Add a counter to track in-flight AIO requests using unmapped I/O.
MFC after: 2 weeks Sponsored by: Chelsio Communications
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=327752
@ -150,6 +150,11 @@ static int num_buf_aio = 0;
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SYSCTL_INT(_vfs_aio, OID_AUTO, num_buf_aio, CTLFLAG_RD, &num_buf_aio, 0,
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"Number of aio requests presently handled by the buf subsystem");
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static int num_unmapped_aio = 0;
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SYSCTL_INT(_vfs_aio, OID_AUTO, num_unmapped_aio, CTLFLAG_RD, &num_unmapped_aio,
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0,
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"Number of aio requests presently handled by unmapped I/O buffers");
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/* Number of async I/O processes in the process of being started */
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/* XXX This should be local to aio_aqueue() */
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static int num_aio_resv_start = 0;
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@ -1305,6 +1310,7 @@ aio_qphysio(struct proc *p, struct kaiocb *job)
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bp->bio_ma_offset = poff;
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bp->bio_data = unmapped_buf;
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bp->bio_flags |= BIO_UNMAPPED;
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atomic_add_int(&num_unmapped_aio, 1);
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}
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/* Perform transfer. */
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@ -2365,7 +2371,8 @@ aio_physwakeup(struct bio *bp)
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AIO_LOCK(ki);
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ki->kaio_buffer_count--;
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AIO_UNLOCK(ki);
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}
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} else
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atomic_subtract_int(&num_unmapped_aio, 1);
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vm_page_unhold_pages(job->pages, job->npages);
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bp = job->bp;
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