From: Reza Arbab <arbab@linux.ibm.com>
To: Nicholas Piggin <npiggin@gmail.com>
Cc: Santosh Sivaraj <santosh@fossix.org>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Mahesh Salgaonkar <mahesh@linux.ibm.com>,
Chandan Rajendra <chandan@linux.vnet.ibm.com>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [v2 09/12] powerpc/mce: Enable MCE notifiers in external modules
Date: Mon, 8 Jul 2019 10:23:18 -0500 [thread overview]
Message-ID: <20190708152317.t7rx7n5bxhrhv4dz@arbab-laptop.localdomain> (raw)
In-Reply-To: <1562304274.ecukc5yx4t.astroid@bobo.none>
On Fri, Jul 05, 2019 at 03:29:39PM +1000, Nicholas Piggin wrote:
>Okay. It might be possible to save the address in the kernel and
>then notify the driver afterward. For user-mode and any non-atomic
>user copy AFAIK the irq_work should practically run synchronously
>after the machine check returns so it might be enough to have a
>notifier in the irq work processing.
We can pick up this thread later, but if I remember correctly the
sticking point we ran into was that we never got that far. Instead of
returning from the MCE, we went down the fatal codepath.
--
Reza Arbab
next prev parent reply other threads:[~2019-07-08 15:27 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-02 5:19 [v2 00/12] powerpc: implement machine check safe memcpy Santosh Sivaraj
2019-07-02 5:19 ` [v2 01/12] powerpc/mce: Make machine_check_ue_event() static Santosh Sivaraj
2019-07-02 5:19 ` [v2 02/12] powerpc/mce: Bug fixes for MCE handling in kernel space Santosh Sivaraj
2019-07-02 5:19 ` [v2 03/12] powerpc/mce: Add MCE notification chain Santosh Sivaraj
2019-07-02 14:55 ` Reza Arbab
2019-07-02 5:19 ` [v2 04/12] powerpc/mce: Move machine_check_ue_event() call Santosh Sivaraj
2019-07-02 5:19 ` [v2 05/12] powerpc/mce: Allow notifier callback to handle MCE Santosh Sivaraj
2019-07-02 5:19 ` [v2 06/12] powerpc/mce: Add fixup address to UE events Santosh Sivaraj
2019-07-02 5:19 ` [v2 07/12] powerpc/memcpy: Add memcpy_mcsafe for pmem Santosh Sivaraj
2019-07-02 5:19 ` [v2 08/12] powerpc/mce: Handle memcpy_mcsafe() Santosh Sivaraj
2019-07-02 5:19 ` [v2 09/12] powerpc/mce: Enable MCE notifiers in external modules Santosh Sivaraj
2019-07-02 6:17 ` Nicholas Piggin
2019-07-02 9:33 ` Mahesh Jagannath Salgaonkar
2019-07-03 17:20 ` Reza Arbab
2019-07-04 2:36 ` Nicholas Piggin
2019-07-05 2:50 ` Reza Arbab
2019-07-05 5:29 ` Nicholas Piggin
2019-07-08 15:23 ` Reza Arbab [this message]
2019-07-02 5:19 ` [v2 10/12] powerpc/memcpy_mcsafe: return remaining bytes Santosh Sivaraj
2019-07-02 5:19 ` [v2 11/12] powerpc: add machine check safe copy_to_user Santosh Sivaraj
2019-07-02 5:19 ` [v2 12/12] powerpc/64s: Save r13 in machine_check_common_early Santosh Sivaraj
2019-07-02 6:19 ` Nicholas Piggin
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