Date: Tue, 9 Jan 2018 23:57:29 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r327752 - head/sys/kern Message-ID: <201801092357.w09NvTFO075279@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: jhb Date: Tue Jan 9 23:57:29 2018 New Revision: 327752 URL: https://svnweb.freebsd.org/changeset/base/327752 Log: Add a counter to track in-flight AIO requests using unmapped I/O. MFC after: 2 weeks Sponsored by: Chelsio Communications Modified: head/sys/kern/vfs_aio.c Modified: head/sys/kern/vfs_aio.c ============================================================================== --- head/sys/kern/vfs_aio.c Tue Jan 9 22:48:13 2018 (r327751) +++ head/sys/kern/vfs_aio.c Tue Jan 9 23:57:29 2018 (r327752) @@ -150,6 +150,11 @@ static int num_buf_aio = 0; SYSCTL_INT(_vfs_aio, OID_AUTO, num_buf_aio, CTLFLAG_RD, &num_buf_aio, 0, "Number of aio requests presently handled by the buf subsystem"); +static int num_unmapped_aio = 0; +SYSCTL_INT(_vfs_aio, OID_AUTO, num_unmapped_aio, CTLFLAG_RD, &num_unmapped_aio, + 0, + "Number of aio requests presently handled by unmapped I/O buffers"); + /* Number of async I/O processes in the process of being started */ /* XXX This should be local to aio_aqueue() */ static int num_aio_resv_start = 0; @@ -1305,6 +1310,7 @@ aio_qphysio(struct proc *p, struct kaiocb *job) bp->bio_ma_offset = poff; bp->bio_data = unmapped_buf; bp->bio_flags |= BIO_UNMAPPED; + atomic_add_int(&num_unmapped_aio, 1); } /* Perform transfer. */ @@ -2365,7 +2371,8 @@ aio_physwakeup(struct bio *bp) AIO_LOCK(ki); ki->kaio_buffer_count--; AIO_UNLOCK(ki); - } + } else + atomic_subtract_int(&num_unmapped_aio, 1); vm_page_unhold_pages(job->pages, job->npages); bp = job->bp;
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201801092357.w09NvTFO075279>