The following commit has been merged into the locking/core branch of tip: Commit-ID: e638072e61726cae363d48812815197a2a0e097f Gitweb: https://git.kernel.org/tip/e638072e61726cae363d48812815197a2a0e097f Author: Carlos Llamas <cmllamas@xxxxxxxxxx> AuthorDate: Thu, 24 Oct 2024 18:36:26 Committer: Boqun Feng <boqun.feng@xxxxxxxxx> CommitterDate: Sun, 15 Dec 2024 11:49:35 -08:00 lockdep: Fix upper limit for LOCKDEP_*_BITS configs Lockdep has a set of configs used to determine the size of the static arrays that it uses. However, the upper limit that was initially setup for these configs is too high (30 bit shift). This equates to several GiB of static memory for individual symbols. Using such high values leads to linker errors: $ make defconfig $ ./scripts/config -e PROVE_LOCKING --set-val LOCKDEP_BITS 30 $ make olddefconfig all [...] ld: kernel image bigger than KERNEL_IMAGE_SIZE ld: section .bss VMA wraps around address space Adjust the upper limits to the maximum values that avoid these issues. The need for anything more, likely points to a problem elsewhere. Note that LOCKDEP_CHAINS_BITS was intentionally left out as its upper limit had a different symptom and has already been fixed [1]. Reported-by: J. R. Okajima <hooanon05g@xxxxxxxxx> Closes: https://lore.kernel.org/all/30795.1620913191@jrobl/ [1] Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Boqun Feng <boqun.feng@xxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Waiman Long <longman@xxxxxxxxxx> Cc: Will Deacon <will@xxxxxxxxxx> Acked-by: Waiman Long <longman@xxxxxxxxxx> Signed-off-by: Carlos Llamas <cmllamas@xxxxxxxxxx> Signed-off-by: Boqun Feng <boqun.feng@xxxxxxxxx> Link: https://lore.kernel.org/r/20241024183631.643450-2-cmllamas@xxxxxxxxxx --- lib/Kconfig.debug | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 49a3819..7635b36 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1504,7 +1504,7 @@ config LOCKDEP_SMALL config LOCKDEP_BITS int "Bitsize for MAX_LOCKDEP_ENTRIES" depends on LOCKDEP && !LOCKDEP_SMALL - range 10 30 + range 10 24 default 15 help Try increasing this value if you hit "BUG: MAX_LOCKDEP_ENTRIES too low!" message. @@ -1520,7 +1520,7 @@ config LOCKDEP_CHAINS_BITS config LOCKDEP_STACK_TRACE_BITS int "Bitsize for MAX_STACK_TRACE_ENTRIES" depends on LOCKDEP && !LOCKDEP_SMALL - range 10 30 + range 10 26 default 19 help Try increasing this value if you hit "BUG: MAX_STACK_TRACE_ENTRIES too low!" message. @@ -1528,7 +1528,7 @@ config LOCKDEP_STACK_TRACE_BITS config LOCKDEP_STACK_TRACE_HASH_BITS int "Bitsize for STACK_TRACE_HASH_SIZE" depends on LOCKDEP && !LOCKDEP_SMALL - range 10 30 + range 10 26 default 14 help Try increasing this value if you need large STACK_TRACE_HASH_SIZE. @@ -1536,7 +1536,7 @@ config LOCKDEP_STACK_TRACE_HASH_BITS config LOCKDEP_CIRCULAR_QUEUE_BITS int "Bitsize for elements in circular_queue struct" depends on LOCKDEP - range 10 30 + range 10 26 default 12 help Try increasing this value if you hit "lockdep bfs error:-1" warning due to __cq_enqueue() failure.
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