[PATCH -next v3 00/25] md: synchronize io with array reconfiguration · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 01/25] md: use READ_ONCE/WRITE_ONCE for 'suspend_lo' and 'suspend_hi' · Yu Kuai <hidden> · 2023-09-28
Re: [PATCH -next v3 01/25] md: use READ_ONCE/WRITE_ONCE for 'suspend_lo' and 'suspend_hi' · Song Liu <song@kernel.org> · 2023-09-28
[PATCH -next v3 04/25] md: add new helpers to suspend/resume and lock/unlock array · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 05/25] md: use new apis to suspend array for suspend_lo/hi_store() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 02/25] md: replace is_md_suspended() with 'mddev->suspended' in md_check_recovery() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 03/25] md: add new helpers to suspend/resume array · Yu Kuai <hidden> · 2023-09-28
Re: [PATCH -next v3 03/25] md: add new helpers to suspend/resume array · Song Liu <song@kernel.org> · 2023-09-28
[PATCH -next v3 06/25] md: use new apis to suspend array for level_store() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 07/25] md: use new apis to suspend array for serialize_policy_store() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 09/25] md/md-bitmap: use new apis to suspend array for location_store() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 10/25] md/raid5-cache: use READ_ONCE/WRITE_ONCE for 'conf->log' · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 08/25] md/dm-raid: use new apis to suspend array · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 14/25] md/raid5: use new apis to suspend array for raid5_store_skip_copy() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 11/25] md/raid5-cache: use new apis to suspend array for r5c_disable_writeback_async() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 17/25] md/raid5: replace suspend with quiesce() callback · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 16/25] md/raid5: use new apis to suspend array for raid5_change_consistency_policy() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 12/25] md/raid5-cache: use new apis to suspend array for r5c_journal_mode_store() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 15/25] md/raid5: use new apis to suspend array for raid5_store_group_thread_cnt() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 18/25] md: use new apis to suspend array for ioctls involed array reconfiguration · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 13/25] md/raid5: use new apis to suspend array for raid5_store_stripe_size() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 22/25] md/md-linear: cleanup linear_add() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 20/25] md: use new apis to suspend array before mddev_create/destroy_serial_pool · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 21/25] md: cleanup mddev_create/destroy_serial_pool() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 23/25] md: suspend array in md_start_sync() if array need reconfiguration · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 24/25] md: remove old apis to suspend the array · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 19/25] md: use new apis to suspend array for adding/removing rdev from state_store() · Yu Kuai <hidden> · 2023-09-28
[PATCH -next v3 25/25] md: rename __mddev_suspend/resume() back to mddev_suspend/resume() · Yu Kuai <hidden> · 2023-09-28
Re: [PATCH -next v3 00/25] md: synchronize io with array reconfiguration · Song Liu <song@kernel.org> · 2023-09-28

Re: [PATCH -next v3 01/25] md: use READ_ONCE/WRITE_ONCE for 'suspend_lo' and 'suspend_hi'

From: Song Liu <song@kernel.org>
Date: 2023-09-28 15:54:26
Also in: dm-devel, lkml

On Wed, Sep 27, 2023 at 11:22 PM Yu Kuai [off-list ref] wrote:

From: Yu Kuai <redacted>

Because reading 'suspend_lo' and 'suspend_hi' from md_handle_request()
is not protected, use READ_ONCE/WRITE_ONCE to prevent reading abnormal
value.

I rephrase this a bit:

Protect 'suspend_lo' and 'suspend_hi' with READ_ONCE/WRITE_ONCE to prevent
reading abnormal values.

Thanks,
Song

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