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3e7e19e028
In "all pools" mode, pool_iter_refresh() will call zpool_iter(), which will call zpool_refresh_stats() before calling add_pool(). If we already have the pool, this is a different handle, so we just release it and return. Back in pool_iter_refresh(), we then call zpool_stats_refresh() again for our handle on the same pool. All together, this means we're doing two ZFS_IOC_POOL_STATS calls into the kernel for every pool in the system. This isn't wrong, but it does double the pressure on global locks. Instead, we add a new function zpool_refresh_stats_from_handle() that simply copies the pool config and state from one handle to another, and use it to update our handle before we release it in add_pool(), so we only have one call per pool per interval. Sponsored-by: Klara, Inc. Sponsored-by: Wasabi Technology, Inc. Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Rob Norris <rob.norris@klarasystems.com> Closes #17807 |
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| .. | ||
| os | ||
| sys | ||
| .gitignore | ||
| cityhash.h | ||
| libnvpair.h | ||
| libuutil_common.h | ||
| libuutil_impl.h | ||
| libuutil.h | ||
| libzdb.h | ||
| libzfs_core.h | ||
| libzfs.h | ||
| libzfsbootenv.h | ||
| libzutil.h | ||
| Makefile.am | ||
| thread_pool.h | ||
| zfeature_common.h | ||
| zfs_comutil.h | ||
| zfs_crrd.h | ||
| zfs_deleg.h | ||
| zfs_fletcher.h | ||
| zfs_namecheck.h | ||
| zfs_prop.h | ||
| zfs_valstr.h | ||