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51e527396b
freebsd-skq/sys
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Xin LI 51e527396b MFV r275549: 
Add a loader tunable, vfs.zfs.arc_meta_min, which controls how much metadata
ZFS should keep in ARC at minimum.

In arc_evict(), when doing recycle, take more factors into account by
applying the following policy:

  1. If no evictable data, evict metadata;
  2. If no evictable metadata, evict data;
  3. If we hit arc_meta_limit, evict metadata;
  4. If we haven't hit arc_meta_min, evict data;
  5* (Illumos only, not present in new FreeBSD code, yet) evict the oldest
     cached element from data and metadata.
     (FreeBSD) evict the data type specified by caller, which is the
     existing behavior.

Note that because of our splitted locks (implemented in r205231 to improve
scalability by reducing lock contention), implementing the fifth Illumos
behavior will not be cheap, so for now just implement the 1-4 and fall back
to current behavior for 5.

Illumos issue:
    5368 ARC should cache more metadata

MFC after:	2 months (assuming we didn't found better solution)
2014-12-15 04:51:36 +00:00
..
amd64 This configuration file removes several debugging options, including 2014-12-02 19:55:43 +00:00
arm Fix the watchdog timeout calculation to prevent wrap. The RPi hardware 2014-12-10 04:54:43 +00:00
boot o Add BERI Virtio Networking Frontend (if_vtbe) 2014-12-09 16:39:21 +00:00
bsm
cam Count consecutive read requests as blocking in CTL for files and ZVOLs. 2014-12-06 20:39:25 +00:00
cddl MFV r275549: 2014-12-15 04:51:36 +00:00
compat The process spin lock currently has the following distinct uses: 2014-11-26 14:10:00 +00:00
conf Move ofw_cpu.c to sys/dev/ofw so that it can be used by other 2014-12-14 22:41:08 +00:00
contrib Correctly define constants. 2014-11-28 04:07:06 +00:00
crypto Add some new modes to OpenCrypto. These modes are AES-ICM (can be used 2014-12-12 19:56:36 +00:00
ddb ddb: ANSI-fy function declarations. 2014-10-12 18:01:52 +00:00
dev Move ofw_cpu.c to sys/dev/ofw so that it can be used by other 2014-12-14 22:41:08 +00:00
fs ext2fs: Fix old out-of-bounds access. 2014-12-09 14:56:00 +00:00
gdb Add support for gdb's memory searching capabilities to our in-kernel gdb 2014-09-05 16:40:47 +00:00
geom Add some new modes to OpenCrypto. These modes are AES-ICM (can be used 2014-12-12 19:56:36 +00:00
gnu reiserfs: Use signed i_nlink 2014-09-25 19:10:32 +00:00
i386 This configuration file removes several debugging options, including 2014-12-02 19:55:43 +00:00
isa
kern Fix gcc build. 2014-12-14 08:43:13 +00:00
kgssapi Avoid dynamic syscall overhead for statically compiled modules. 2014-10-26 19:42:44 +00:00
libkern Add some new modes to OpenCrypto. These modes are AES-ICM (can be used 2014-12-12 19:56:36 +00:00
mips Add some new modes to OpenCrypto. These modes are AES-ICM (can be used 2014-12-12 19:56:36 +00:00
modules Add some new modes to OpenCrypto. These modes are AES-ICM (can be used 2014-12-12 19:56:36 +00:00
net Provide a dead version of if_get_counter. 2014-12-12 16:10:42 +00:00
net80211 Fix multiple incorrect SYSCTL arguments in the kernel: 2014-10-21 07:31:21 +00:00
netgraph In preparation of merging projects/sendfile, transform bare access to 2014-11-12 09:57:15 +00:00
netinet Do not count security policy violation twice. 2014-12-11 19:20:13 +00:00
netinet6 Do not count security policy violation twice. 2014-12-11 19:20:13 +00:00
netipsec Treat errors when retrieving security policy as policy violation. 2014-12-11 18:46:11 +00:00
netnatm
netpfil pf(4) needs to have a correct checksum during its processing. 2014-11-19 13:31:08 +00:00
netsmb
nfs Avoid dynamic syscall overhead for statically compiled modules. 2014-10-26 19:42:44 +00:00
nfsclient Follow up to r225617. In order to maximize the re-usability of kernel code 2014-10-16 18:04:43 +00:00
nfsserver Change NFS readdir() to only ignore cookies preceding the given offset for 2014-07-01 20:00:35 +00:00
nlm Avoid dynamic syscall overhead for statically compiled modules. 2014-10-26 19:42:44 +00:00
ofed Make sure callbacks being freed are not pending when the 2014-12-11 10:47:50 +00:00
opencrypto Add some new modes to OpenCrypto. These modes are AES-ICM (can be used 2014-12-12 19:56:36 +00:00
pc98 This configuration file removes several debugging options, including 2014-12-02 19:55:43 +00:00
powerpc Move ofw_cpu.c to sys/dev/ofw so that it can be used by other 2014-12-14 22:41:08 +00:00
rpc Add facility to stop all userspace processes. The supposed use of the 2014-12-13 16:18:29 +00:00
security Replace dev_clone with cdevpriv(9) KPI in audit_pipe code. 2014-08-20 16:04:30 +00:00
sparc64 This configuration file removes several debugging options, including 2014-12-02 19:55:43 +00:00
sys Add _NEW flag to mtx(9), sx(9), rmlock(9) and rwlock(9). 2014-12-13 21:00:10 +00:00
teken
tools Allow the make_dtb script to work outside of a "make buildkernel" context 2014-08-30 22:39:15 +00:00
ufs Merge from projects/sendfile: 2014-11-23 12:01:52 +00:00
vm Always ignore the deprecated MAP_RENAME and MAP_NORESERVE flags to mmap(). 2014-12-05 15:24:42 +00:00
x86 xen/intr: balance dynamic interrupts across available vCPUs 2014-12-10 13:25:21 +00:00
xdr
xen xen: convert the Grant-table code to a NewBus device 2014-12-10 11:35:41 +00:00
Makefile Remove "pci" from CSCOPEDIRS. 2014-09-23 06:32:19 +00:00