[RFC PATCH v4 0/2] hung_task: Display every hung task warning

From: Aaron Tomlin When khungtaskd detects hung tasks, it prints out backtraces from a number of those tasks. Limiting the number of backtraces being printed out can result in the user not seeing the information necessary to debug the issue. The hung_task_warnings sysctl controls this feature. T

[RFC PATCH v4 1/2] sysctl: Make neg_one a standard constraint

From: Aaron Tomlin Add neg_one to the list of standard constraints. Signed-off-by: Aaron Tomlin Acked-by: Rik van Riel --- kernel/sysctl.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 34a6047..dd531a6 100644 --- a/kernel/sysctl.c +++ b/kernel/sy

[RFC PATCH v4 2/2] hung_task: Display every hung task warning

From: Aaron Tomlin When khungtaskd detects hung tasks, it prints out backtraces from a number of those tasks. Limiting the number of backtraces being printed out can result in the user not seeing the information necessary to debug the issue. The hung_task_warnings sysctl controls this feature. T

[RFC PATCH v3 1/2] sysctl: Make neg_one a standard constraint

From: Aaron Tomlin Add neg_one to the list of standard constraints. Signed-off-by: Aaron Tomlin --- kernel/sysctl.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 34a6047..dd531a6 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -122,6 +122,7 @

[RFC PATCH v3 0/2] hung_task: Display every hung task warning

From: Aaron Tomlin When khungtaskd detects hung tasks, it prints out backtraces from a number of those tasks. Sometimes the information on why things are stuck is hidden in those backtraces. Limiting the number of backtraces being printed out can result in the user not seeing the information nece

[RFC PATCH v3 2/2] hung_task: Display every hung task warning

From: Aaron Tomlin When khungtaskd detects hung tasks, it prints out backtraces from a number of those tasks. Sometimes the information on why things are stuck is hidden in those backtraces. Limiting the number of backtraces being printed out can result in the user not seeing the information nece

[RFC PATCH v2 0/2] hung_task: Display every hung task warning

From: Aaron Tomlin The khungtaskd thread limits how many hung task warnings it displays at a time, when a timeout occurs. This patch allows that limit to be set to "unlimited", by setting hung_task_warnings to -1, which will cause khungtaskd to display information about all hung tasks. While ULO

[RFC PATCH v2 2/2] hung_task: Display every hung task warning

From: Aaron Tomlin The khungtaskd thread limits how many hung task warnings it displays at a time, when a timeout occurs. This patch allows that limit to be set to "unlimited", by setting hung_task_warnings to -1, which will cause khungtaskd to display information about all hung tasks. While ULO

[RFC PATCH v2 1/2] sysctl: Make neg_one a standard constraint

From: Aaron Tomlin Add neg_one to the list of standard constraints. Signed-off-by: Aaron Tomlin --- kernel/sysctl.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 34a6047..dd531a6 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -122,6 +122,7 @

[RFC PATCH 2/2] hung_task: Display every hung task warning

From: Aaron Tomlin Enable hung_task_warnings to display every hung task warning when set to -1. Signed-off-by: Aaron Tomlin --- include/linux/sched/sysctl.h | 2 +- kernel/hung_task.c | 9 + kernel/sysctl.c | 5 +++-- 3 files changed, 9 insertions(+), 7 deletions

[RFC PATCH 1/2] sysctl: Make neg_one a standard constraint

From: Aaron Tomlin Add neg_one to the list of standard constraints. Signed-off-by: Aaron Tomlin --- kernel/sysctl.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 34a6047..dd531a6 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -122,6 +122,7 @

[RFC PATCH 0/2] hung_task: Display every hung task warning

From: Aaron Tomlin Enable hung_task_warnings to display every hung task warning, when set to -1. While ULONG_MAX is practically "unlimited", this patch takes it one step further. Note: The maximum is now 2^31-1 which should (hopefully) be sufficient. Please let me know your thoughts. Aaron Toml

[Patch v2] skbuff: Hide GFP_ATOMIC page allocation failures for dropped packets

From: Aaron Tomlin Since v1: - Removed unnecessary parentheses (sergei.shtylyov) ---8<--- Failed GFP_ATOMIC allocations by the network stack result in dropped packets, which will be received on a subsequent retransmit, and an unnecessary, noisy warning with a kernel backtrace. These warnings

[Patch v2] skbuff: Hide GFP_ATOMIC page allocation failures for dropped packets

From: Aaron Tomlin Since v1: - Removed unnecessary parentheses ---8<--- Failed GFP_ATOMIC allocations by the network stack result in dropped packets, which will be received on a subsequent retransmit, and an unnecessary, noisy warning with a kernel backtrace. These warnings are harmless, but

[Patch v1] skbuff: Hide GFP_ATOMIC page allocation failures for dropped packets

From: Aaron Tomlin Failed GFP_ATOMIC allocations by the network stack result in dropped packets, which will be received on a subsequent retransmit, and an unnecessary, noisy warning with a kernel backtrace. These warnings are harmless, but they still cause users to panic and file bug reports ove

[PATCH v3] mm: slab: Verify the nodeid passed to ____cache_alloc_node

From: Aaron Tomlin Hi, This patch is in response to BZ#42967 [1]. Using VM_BUG_ON so it's used only when CONFIG_DEBUG_VM is set, given that cache_alloc_node() is a hot code path. Cheers, Aaron [1]: https://bugzilla.kernel.org/show_bug.cgi?id=42967 ---8<--- mm: slab: Verify the nodeid pass