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6d1599c1e1
When creating hundreds of clones (for example using containers with LXD) cloning slows down as the number of clones increases over time. The reason for this is that the fetching of the clone information using a small zcmd buffer requires two ioctl calls, one to determine the size and a second to return the data. However, this requires gathering the data twice, once to determine the size and again to populate the zcmd buffer to return it to userspace. These are expensive ioctl() calls, so instead, make the default buffer size much larger: 256K. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: George Melikov <mail@gmelikov.ru> Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Michael Niewöhner <foss@mniewoehner.de> Closes #9084 |
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| .. | ||
| .gitignore | ||
| libzfs_changelist.c | ||
| libzfs_config.c | ||
| libzfs_core.pc.in | ||
| libzfs_crypto.c | ||
| libzfs_dataset.c | ||
| libzfs_diff.c | ||
| libzfs_import.c | ||
| libzfs_iter.c | ||
| libzfs_mount.c | ||
| libzfs_pool.c | ||
| libzfs_sendrecv.c | ||
| libzfs_status.c | ||
| libzfs_util.c | ||
| libzfs.pc.in | ||
| Makefile.am | ||
| THIRDPARTYLICENSE.openssl | ||
| THIRDPARTYLICENSE.openssl.descrip | ||