Messages in this thread Patch in this message | | | Date | Tue, 21 Jul 2009 23:13:13 +0900 (JST) | Subject | [PATCH 4/9] blkio-cgroup-v9: Refactoring io-context initialization | From | Ryo Tsuruta <> |
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This patch refactors io_context initialization.
Signed-off-by: Hirokazu Takahashi <taka@valinux.co.jp> Signed-off-by: Ryo Tsuruta <ryov@valinux.co.jp>
--- block/blk-ioc.c | 30 +++++++++++++++++------------- include/linux/iocontext.h | 1 + 2 files changed, 18 insertions(+), 13 deletions(-)
Index: linux-2.6.31-rc3/block/blk-ioc.c =================================================================== --- linux-2.6.31-rc3.orig/block/blk-ioc.c +++ linux-2.6.31-rc3/block/blk-ioc.c @@ -84,24 +84,28 @@ void exit_io_context(void) } } +void init_io_context(struct io_context *ioc) +{ + atomic_set(&ioc->refcount, 1); + atomic_set(&ioc->nr_tasks, 1); + spin_lock_init(&ioc->lock); + ioc->ioprio_changed = 0; + ioc->ioprio = 0; + ioc->last_waited = jiffies; /* doesn't matter... */ + ioc->nr_batch_requests = 0; /* because this is 0 */ + ioc->aic = NULL; + INIT_RADIX_TREE(&ioc->radix_root, GFP_ATOMIC | __GFP_HIGH); + INIT_HLIST_HEAD(&ioc->cic_list); + ioc->ioc_data = NULL; +} + struct io_context *alloc_io_context(gfp_t gfp_flags, int node) { struct io_context *ret; ret = kmem_cache_alloc_node(iocontext_cachep, gfp_flags, node); - if (ret) { - atomic_long_set(&ret->refcount, 1); - atomic_set(&ret->nr_tasks, 1); - spin_lock_init(&ret->lock); - ret->ioprio_changed = 0; - ret->ioprio = 0; - ret->last_waited = jiffies; /* doesn't matter... */ - ret->nr_batch_requests = 0; /* because this is 0 */ - ret->aic = NULL; - INIT_RADIX_TREE(&ret->radix_root, GFP_ATOMIC | __GFP_HIGH); - INIT_HLIST_HEAD(&ret->cic_list); - ret->ioc_data = NULL; - } + if (ret) + init_io_context(ret); return ret; } Index: linux-2.6.31-rc3/include/linux/iocontext.h =================================================================== --- linux-2.6.31-rc3.orig/include/linux/iocontext.h +++ linux-2.6.31-rc3/include/linux/iocontext.h @@ -104,6 +104,7 @@ int put_io_context(struct io_context *io void exit_io_context(void); struct io_context *get_io_context(gfp_t gfp_flags, int node); struct io_context *alloc_io_context(gfp_t gfp_flags, int node); +void init_io_context(struct io_context *ioc); void copy_io_context(struct io_context **pdst, struct io_context **psrc); #else static inline void exit_io_context(void)
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