The patch titled
Subject: aio: give shared kioctx fields their own cachelines
has been removed from the -mm tree. Its filename was
aio-give-shared-kioctx-fields-their-own-cachelines.patch
This patch was dropped because an updated version will be merged
------------------------------------------------------
From: Kent Overstreet <koverstreet@xxxxxxxxxx>
Subject: aio: give shared kioctx fields their own cachelines
[akpm@xxxxxxxxxxxxxxxxxxxx: make reqs_active __cacheline_aligned_in_smp]
Signed-off-by: Kent Overstreet <koverstreet@xxxxxxxxxx>
Cc: Zach Brown <zab@xxxxxxxxxx>
Cc: Felipe Balbi <balbi@xxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Mark Fasheh <mfasheh@xxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Asai Thambi S P <asamymuthupa@xxxxxxxxxx>
Cc: Selvan Mani <smani@xxxxxxxxxx>
Cc: Sam Bradshaw <sbradshaw@xxxxxxxxxx>
Cc: Jeff Moyer <jmoyer@xxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Benjamin LaHaise <bcrl@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/aio.c | 27 +++++++++++++++------------
1 file changed, 15 insertions(+), 12 deletions(-)
diff -puN fs/aio.c~aio-give-shared-kioctx-fields-their-own-cachelines fs/aio.c
--- a/fs/aio.c~aio-give-shared-kioctx-fields-their-own-cachelines
+++ a/fs/aio.c
@@ -67,13 +67,6 @@ struct kioctx {
unsigned long user_id;
struct hlist_node list;
- wait_queue_head_t wait;
-
- spinlock_t ctx_lock;
-
- atomic_t reqs_active;
- struct list_head active_reqs; /* used for cancellation */
-
unsigned nr;
/* sys_io_setup currently limits this to an unsigned int */
@@ -85,19 +78,29 @@ struct kioctx {
struct page **ring_pages;
long nr_pages;
+ struct rcu_head rcu_head;
+ struct work_struct rcu_work;
+
+ struct {
+ atomic_t reqs_active;
+ } ____cacheline_aligned_in_smp;
+
+ struct {
+ spinlock_t ctx_lock;
+ struct list_head active_reqs; /* used for cancellation */
+ } ____cacheline_aligned_in_smp;
+
struct {
struct mutex ring_lock;
- } ____cacheline_aligned;
+ wait_queue_head_t wait;
+ } ____cacheline_aligned_in_smp;
struct {
unsigned tail;
spinlock_t completion_lock;
- } ____cacheline_aligned;
+ } ____cacheline_aligned_in_smp;
struct page *internal_pages[AIO_RING_PAGES];
-
- struct rcu_head rcu_head;
- struct work_struct rcu_work;
};
/*------ sysctl variables----*/
_
Patches currently in -mm which might be from koverstreet@xxxxxxxxxx are
aio-reqs_active-reqs_available.patch
aio-percpu-reqs_available.patch
generic-dynamic-per-cpu-refcounting.patch
aio-percpu-ioctx-refcount.patch
aio-use-xchg-instead-of-completion_lock.patch
aio-dont-include-aioh-in-schedh.patch
aio-kill-ki_key.patch
aio-kill-ki_retry.patch
block-aio-batch-completion-for-bios-kiocbs.patch
virtio-blk-convert-to-batch-completion.patch
mtip32xx-convert-to-batch-completion.patch
aio-fix-aio_read_events_ring-types.patch
aio-document-clarify-aio_read_events-and-shadow_tail.patch
aio-correct-calculation-of-available-events.patch
aio-v2-fix-kioctx-not-being-freed-after-cancellation-at-exit-time.patch
aio-fix-ringbuffer-calculation-so-we-dont-wrap.patch
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