daniil Lunev wrote:
> > > There is no such thing as WRITE UNAVAILABLE in NVMe.
> > Apologize, that is WRITE UNCORRECTABLE. Chapter 3.2.7 of
> > NVM Express NVM Command Set Specification 1.0b
On Fri, Sep 23, 2022 at 7:08 AM Mike Snitzer wrote:
>
> On Fri, Sep 23 2022 at 4:51P -0400,
> Christoph Hellwig wrote:
>
> > On Wed, Sep 21, 2022 at 07:48:50AM +1000, Daniil Lunev wrote:
> > > > There is no such thing as WRITE UNAVAILABLE in NVMe.
> > > Apologize, that is WRITE UNCORRECTABLE. Ch
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