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Merge tag 'rcu.release.v6.8' of https://github.com/neeraju/linux

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Pull RCU updates from Neeraj Upadhyay:

 - Documentation and comment updates

 - RCU torture, locktorture updates that include cleanups; nolibc init
   build support for mips, ppc and rv64; testing of mid stall duration
   scenario and fixing fqs task creation conditions

 - Misc fixes, most notably restricting usage of RCU CPU stall
   notifiers, to confine their usage primarily to debug kernels

 - RCU tasks minor fixes

 - lockdep annotation fix for NMI-safe accesses, callback
   advancing/acceleration cleanup and documentation improvements

* tag 'rcu.release.v6.8' of https://github.com/neeraju/linux:
  rcu: Force quiescent states only for ongoing grace period
  doc: Clarify historical disclaimers in memory-barriers.txt
  doc: Mention address and data dependencies in rcu_dereference.rst
  doc: Clarify RCU Tasks reader/updater checklist
  rculist.h: docs: Fix wrong function summary
  Documentation: RCU: Remove repeated word in comments
  srcu: Use try-lock lockdep annotation for NMI-safe access.
  srcu: Explain why callbacks invocations can't run concurrently
  srcu: No need to advance/accelerate if no callback enqueued
  srcu: Remove superfluous callbacks advancing from srcu_gp_start()
  rcu: Remove unused macros from rcupdate.h
  rcu: Restrict access to RCU CPU stall notifiers
  rcu-tasks: Mark RCU Tasks accesses to current->rcu_tasks_idle_cpu
  rcutorture: Add fqs_holdoff check before fqs_task is created
  rcutorture: Add mid-sized stall to TREE07
  rcutorture: add nolibc init support for mips, ppc and rv64
  locktorture: Increase Hamming distance between call_rcu_chain and rcu_call_chains
This commit is contained in:
Linus Torvalds
2024-01-12 16:35:58 -08:00
parent 38814330fe 7dfb03dd24
commit 23a80d462c
20 changed files with 150 additions and 66 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/locking/locktorture.c
+9 -9
View File
@@ -124,7 +124,7 @@ struct call_rcu_chain {
struct rcu_head crc_rh;
bool crc_stop;
};
struct call_rcu_chain *call_rcu_chain;
struct call_rcu_chain *call_rcu_chain_list;
/* Forward reference. */
static void lock_torture_cleanup(void);
@@ -1074,12 +1074,12 @@ static int call_rcu_chain_init(void)
if (call_rcu_chains <= 0)
return 0;
call_rcu_chain = kcalloc(call_rcu_chains, sizeof(*call_rcu_chain), GFP_KERNEL);
if (!call_rcu_chain)
call_rcu_chain_list = kcalloc(call_rcu_chains, sizeof(*call_rcu_chain_list), GFP_KERNEL);
if (!call_rcu_chain_list)
return -ENOMEM;
for (i = 0; i < call_rcu_chains; i++) {
call_rcu_chain[i].crc_stop = false;
call_rcu(&call_rcu_chain[i].crc_rh, call_rcu_chain_cb);
call_rcu_chain_list[i].crc_stop = false;
call_rcu(&call_rcu_chain_list[i].crc_rh, call_rcu_chain_cb);
}
return 0;
}
@@ -1089,13 +1089,13 @@ static void call_rcu_chain_cleanup(void)
{
int i;
if (!call_rcu_chain)
if (!call_rcu_chain_list)
return;
for (i = 0; i < call_rcu_chains; i++)
smp_store_release(&call_rcu_chain[i].crc_stop, true);
smp_store_release(&call_rcu_chain_list[i].crc_stop, true);
rcu_barrier();
kfree(call_rcu_chain);
call_rcu_chain = NULL;
kfree(call_rcu_chain_list);
call_rcu_chain_list = NULL;
}
static void lock_torture_cleanup(void)