d5b4a21b3d
There is no real limit for task sizes in the iblock driver given that we can chain bios. Increase the maximum size to UINT_MAX, and change the code to submit bios in a smaller batch size to avoid deadlocks when having more bios in flight than the pool supports. Also increase the pool size to always allow multiple tasks to be in flight. I also had to change the task refcounting to include one reference for the submission task, which is a standard practice in this kind of code in Linux (e.g. XFS I/O submission). This was wrong before, but couldn't be hit easily. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
24 lines
500 B
C
24 lines
500 B
C
#ifndef TARGET_CORE_IBLOCK_H
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#define TARGET_CORE_IBLOCK_H
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#define IBLOCK_VERSION "4.0"
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#define IBLOCK_MAX_CDBS 16
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#define IBLOCK_LBA_SHIFT 9
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struct iblock_req {
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struct se_task ib_task;
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atomic_t pending;
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atomic_t ib_bio_err_cnt;
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} ____cacheline_aligned;
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#define IBDF_HAS_UDEV_PATH 0x01
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struct iblock_dev {
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unsigned char ibd_udev_path[SE_UDEV_PATH_LEN];
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u32 ibd_flags;
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struct bio_set *ibd_bio_set;
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struct block_device *ibd_bd;
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} ____cacheline_aligned;
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#endif /* TARGET_CORE_IBLOCK_H */
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