* v6.1-rc1, remap_file_pages() and vma linked list?
@ 2022-10-25 7:09 J. R. Okajima
2022-10-25 15:57 ` Liam Howlett
0 siblings, 1 reply; 2+ messages in thread
From: J. R. Okajima @ 2022-10-25 7:09 UTC (permalink / raw)
To: Liam.Howlett, yang.lee, yuzhao
Cc: catalin.marinas, david, dhowells, dave, willy, sj, svens, vbabka,
will, linux-kernel
Hello,
Linux-v4.10 has a commit
48f7df329474 2016-02-18 mm: fix regression in remap_file_pages() emulation
and it contains a small test program where remap_file_pages() will split
a region into two VMAs.
Linux-v6.1-rc1 remap_file_pages() doesn't pass that old test.
I tried investigation, but I am not good in this tech field. I could
only find there may be related to the commit
763ecb035029 2022-09-26 mm: remove the vma linked list
but I am not sure.
How can we make the old test pass?
"Don't use remap_file_pages()" or "Ignore such old test" is not an
option.
J. R. Okajima
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: v6.1-rc1, remap_file_pages() and vma linked list?
2022-10-25 7:09 v6.1-rc1, remap_file_pages() and vma linked list? J. R. Okajima
@ 2022-10-25 15:57 ` Liam Howlett
0 siblings, 0 replies; 2+ messages in thread
From: Liam Howlett @ 2022-10-25 15:57 UTC (permalink / raw)
To: J. R. Okajima
Cc: yang.lee@linux.alibaba.com, yuzhao@google.com,
catalin.marinas@arm.com, david@redhat.com, dhowells@redhat.com,
dave@stgolabs.net, willy@infradead.org, sj@kernel.org,
svens@linux.ibm.com, vbabka@suse.cz, will@kernel.org,
linux-kernel@vger.kernel.org
* J. R. Okajima <hooanon05g@gmail.com> [221025 03:09]:
> Hello,
>
> Linux-v4.10 has a commit
> 48f7df329474 2016-02-18 mm: fix regression in remap_file_pages() emulation
> and it contains a small test program where remap_file_pages() will split
> a region into two VMAs.
>
> Linux-v6.1-rc1 remap_file_pages() doesn't pass that old test.
I broke this in the commit you reference below.
> I tried investigation, but I am not good in this tech field. I could
> only find there may be related to the commit
> 763ecb035029 2022-09-26 mm: remove the vma linked list
> but I am not sure.
> How can we make the old test pass?
> "Don't use remap_file_pages()" or "Ignore such old test" is not an
> option.
Thanks for reporting this issue. I have a fix that will be sent out
shortly.
Regards,
Liam
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-10-25 7:09 v6.1-rc1, remap_file_pages() and vma linked list? J. R. Okajima
2022-10-25 15:57 ` Liam Howlett
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