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block: assign caller-specific lockdep class to disk->open_mutex#909

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block: assign caller-specific lockdep class to disk->open_mutex#909
blktests-ci[bot] wants to merge 1 commit into
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@blktests-ci blktests-ci Bot commented May 30, 2026

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Pull request for series with
subject: block: assign caller-specific lockdep class to disk->open_mutex
version: 1
url: https://patchwork.kernel.org/project/linux-block/list/?series=1103282

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Upstream branch: 8fde5d1
series: https://patchwork.kernel.org/project/linux-block/list/?series=1103282
version: 1

@blktests-ci blktests-ci Bot force-pushed the linus-master_base branch from 3f4a345 to c6dc343 Compare June 1, 2026 08:57
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blktests-ci Bot commented Jun 1, 2026

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Upstream branch: e43ffb6
series: https://patchwork.kernel.org/project/linux-block/list/?series=1103282
version: 1

@blktests-ci blktests-ci Bot force-pushed the series/1103282=>linus-master branch from 6052a26 to bdc651c Compare June 1, 2026 09:14
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blktests-ci Bot commented Jun 3, 2026

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Upstream branch: e43ffb6
series: https://patchwork.kernel.org/project/linux-block/list/?series=1105056
version: 2

@blktests-ci blktests-ci Bot added V2 and removed V1 labels Jun 3, 2026
@blktests-ci blktests-ci Bot force-pushed the series/1103282=>linus-master branch from bdc651c to 66a6a6c Compare June 3, 2026 06:45
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Upstream branch: e43ffb6
series: https://patchwork.kernel.org/project/linux-block/list/?series=1105264
version: 3

@blktests-ci blktests-ci Bot added V3 and removed V2 labels Jun 3, 2026
@blktests-ci blktests-ci Bot force-pushed the series/1103282=>linus-master branch from 66a6a6c to 3cd4902 Compare June 3, 2026 12:00
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Upstream branch: ba3e43a
series: https://patchwork.kernel.org/project/linux-block/list/?series=1105264
version: 3

@blktests-ci blktests-ci Bot force-pushed the series/1103282=>linus-master branch from 3cd4902 to 27b4aa0 Compare June 3, 2026 14:08
@blktests-ci blktests-ci Bot force-pushed the linus-master_base branch from fc36596 to 7bed9c3 Compare June 5, 2026 09:48
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Upstream branch: ddd664b
series: https://patchwork.kernel.org/project/linux-block/list/?series=1105264
version: 3

@blktests-ci blktests-ci Bot force-pushed the series/1103282=>linus-master branch from 27b4aa0 to 4b7fd7f Compare June 5, 2026 09:56
@blktests-ci blktests-ci Bot force-pushed the linus-master_base branch from 7bed9c3 to a7bb5c5 Compare June 7, 2026 14:54
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Upstream branch: 979c294
series: https://patchwork.kernel.org/project/linux-block/list/?series=1105264
version: 3

@blktests-ci blktests-ci Bot force-pushed the series/1103282=>linus-master branch from 4b7fd7f to b9bb292 Compare June 7, 2026 15:02
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Upstream branch: acb7500
series: https://patchwork.kernel.org/project/linux-block/list/?series=1105264
version: 3

@blktests-ci blktests-ci Bot force-pushed the series/1103282=>linus-master branch from b9bb292 to eb41824 Compare June 10, 2026 13:39
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Upstream branch: 9716c08
series: https://patchwork.kernel.org/project/linux-block/list/?series=1105264
version: 3

@blktests-ci blktests-ci Bot force-pushed the series/1103282=>linus-master branch from eb41824 to dcbbad1 Compare June 10, 2026 21:03
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Upstream branch: 2a2974b
series: https://patchwork.kernel.org/project/linux-block/list/?series=1105264
version: 3

@blktests-ci blktests-ci Bot force-pushed the series/1103282=>linus-master branch from dcbbad1 to 506b1f5 Compare June 12, 2026 23:03
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blktests-ci Bot commented Jun 13, 2026

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Upstream branch: 062871f
series: https://patchwork.kernel.org/project/linux-block/list/?series=1105264
version: 3

@blktests-ci blktests-ci Bot force-pushed the series/1103282=>linus-master branch from 506b1f5 to 75dfb3e Compare June 13, 2026 02:00
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blktests-ci Bot commented Jun 17, 2026

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Upstream branch: 66affa3
series: https://patchwork.kernel.org/project/linux-block/list/?series=1105264
version: 3

@blktests-ci blktests-ci Bot force-pushed the series/1103282=>linus-master branch from 75dfb3e to bf1acbf Compare June 17, 2026 14:32
@blktests-ci blktests-ci Bot force-pushed the linus-master_base branch from e6d9eb8 to 7d8604f Compare June 24, 2026 01:11
block: assign caller-specific lockdep class to disk->open_mutex
1cfa76e 
The block core currently allocates a single monolithic lockdep key for
disk->open_mutex across all callers. This single key conflates locking
hierarchies between independent block streams. For example, if a stacked
driver like loop flushes its internal workqueues inside lo_release() while
holding its own open_mutex, lockdep views this as a potential ABBA deadlock
against the underlying storage stack, leading to numerous circular
dependency splats.

To structurally reduce false positives, this patch splits the global
monolithic lock class into distinct, per-caller instances during disk
allocation. This is done by replacing "struct lock_class_key" with
"struct gendisk_lkclass", which contains two instances of
"struct lock_class_key" for the legacy "(bio completion)" map and
disk->open_mutex respectively.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
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blktests-ci Bot commented Jun 24, 2026

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Upstream branch: bade58e
series: https://patchwork.kernel.org/project/linux-block/list/?series=1105264
version: 3

@blktests-ci blktests-ci Bot force-pushed the series/1103282=>linus-master branch from bf1acbf to 1cfa76e Compare June 24, 2026 01:51
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