freebsd-nq/lib
Michael Niewöhner 85ce79bbc8 Increase default zcmd allocation to 256K
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
2019-07-30 09:59:38 -07:00
..
libavl Support -fsanitize=address with --enable-asan 2018-01-10 10:49:27 -08:00
libefi Remove libefi __linux__ wrappers 2018-06-14 09:43:32 -07:00
libicp Add support for selecting encryption backend 2018-08-02 11:59:24 -07:00
libnvpair config: better libtirpc detection 2019-03-02 16:19:05 -08:00
libshare Fedora 28: Fix misc bounds check compiler warnings 2018-08-26 12:55:44 -07:00
libspl ZFS Reads may result in unneccesary calls to zil_commit 2019-03-22 13:09:11 -07:00
libtpool Support -fsanitize=address with --enable-asan 2018-01-10 10:49:27 -08:00
libunicode Support -fsanitize=address with --enable-asan 2018-01-10 10:49:27 -08:00
libuutil Update build system and packaging 2018-05-29 16:00:33 -07:00
libzfs Increase default zcmd allocation to 256K 2019-07-30 09:59:38 -07:00
libzfs_core Remove code for zfs remap 2019-06-24 16:44:01 -07:00
libzpool Log Spacemap Project 2019-07-16 10:11:49 -07:00
libzutil Sort by full path name instead of by GUID when importing 2019-02-26 11:13:15 -08:00
Makefile.am Add libzutil for libzfs or libzpool consumers 2018-11-05 11:22:33 -08:00