[PATCH v9 06/25] dept: Add proc knobs to show stats and dependency graph

It'd be useful to show Dept internal stats and dependency graph on runtime via proc for better information. Introduced the knobs. Signed-off-by: Byungchul Park --- kernel/dependency/Makefile| 1 + kernel/dependency/dept.c | 24 -- kernel/dependency/dept_internal.h | 26

[PATCH v9 19/25] dept: Apply timeout consideration to swait

Now that CONFIG_DEPT_AGGRESSIVE_TIMEOUT_WAIT was introduced, apply the consideration to swait, assuming an input 'ret' in ___swait_event() macro is used as a timeout value. Signed-off-by: Byungchul Park --- include/linux/swait.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a

[PATCH v9 07/25] dept: Apply sdt_might_sleep_{start, end}() to wait_for_completion()/complete()

Makes Dept able to track dependencies by wait_for_completion()/complete(). Signed-off-by: Byungchul Park --- include/linux/completion.h | 30 +- 1 file changed, 25 insertions(+), 5 deletions(-) diff --git a/include/linux/completion.h b/include/linux/completion.h inde

[PATCH v9 01/25] llist: Move llist_{head,node} definition to types.h

llist_head and llist_node can be used by very primitives. For example, Dept for tracking dependency uses llist things in its header. To avoid header dependency, move those to types.h. Signed-off-by: Byungchul Park --- include/linux/llist.h | 8 include/linux/types.h | 8 2 file

[PATCH v9 04/25] dept: Add lock dependency tracker APIs

Wrapped the base APIs for easier annotation on typical lock. Signed-off-by: Byungchul Park --- include/linux/dept_ldt.h | 77 1 file changed, 77 insertions(+) create mode 100644 include/linux/dept_ldt.h diff --git a/include/linux/dept_ldt.h b/in

[PATCH v9 20/25] dept: Apply timeout consideration to waitqueue wait

Now that CONFIG_DEPT_AGGRESSIVE_TIMEOUT_WAIT was introduced, apply the consideration to waitqueue wait, assuming an input 'ret' in ___wait_event() macro is used as a timeout value. Signed-off-by: Byungchul Park --- include/linux/wait.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff

[PATCH v9 22/25] dept: Apply timeout consideration to dma fence wait

Now that CONFIG_DEPT_AGGRESSIVE_TIMEOUT_WAIT was introduced, apply the consideration to dma fence wait. Signed-off-by: Byungchul Park --- drivers/dma-buf/dma-fence.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c

[PATCH v9 05/25] dept: Tie to Lockdep and IRQ tracing

Yes. How to place Dept in here looks so ugly. But it's inevitable as long as relying on Lockdep. The way should be enhanced gradually. 1. Basically relies on Lockdep to track typical locks and IRQ things. 2. Dept fails to recognize IRQ situation so it generates false alarms when raw_l

[PATCH v9 11/25] dept: Apply sdt_might_sleep_{start, end}() to hashed-waitqueue wait

Makes Dept able to track dependencies by hashed-waitqueue waits. Signed-off-by: Byungchul Park --- include/linux/wait_bit.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/wait_bit.h b/include/linux/wait_bit.h index 7725b75..fe89282 100644 --- a/include/linux/wait_bit.h +++

[PATCH v9 21/25] dept: Apply timeout consideration to hashed-waitqueue wait

Now that CONFIG_DEPT_AGGRESSIVE_TIMEOUT_WAIT was introduced, apply the consideration to hashed-waitqueue wait, assuming an input 'ret' in ___wait_var_event() macro is used as a timeout value. Signed-off-by: Byungchul Park --- include/linux/wait_bit.h | 2 +- 1 file changed, 1 insertion(+), 1 del

[RESEND PATCH] drm/panel: otm8009a: Set backlight parent to panel device

This is the logical place to put the backlight device, and it also fixes a kernel crash if the MIPI host is removed. Previously the backlight device would be unregistered twice when this happened - once as a child of the MIPI host through `mipi_dsi_host_unregister`, and once when the panel device i

[PATCH v9 17/25] dept: Track timeout waits separately with a new Kconfig

Waits with valid timeouts don't actually cause deadlocks. However, Dept has been reporting the cases as well because it's worth informing the circular dependency for some cases where, for example, timeout is used to avoid a deadlock but not meant to be expired. However, yes, there are also a lot o

Re: (subset) [PATCH 00/35] Documentation: correct lots of spelling errors (series 1)

On Thu, 26 Jan 2023 22:39:30 -0800, Randy Dunlap wrote: > Correct many spelling errors in Documentation/ as reported by codespell. > > Maintainers of specific kernel subsystems are only Cc-ed on their > respective patches, not the entire series. [if all goes well] > > These patches are based on l

[PATCH v9 25/25] dept: Track the potential waits of PG_{locked, writeback}

Currently, Dept only tracks the real waits of PG_{locked,writeback} that actually happened having gone through __schedule() to avoid false positives. However, it ends in limited capacity for deadlock detection, because anyway there might be still way more potential dependencies by the waits that ha

[PATCH v9 03/25] dept: Add single event dependency tracker APIs

Wrapped the base APIs for easier annotation on wait and event. Start with supporting waiters on each single event. More general support for multiple events is a future work. Do more when the need arises. How to annotate (the simplest way): 1. Initaialize a map for the interesting wait. /*

Re: [PATCH v12 00/18] drm: Add Samsung MIPI DSIM bridge

On 26.01.23 15:44, Jagan Teki wrote: > This series supports common bridge support for Samsung MIPI DSIM > which is used in Exynos and i.MX8MM SoC's. > > The final bridge supports both the Exynos and i.MX8M Mini/Nano/Plus. > > Patch 0001 - 0004: adding devm_drm_of_dsi_get_bridge > > Patch 0005 -

Re: [Nouveau] [PATCH drm-next 05/14] drm/nouveau: new VM_BIND uapi interfaces

On Mon, 30 Jan 2023 at 23:02, Christian König wrote: > > Am 29.01.23 um 19:46 schrieb Danilo Krummrich: > > On 1/27/23 22:09, Danilo Krummrich wrote: > >> On 1/27/23 16:17, Christian König wrote: > >>> Am 27.01.23 um 15:44 schrieb Danilo Krummrich: > [SNIP] > >>> > >>> What you want i

<    1   2