c20b00c6af
3306 zdb should be able to issue reads in parallel illumos/illumos-gate/31d7e8fa33fae995f558673adb22641b5aa8b6e1 https://www.illumos.org/issues/3306 The upstream change was made before we started to import upstream commits individually. It was imported into the illumos vendor area as r242733. That commit was MFV-ed in r260138, but as the commit message says vdev_file.c was left intact. This commit actually implements the parallel I/O for vdev_file using a taskqueue with multiple thread. This implementation does not depend on the illumos or FreeBSD bio interface at all, but uses zio_t to pass around all the relevent data. So, the code looks a bit different from the upstream. This commit also incorporates ZoL commit zfsonlinux/zfs/bc25c9325b0e5ced897b9820dad239539d561ec9 that fixed https://github.com/zfsonlinux/zfs/issues/2270 We need to use a dedicated taskqueue for exactly the same reason as ZoL as we do not implement TASKQ_DYNAMIC. Obtained from: illumos, ZFS on Linux MFC after: 2 weeks |
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