Rename param_spinlock to global_spinlock and introduce a global queue of all used buffers. The queue will be used in the following patches.
Signed-off-by: Mikulas Patocka <[email protected]> --- drivers/md/dm-bufio.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) Index: linux-2.6/drivers/md/dm-bufio.c =================================================================== --- linux-2.6.orig/drivers/md/dm-bufio.c 2019-09-10 16:54:13.000000000 +0200 +++ linux-2.6/drivers/md/dm-bufio.c 2019-09-11 19:40:27.000000000 +0200 @@ -133,6 +133,7 @@ enum data_mode { struct dm_buffer { struct rb_node node; struct list_head lru_list; + struct list_head global_list; sector_t block; void *data; unsigned char data_mode; /* DATA_MODE_* */ @@ -193,7 +194,9 @@ static unsigned long dm_bufio_cache_size */ static unsigned long dm_bufio_cache_size_latch; -static DEFINE_SPINLOCK(param_spinlock); +static DEFINE_SPINLOCK(global_spinlock); + +static LIST_HEAD(global_queue); /* * Buffers are freed after this timeout @@ -302,7 +305,7 @@ static void adjust_total_allocated(struc if (unlink) diff = -diff; - spin_lock(¶m_spinlock); + spin_lock(&global_spinlock); *class_ptr[data_mode] += diff; @@ -311,7 +314,13 @@ static void adjust_total_allocated(struc if (dm_bufio_current_allocated > dm_bufio_peak_allocated) dm_bufio_peak_allocated = dm_bufio_current_allocated; - spin_unlock(¶m_spinlock); + if (!unlink) { + list_add(&b->global_list, &global_queue); + } else { + list_del(&b->global_list); + } + + spin_unlock(&global_spinlock); } /* -- dm-devel mailing list [email protected] https://www.redhat.com/mailman/listinfo/dm-devel
