Subject: + mm-memory-failurec-support-dedicated-thread-to-handle-sigbusbus_mceerr_ao-fix.patch added to -mm tree
To: n-horiguchi@xxxxxxxxxxxxx,andi@xxxxxxxxxxxxxx,bp@xxxxxxx,gong.chen@xxxxxxxxxxxxxxxxxx,iskra@xxxxxxxxxxx,tony.luck@xxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 03 Jun 2014 14:08:11 -0700
The patch titled
Subject: mm-memory-failurec-support-dedicated-thread-to-handle-sigbusbus_mceerr_ao-fix
has been added to the -mm tree. Its filename is
mm-memory-failurec-support-dedicated-thread-to-handle-sigbusbus_mceerr_ao-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memory-failurec-support-dedicated-thread-to-handle-sigbusbus_mceerr_ao-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memory-failurec-support-dedicated-thread-to-handle-sigbusbus_mceerr_ao-fix.patch
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------------------------------------------------------
From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Subject: mm-memory-failurec-support-dedicated-thread-to-handle-sigbusbus_mceerr_ao-fix
We don't need this rcu_read_lock().
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Kamil Iskra <iskra@xxxxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxx>
Cc: Chen Gong <gong.chen@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff -puN mm/memory-failure.c~mm-memory-failurec-support-dedicated-thread-to-handle-sigbusbus_mceerr_ao-fix mm/memory-failure.c
--- a/mm/memory-failure.c~mm-memory-failurec-support-dedicated-thread-to-handle-sigbusbus_mceerr_ao-fix
+++ a/mm/memory-failure.c
@@ -384,19 +384,18 @@ static void kill_procs(struct list_head
* Find a dedicated thread which is supposed to handle SIGBUS(BUS_MCEERR_AO)
* on behalf of the thread group. Return task_struct of the (first found)
* dedicated thread if found, and return NULL otherwise.
+ *
+ * We already hold read_lock(&tasklist_lock) in the caller, so we don't
+ * have to call rcu_read_lock/unlock() in this function.
*/
static struct task_struct *find_early_kill_thread(struct task_struct *tsk)
{
struct task_struct *t;
- rcu_read_lock();
for_each_thread(tsk, t)
if ((t->flags & PF_MCE_PROCESS) && (t->flags & PF_MCE_EARLY))
- goto found;
- t = NULL;
-found:
- rcu_read_unlock();
- return t;
+ return t;
+ return NULL;
}
/*
_
Patches currently in -mm which might be from n-horiguchi@xxxxxxxxxxxxx are
tools-vm-page-typesc-catch-sigbus-if-raced-with-truncate.patch
pass-on-hwpoison-maintainership-to-naoya-noriguchi.patch
hugetlb-restrict-hugepage_migration_support-to-x86_64.patch
mm-hugetlbfs-fix-rmapping-for-anonymous-hugepages-with-page_pgoff.patch
mm-hugetlbfs-fix-rmapping-for-anonymous-hugepages-with-page_pgoff-v2.patch
mm-hugetlbfs-fix-rmapping-for-anonymous-hugepages-with-page_pgoff-v3.patch
mm-hugetlbfs-fix-rmapping-for-anonymous-hugepages-with-page_pgoff-v3-fix.patch
pagewalk-update-page-table-walker-core.patch
pagewalk-update-page-table-walker-core-fix-end-address-calculation-in-walk_page_range.patch
pagewalk-update-page-table-walker-core-fix-end-address-calculation-in-walk_page_range-fix.patch
pagewalk-update-page-table-walker-core-fix.patch
pagewalk-add-walk_page_vma.patch
smaps-redefine-callback-functions-for-page-table-walker.patch
clear_refs-redefine-callback-functions-for-page-table-walker.patch
pagemap-redefine-callback-functions-for-page-table-walker.patch
pagemap-redefine-callback-functions-for-page-table-walker-fix.patch
numa_maps-redefine-callback-functions-for-page-table-walker.patch
memcg-redefine-callback-functions-for-page-table-walker.patch
arch-powerpc-mm-subpage-protc-use-walk_page_vma-instead-of-walk_page_range.patch
pagewalk-remove-argument-hmask-from-hugetlb_entry.patch
pagewalk-remove-argument-hmask-from-hugetlb_entry-fix.patch
pagewalk-remove-argument-hmask-from-hugetlb_entry-fix-fix.patch
mempolicy-apply-page-table-walker-on-queue_pages_range.patch
mm-add-pte_present-check-on-existing-hugetlb_entry-callbacks.patch
mm-pagewalkc-move-pte-null-check.patch
mm-softdirty-clear-vm_softdirty-flag-inside-clear_refs_write-instead-of-clear_soft_dirty.patch
mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
hugetlb-prep_compound_gigantic_page-drop-__init-marker.patch
hugetlb-add-hstate_is_gigantic.patch
hugetlb-update_and_free_page-dont-clear-pg_reserved-bit.patch
hugetlb-move-helpers-up-in-the-file.patch
hugetlb-add-support-for-gigantic-page-allocation-at-runtime.patch
mm-compaction-clean-up-unused-code-lines.patch
mm-compaction-cleanup-isolate_freepages.patch
mm-compaction-cleanup-isolate_freepages-fix.patch
mm-compaction-cleanup-isolate_freepages-fix-2.patch
mm-compaction-cleanup-isolate_freepages-fix3.patch
mm-migration-add-destination-page-freeing-callback.patch
mm-compaction-return-failed-migration-target-pages-back-to-freelist.patch
mm-compaction-add-per-zone-migration-pfn-cache-for-async-compaction.patch
mm-compaction-embed-migration-mode-in-compact_control.patch
mm-compaction-embed-migration-mode-in-compact_control-fix.patch
mm-thp-avoid-excessive-compaction-latency-during-fault.patch
mm-thp-avoid-excessive-compaction-latency-during-fault-fix.patch
mm-compaction-do-not-count-migratepages-when-unnecessary.patch
mm-compaction-avoid-rescanning-pageblocks-in-isolate_freepages.patch
mm-compaction-avoid-rescanning-pageblocks-in-isolate_freepages-fix.patch
mm-memory-failurec-move-comment.patch
mm-compaction-properly-signal-and-act-upon-lock-and-need_sched-contention.patch
hwpoison-remove-unused-global-variable-in-do_machine_check.patch
mm-prom-pid-clear_refs-avoid-split_huge_page.patch
hugetlb-rename-hugepage_migration_support-to-_supported.patch
memory-failure-send-right-signal-code-to-correct-thread.patch
memory-failure-dont-let-collect_procs-skip-over-processes-for-mf_action_required.patch
mm-memory-failurec-support-dedicated-thread-to-handle-sigbusbus_mceerr_ao.patch
mm-memory-failurec-support-dedicated-thread-to-handle-sigbusbus_mceerr_ao-checkpatch-fixes.patch
mm-memory-failurec-support-dedicated-thread-to-handle-sigbusbus_mceerr_ao-fix.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
linux-next.patch
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