Qi Wang
deb8e62a83
Implement guard pages.
...
Adding guarded extents, which are regular extents surrounded by guard pages
(mprotected). To reduce syscalls, small guarded extents are cached as a
separate eset in ecache, and decay through the dirty / muzzy / retained pipeline
as usual.
2021-09-26 16:30:15 -07:00
Qi Wang
8b24cb8fdf
Don't assume initialized arena in the default alloc hook.
...
Specifically, this change allows the default alloc hook to used during
arenas.create. One use case is to invoke the default alloc hook in a customized
hook arena, i.e. the default hooks can be read out of a default arena, then
create customized ones based on these hooks. Note that mixing the default with
customized hooks is not recommended, and should only be considered when the
customization is simple and straightforward.
2021-08-25 14:19:25 -07:00
Qi Wang
3093d9455e
Move the edata mergeability related functions to extent.h.
2021-03-29 17:19:53 -07:00
Qi Wang
add636596a
Stop checking head state in the merge hook.
...
Now that all merging go through try_acquire_edata_neighbor, the mergeablility
checks (including head state checking) are done before reaching the merge hook.
In other words, merge hook will never be called if the head state doesn't agree.
2021-03-29 17:19:53 -07:00
Qi Wang
70d1541c5b
Track extent is_head state in rtree leaf.
2021-03-29 17:19:53 -07:00
David Goldblatt
a4759a1911
Ehooks: avoid touching arena_emap_global in tests.
...
That breaks our ability to test custom emaps in isolation.
2020-04-10 13:12:47 -07:00
David Goldblatt
294b276fc7
PA: Parameterize emap. Move emap_global to arena.
...
This lets us test the PA module without interfering with the global emap used by
the real allocator (the one not under test).
2020-04-10 13:12:47 -07:00
David Goldblatt
7e6c8a7286
Emap: Standardize naming.
...
Namespace everything under emap_, always specify what it is we're looking up
(emap_lookup -> emap_edata_lookup), and use "ctx" over "info".
2020-02-17 10:50:51 -08:00
David Goldblatt
9b5d105fc3
Emap: Move in iealloc.
...
This is logically scoped to the emap.
2020-02-17 10:50:51 -08:00
Qi Wang
ca1f082251
Disallow merge across mmap regions to preserve SN / first-fit.
...
Check the is_head state before merging two extents. Disallow the merge if it's
crossing two separate mmap regions. This enforces first-fit (by not losing the
SN) at a very small cost.
2020-02-13 12:18:44 -08:00
Qi Wang
a5d3dd4059
Fix an assertion on extent head state with dss.
2020-01-10 13:29:14 -08:00
David Goldblatt
6342da0970
Ehooks: Further optimize default merge case.
...
This avoids the cost of an iealloc in cases where the user uses the default
merge hook without using the default extent hooks.
2019-12-20 10:18:40 -08:00
David Goldblatt
f2f2084e79
Ehooks: Assert alloc isn't NULL
2019-12-20 10:18:40 -08:00
David Goldblatt
57fe99d4be
Move relevant index into the ehooks_t itself.
...
It's always passed into the ehooks; keeping it colocated lets us avoid passing
the arena everywhere.
2019-12-20 10:18:40 -08:00
David Goldblatt
0704516245
Ehooks: Add head tracking.
2019-12-20 10:18:40 -08:00
David Goldblatt
a7862df616
Rename extent_t to edata_t.
...
This frees us up from the unfortunate extent/extent2 naming collision.
2019-12-20 10:18:40 -08:00
David Goldblatt
4b2e5ee8b9
Ehooks: Add a "zero" ehook.
...
This is the first API expansion. It lets the hooks pick where and how to purge
within themselves.
2019-12-20 10:18:40 -08:00
David Goldblatt
39fdc690a0
Ehooks comments and cleanup.
2019-12-20 10:18:40 -08:00
David Goldblatt
c8dae890c8
Extent -> Ehooks: Move over default hooks.
2019-12-20 10:18:40 -08:00
David Goldblatt
2fe5108263
Extent -> Ehooks: Move merge hook.
2019-12-20 10:18:40 -08:00
David Goldblatt
1fff4d2ee3
Extent -> Ehooks: Move split hook.
2019-12-20 10:18:40 -08:00
David Goldblatt
a5b42a1a10
Extent -> Ehooks: Move purge_forced hook.
2019-12-20 10:18:40 -08:00
David Goldblatt
368baa42ef
Extent -> Ehooks: Move purge_lazy hook.
2019-12-20 10:18:40 -08:00
David Goldblatt
d78fe241ac
Extent -> Ehooks: Move commit and decommit hooks.
2019-12-20 10:18:40 -08:00
David Goldblatt
5459ec9dae
Extent -> Ehooks: Move destroy hook.
2019-12-20 10:18:40 -08:00
David Goldblatt
bac8e2e5a6
Extent -> Ehooks: Move dalloc hook.
2019-12-20 10:18:40 -08:00
David Goldblatt
dc8b4e6e13
Extent -> Ehooks: Move alloc hook.
2019-12-20 10:18:40 -08:00
David Goldblatt
ae0d8e8591
Move extent ehook calls into ehooks
2019-12-20 10:18:40 -08:00
David Goldblatt
ba8b9ecbcb
Add ehooks module
2019-12-20 10:18:40 -08:00
