mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-11-18 02:20:59 +03:00
4e1d1b4b92
If the system is very low on memory (specifically, `arc_free_memory() < arc_sys_free/2`, i.e. less than 1/16th of RAM free), `arc_evict_state_impl()` will defer wakups. In this case, the arc_evict_waiter_t's remain on the list, even though `arc_evict_count` has been incremented past their `aew_count`. The problem is that `arc_wait_for_eviction()` assumes that if there are waiters on the list, the count they are waiting for has not yet been reached. However, the deferred wakeups may violate this, causing `ASSERT(last->aew_count > arc_evict_count)` to fail. This commit resolves the issue by having new waiters use the greater of `arc_evict_count` and the last `aew_count`. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: George Wilson <gwilson@delphix.com> Reviewed-by: George Amanakis <gamanakis@gmail.com> Signed-off-by: Matthew Ahrens <mahrens@delphix.com> Closes #11285 Closes #11397 |
||
|---|---|---|
| .. | ||
| avl | ||
| icp | ||
| lua | ||
| nvpair | ||
| os | ||
| spl | ||
| unicode | ||
| zcommon | ||
| zfs | ||
| zstd | ||
| .gitignore | ||
| Kbuild.in | ||
| Makefile.bsd | ||
| Makefile.in | ||