diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-11-26 12:58:14 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-11-29 14:41:29 +0100 |
| commit | 8ffc13680eac16a1eec86275b65fc6f0e27a30d8 (patch) | |
| tree | db16d6b30b907c381f0288e57016abbbfebdeb29 /block/blk-ioc.c | |
| parent | block: factor out a alloc_io_context helper (diff) | |
| download | linux-8ffc13680eac16a1eec86275b65fc6f0e27a30d8.tar.xz linux-8ffc13680eac16a1eec86275b65fc6f0e27a30d8.zip | |
block: use alloc_io_context in __copy_io
In __copy_io we know that the newly allocate task_struct does not have
an I/O context yet and is not exiting. So just allocate the I/O context
struct and install it directly. There is no need to lock the task
either as it is just being created.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211126115817.2087431-12-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-ioc.c')
| -rw-r--r-- | block/blk-ioc.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/block/blk-ioc.c b/block/blk-ioc.c index b42fbb82d5c0..f06d1040442c 100644 --- a/block/blk-ioc.c +++ b/block/blk-ioc.c @@ -336,7 +336,6 @@ struct io_context *get_task_io_context(struct task_struct *task, int __copy_io(unsigned long clone_flags, struct task_struct *tsk) { struct io_context *ioc = current->io_context; - struct io_context *new_ioc; /* * Share io context with parent, if CLONE_IO is set @@ -347,12 +346,10 @@ int __copy_io(unsigned long clone_flags, struct task_struct *tsk) atomic_inc(&ioc->nr_tasks); tsk->io_context = ioc; } else if (ioprio_valid(ioc->ioprio)) { - new_ioc = get_task_io_context(tsk, GFP_KERNEL, NUMA_NO_NODE); - if (unlikely(!new_ioc)) + tsk->io_context = alloc_io_context(GFP_KERNEL, NUMA_NO_NODE); + if (!tsk->io_context) return -ENOMEM; - - new_ioc->ioprio = ioc->ioprio; - put_io_context(new_ioc); + tsk->io_context->ioprio = ioc->ioprio; } return 0; |