[PATCH 0/3] vhost_user: configure memory slots

[Bathija, Pravin]

Dear Maxime, Bruce, David, Chenbo,

Could you please help review the code ? The goal is to merge the changes before September 18 when the merge window closes for SPDK v25.09.

Regards,
Pravin


Internal Use - Confidential
> -----Original Message-----
> From: Bathija, Pravin
> Sent: Tuesday, August 26, 2025 11:47 AM
> To: Maxime Coquelin <maxime.coquelin at redhat.com>; Bruce Richardson
> <bruce.richardson at intel.com>; David Marchand
> <david.marchand at redhat.com>; Chenbo Xia <chenbox at nvidia.com>
> Cc: dev at dpdk.org; pravin.m.bathija.dev at gmail.com; Thomas Monjalon
> <thomas at monjalon.net>
> Subject: RE: [PATCH 0/3] vhost_user: configure memory slots
>
> Answers inline.
>
> > -----Original Message-----
> > From: Maxime Coquelin <maxime.coquelin at redhat.com>
> > Sent: Monday, August 25, 2025 1:49 AM
> > To: Bathija, Pravin <Pravin.Bathija at dell.com>; Bruce Richardson
> > <bruce.richardson at intel.com>; David Marchand
> > <david.marchand at redhat.com>; Chenbo Xia <chenbox at nvidia.com>
> > Cc: dev at dpdk.org; pravin.m.bathija.dev at gmail.com; Thomas Monjalon
> > <thomas at monjalon.net>
> > Subject: Re: [PATCH 0/3] vhost_user: configure memory slots
> >
> >
> > [EXTERNAL EMAIL]
> >
> > Hi,
> >
> > Please try to fix your email client so that we can follow the replies inlined.
>
> Thank you for the input. I have made the necessary adjustments. Please let me
> know if there is anything missing.
>
> >
> > On 8/22/25 9:33 AM, Bathija, Pravin wrote:
> > > Dear Maxime, Bruce, David, Chenbo,
> > >
> > > I would like to follow up on the status of the patches and when we
> > > should
> > expect these to be merged into the mainline.
> > >
> > > Please let me know if I can help answer any questions you might have.
> > >
> > > Regards,
> > > Pravin
> > >
> > >
> > > Internal Use - Confidential
> > > -----Original Message-----
> > > From: Bathija, Pravin
> > > Sent: Thursday, August 21, 2025 7:48 PM
> > > To: Thomas Monjalon <thomas at monjalon.net>
> > > Cc: dev at dpdk.org; pravin.m.bathija.dev at gmail.com; Maxime Coquelin
> > > <maxime.coquelin at redhat.com>; Chenbo Xia <chenbox at nvidia.com>;
> David
> > > Marchand <david.marchand at redhat.com>; Bruce Richardson
> > > <bruce.richardson at intel.com>
> > > Subject: RE: [PATCH 0/3] vhost_user: configure memory slots
> > >
> > > Comments inline:
> > >
> > > -----Original Message-----
> > > From: Thomas Monjalon <thomas at monjalon.net>
> > > Sent: Tuesday, August 19, 2025 4:36 AM
> > > To: Bathija, Pravin <Pravin.Bathija at dell.com>
> > > Cc: dev at dpdk.org; pravin.m.bathija.dev at gmail.com; Maxime Coquelin
> > > <maxime.coquelin at redhat.com>; Chenbo Xia <chenbox at nvidia.com>;
> David
> > > Marchand <david.marchand at redhat.com>; Bruce Richardson
> > > <bruce.richardson at intel.com>
> > > Subject: Re: [PATCH 0/3] vhost_user: configure memory slots
> > >
> > >
> > > [EXTERNAL EMAIL]
> > >
> > > Comments inline
> > >
> > > 12/08/2025 04:33, Pravin M Bathija:
> > >> - add protocol feature support add and removal of memory
> > >> regions/slots dynamically.
> > >> - this patch set has been tested with multiple instances of fio
> > >
> > > What is "fio"?
> > > Fio is an open-source tool to test I/O workloads on disks and file systems.
> > >
> > >> connected via libblkio to spdk target backed unix domain socket.
> > >> - please apply this this patch-set to dpdk mainline as well as
> > >> version 25.03.0.
> > >
> > > As mentionned previously, we don't plan to maintain 25.03.
> > > I understand you need it for SPDK,
> > > but I think SPDK should rely only on LTS branches.
> > > Is there a specific reason why 25.03 is required in SPDK?
> > >
> > > When we do sub-module init on spdk master, it uses dpdk version
> > > 25.03 from
> > it's own sub-repo.
> > > Our changes for vhost have already been pushed to spdk master. We
> > > have also pushed the same dpdk changes in the spdk sub-repo "dpdk"
> > > which is version 25.03. I was just ensuring that there is uniformity
> > > in the 25.03
> > codebase, whether it is on the spdk sub-repo or 25.03 within dpdk repo.
> >
> > Ok, still, it would be better for SPDK to uses LTS as we have no plans
> > to add extra stable branches.
> >
> > Also, your series may be considered as a feature and not a bug fix, so
> > even if
> > 25.03 would be a stable branch (which it is not), it would not be
> > backported against it.
>
> Understood. I would request that we merge my changes into DPDK mainline
> before September 18 when the merge window closes for SPDK v25.09.
>
> >
> > >
> > >
> > >> v2:
> > >> - fixed warnings with e-mail address
> > >> - fixed warnings with typos
> > >> - there is a warning about __rte_packed_begin not being in pair
> > >> with __rte_packed_end which on reading the code turns out to be
> > >> false. It is an anomaly of how git-format generates the patch and
> > >> how check-patch checks it.
> > >
> > > When sending a v2, please use -v2 so it is reflected in the email subject.
> > > I will remember this for next time. Thank you for pointing that out.
> > >
> > >> Pravin M Bathija (3):
> > >>    mailmap: add user
> > >>    vhost_user: configure memory slots
> > >>    vhost_user: support for memory regions
> > >>
> > >>   .mailmap               |   1 +
> > >>   lib/vhost/rte_vhost.h  |   4 +
> > >>   lib/vhost/vhost_user.c | 325
> > >> +++++++++++++++++++++++++++++++++++------
> > >>   lib/vhost/vhost_user.h |  10 ++
> > >>   4 files changed, 296 insertions(+), 44 deletions(-)
> > >
> > >
> > >