From: Christoph Hellwig <hch@lst.de>
To: David Miller <davem@davemloft.net>
Cc: ldv@altlinux.org, hch@lst.de, khalid.aziz@oracle.com,
torvalds@linux-foundation.org, akpm@linux-foundation.org,
matorola@gmail.com, sparclinux@vger.kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 09/16] sparc64: use the generic get_user_pages_fast code
Date: Fri, 19 Jul 2019 08:00:53 +0200 [thread overview]
Message-ID: <20190719060053.GA18491@lst.de> (raw)
In-Reply-To: <20190718.141405.1070121094691581998.davem@davemloft.net>
On Thu, Jul 18, 2019 at 02:14:05PM -0700, David Miller wrote:
> From: "Dmitry V. Levin" <ldv@altlinux.org>
> Date: Thu, 18 Jul 2019 00:59:56 +0300
>
> > So this ended up as commit 7b9afb86b6328f10dc2cad9223d7def12d60e505
> > (thanks to Anatoly for bisecting) and introduced a regression:
> > futex.test from the strace test suite now causes an Oops on sparc64
> > in futex syscall.
> >
> > Here is a heavily stripped down reproducer:
>
> Does not reproduce for me on a T4-2 machine.
>
> So this problem might depend on the type of system you are on,
> I suspect it's one of those "pre-Niagara vs. Niagara and later"
> situations because that's the dividing line between two set of
> wildly different TLB and cache management methods.
>
> What kind of machine are you on?
FYI, I'm pretty sure I tested this on Guenthers build test qemu
setup in the end, which further speaks for the different machines
issue.
next prev parent reply other threads:[~2019-07-19 6:01 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-25 14:36 switch the remaining architectures to use generic GUP v4 Christoph Hellwig
2019-06-25 14:37 ` [PATCH 01/16] mm: use untagged_addr() for get_user_pages_fast addresses Christoph Hellwig
2019-06-25 14:37 ` [PATCH 02/16] mm: simplify gup_fast_permitted Christoph Hellwig
2019-06-25 14:37 ` [PATCH 03/16] mm: lift the x86_32 PAE version of gup_get_pte to common code Christoph Hellwig
2019-06-25 14:37 ` [PATCH 04/16] MIPS: use the generic get_user_pages_fast code Christoph Hellwig
2019-06-29 14:37 ` Guenter Roeck
2019-06-25 14:37 ` [PATCH 05/16] sh: add the missing pud_page definition Christoph Hellwig
2019-06-25 14:37 ` [PATCH 06/16] sh: use the generic get_user_pages_fast code Christoph Hellwig
2019-06-29 15:15 ` Guenter Roeck
2019-06-25 14:37 ` [PATCH 07/16] sparc64: add the missing pgd_page definition Christoph Hellwig
2019-06-25 14:37 ` [PATCH 08/16] sparc64: define untagged_addr() Christoph Hellwig
2019-06-25 14:37 ` [PATCH 09/16] sparc64: use the generic get_user_pages_fast code Christoph Hellwig
2019-07-17 21:59 ` Dmitry V. Levin
2019-07-17 22:04 ` Linus Torvalds
2019-07-17 23:30 ` Dmitry V. Levin
2019-07-18 0:17 ` Linus Torvalds
2019-07-18 1:21 ` David Miller
2019-07-18 21:43 ` David Miller
2019-07-18 21:14 ` David Miller
2019-07-19 6:00 ` Christoph Hellwig [this message]
2019-07-24 19:32 ` Anatoly Pugachev
2019-07-24 20:13 ` David Miller
2019-07-25 18:33 ` Anatoly Pugachev
2019-07-25 22:52 ` David Miller
2019-07-28 2:09 ` David Miller
2019-07-28 20:00 ` Anatoly Pugachev
2019-07-26 17:58 ` Khalid Aziz
2019-08-09 19:59 ` Anatoly Pugachev
2019-08-10 7:17 ` Christoph Hellwig
2019-08-10 19:36 ` Mikael Pettersson
2019-08-11 20:30 ` Anatoly Pugachev
2019-06-25 14:37 ` [PATCH 10/16] mm: rename CONFIG_HAVE_GENERIC_GUP to CONFIG_HAVE_FAST_GUP Christoph Hellwig
2019-06-25 14:37 ` [PATCH 11/16] mm: reorder code blocks in gup.c Christoph Hellwig
2019-06-25 14:37 ` [PATCH 12/16] mm: consolidate the get_user_pages* implementations Christoph Hellwig
2019-06-25 14:37 ` [PATCH 13/16] mm: validate get_user_pages_fast flags Christoph Hellwig
2019-06-25 14:37 ` [PATCH 14/16] mm: move the powerpc hugepd code to mm/gup.c Christoph Hellwig
2019-06-25 19:37 ` Andrew Morton
2019-06-26 5:49 ` Christoph Hellwig
2019-06-25 14:37 ` [PATCH 15/16] mm: switch gup_hugepte to use try_get_compound_head Christoph Hellwig
2019-06-25 14:37 ` [PATCH 16/16] mm: mark the page referenced in gup_hugepte Christoph Hellwig
-- strict thread matches above, loose matches on Subject: below --
2019-06-11 14:40 switch the remaining architectures to use generic GUP v3 Christoph Hellwig
2019-06-11 14:40 ` [PATCH 09/16] sparc64: use the generic get_user_pages_fast code Christoph Hellwig
2019-06-11 19:35 ` Khalid Aziz
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