linux-kernel - Re: [PATCH v2 0/2] Fix test_resume failure by openning swap device non-exclusively

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Date:   Tue, 11 Apr 2023 11:00:50 +0530
From:   Pavan Kondeti <quic_pkondeti@...cinc.com>
To:     Chen Yu <yu.c.chen@...el.com>
CC:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <len.brown@...el.com>, Ye Bin <yebin10@...wei.com>,
        Pavankumar Kondeti <quic_pkondeti@...cinc.com>,
        <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 0/2] Fix test_resume failure by openning swap device
 non-exclusively

On Tue, Apr 11, 2023 at 08:18:43PM +0800, Chen Yu wrote:
> test_resume does not work in current kernel when using swapfile for hibernation.
> This is because the swap device should be openned non-exclusively in test_resume mode.
> 
> Patch 1 is a preparation for patch 2 and it turns snapshot_test into a global variable.
> Patch 2 opens swap device non-exclusively for test_resume mode, and exclusively for manual
> hibernation resume.
> 
> Change since v1:
> Turn snapshot_test into global variable and do not introduce parameters for swsusp_check()
> nor load_image_and_restore().
> 
> 
> Chen Yu (2):
>   PM: hibernate: Turn snapshot_test into global variable
>   PM: hibernate: Do not get block device exclusively in test_resume mode
> 
>  kernel/power/hibernate.c | 12 +++++++++---
>  kernel/power/power.h     |  1 +
>  kernel/power/swap.c      |  5 +++--
>  3 files changed, 13 insertions(+), 5 deletions(-)
> 
Looks good to me.

I have verified test_resume on QEMU arm64 and it worked fine with
these two patches included.

Thanks,
Pavan