From: Mike Rapoport <rppt@kernel.org>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Alexander Graf <graf@amazon.com>, Baoquan He <bhe@redhat.com>,
Changyuan Lyu <changyuanl@google.com>,
Chris Li <chrisl@kernel.org>,
Pasha Tatashin <pasha.tatashin@soleen.com>,
Pratyush Yadav <pratyush@kernel.org>,
kexec@lists.infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 1/2] kho: add support for preserving vmalloc allocations
Date: Mon, 15 Sep 2025 19:11:12 +0300 [thread overview]
Message-ID: <aMg6oK6gaUfU9ol2@kernel.org> (raw)
In-Reply-To: <20250915143730.GK1024672@nvidia.com>
On Mon, Sep 15, 2025 at 11:37:30AM -0300, Jason Gunthorpe wrote:
> On Mon, Sep 15, 2025 at 05:01:01PM +0300, Mike Rapoport wrote:
> > > kzalloc() cannot be preserved, the only thing we support today is
> > > alloc_page(), so this code pattern shouldn't exist.
> >
> > kzalloc(PAGE_SIZE) can be preserved, it's page aligned and we don't have to
> > restore it into a slab cache. But this maybe indeed confusing for those who
> > copy paste the code, so I'll change it.
>
> It really isn't. The kzalloc should be returning frozen pages for that
> allocation and the restoration will not put frozen pages back.
But we don't care here, we free that page immediately to buddy on
restoration.
> Jason
--
Sincerely yours,
Mike.
next prev parent reply other threads:[~2025-09-15 16:11 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-08 10:35 [PATCH v3 0/2] kho: add support for preserving vmalloc allocations Mike Rapoport
2025-09-08 10:35 ` [PATCH v3 1/2] " Mike Rapoport
2025-09-08 14:14 ` Jason Gunthorpe
2025-09-15 14:01 ` Mike Rapoport
2025-09-15 14:37 ` Jason Gunthorpe
2025-09-15 16:11 ` Mike Rapoport [this message]
2025-09-08 18:12 ` Pratyush Yadav
2025-09-08 18:18 ` Jason Gunthorpe
2025-09-09 14:33 ` Pratyush Yadav
2025-09-15 14:12 ` Mike Rapoport
2025-09-15 14:43 ` Jason Gunthorpe
2025-09-15 16:36 ` Mike Rapoport
2025-09-16 13:05 ` Jason Gunthorpe
2025-09-16 13:21 ` Pratyush Yadav
2025-09-16 14:34 ` Mike Rapoport
2025-09-16 12:48 ` Pratyush Yadav
2025-09-16 14:41 ` Mike Rapoport
2025-09-15 14:08 ` Mike Rapoport
2025-09-16 12:43 ` Pratyush Yadav
2025-09-08 10:35 ` [PATCH v3 2/2] lib/test_kho: use kho_preserve_vmalloc instead of storing addresses in fdt Mike Rapoport
-- strict thread matches above, loose matches on Subject: below --
2025-09-07 7:00 [PATCH v2 0/2] kho: add support for preserving vmalloc allocations Mike Rapoport
2025-09-07 7:00 ` [PATCH v3 1/2] " Mike Rapoport
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