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adea827b21
freebsd-skq/sys
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Steven Hartland adea827b21 Optimisation of TRIM processing. 
Previously TRIM processing was very bursty. This was made worse by the fact
that TRIM requests on SSD's are typically much slower than reads or writes.
This often resulted in stalls while large numbers of TRIM's where processed.

In addition due to the way the TRIM thread was only woken by writes, deletes
could stall in the queue for extensive periods of time.

This patch adds a number of controls to how often the TRIM thread for each
SPA processes its outstanding delete requests.
vfs.zfs.trim.timeout: Delay TRIMs by up to this many seconds
vfs.zfs.trim.txg_delay: Delay TRIMs by up to this many TXGs (reduced to 32)
vfs.zfs.vdev.trim_max_bytes: Maximum pending TRIM bytes for a vdev
vfs.zfs.vdev.trim_max_pending: Maximum pending TRIM segments for a vdev
vfs.zfs.trim.max_interval: Maximum interval between TRIM queue processing
(seconds)

Given the most common TRIM implementation is ATA TRIM the current defaults
are targeted at that.

Reviewed by:	pjd (mentor)
Approved by:	pjd (mentor)
MFC after:	2 weeks
2013-03-21 11:02:08 +00:00
..
amd64 Implement the concept of the unmapped VMIO buffers, i.e. buffers which 2013-03-19 14:13:12 +00:00
arm Integrate Efika MX project back to home. 2013-03-20 15:39:27 +00:00
boot Integrate Efika MX project back to home. 2013-03-20 15:39:27 +00:00
bsm - Implement two new system calls: 2013-03-02 21:11:30 +00:00
cam Commit the removal of a whitespace to record the proper commit message 2013-03-19 15:05:21 +00:00
cddl Optimisation of TRIM processing. 2013-03-21 11:02:08 +00:00
compat Use m_get/m_gethdr instead of compat macros. 2013-03-15 12:55:30 +00:00
conf Sync back vmcontention branch into HEAD: 2013-03-18 00:25:02 +00:00
contrib Simplify TAILQ usage and avoid additional memory allocations. 2013-03-05 08:08:16 +00:00
crypto When porting XTS-related code from OpenBSD I forgot to update copyright (only 2013-02-20 22:59:53 +00:00
ddb Small textdump enhancements. 2012-11-01 04:07:08 +00:00
dev Add new USB ID. 2013-03-21 07:04:17 +00:00
fs Do not call vnode_pager_setsize() while a NFS node mutex is 2013-03-21 07:25:08 +00:00
gdb
geom Assert that transient mapping of the bio is only done when unmapped 2013-03-21 07:26:33 +00:00
gnu/fs/reiserfs Garbage collect XFS bits which are now already completely disconnected 2013-03-02 15:33:54 +00:00
i386 Implement the concept of the unmapped VMIO buffers, i.e. buffers which 2013-03-19 14:13:12 +00:00
ia64 Implement the concept of the unmapped VMIO buffers, i.e. buffers which 2013-03-19 14:13:12 +00:00
isa
kern Only size and create the bio_transient_map when unmapped buffers are 2013-03-21 07:28:15 +00:00
kgssapi Piete.Brooks at cl.cam.ac.uk reported via email a crash which was 2012-12-18 00:25:48 +00:00
libkern Add __aeabi_memset to libkern, implemented using memset, as clang may 2013-03-16 23:11:55 +00:00
mips Implement the concept of the unmapped VMIO buffers, i.e. buffers which 2013-03-19 14:13:12 +00:00
modules Fix the powerpc64 build. MACHINE_CPUARCH is common for powerpc/powerpc64, 2013-03-19 00:39:02 +00:00
net Fix style and comments. 2013-03-19 05:51:47 +00:00
net80211 Add VNET wrappers around the rest of the ieee80211 rtsock messages. 2013-03-20 02:42:52 +00:00
netatalk Mechanically substitute flags from historic mbuf allocator with 2012-12-05 08:04:20 +00:00
netgraph Add NGM_NAT_LIBALIAS_INFO command, that reports internal stats 2013-03-21 08:36:15 +00:00
netinet Add ipfw support for setting/matching DiffServ codepoints (DSCP). 2013-03-20 10:35:33 +00:00
netinet6 - Use m_getcl() instead of hand allocating. 2013-03-15 13:48:53 +00:00
netipsec Use m_get2() + m_align() instead of hand made key_alloc_mbuf(). Code 2013-03-15 10:20:15 +00:00
netipx Mechanically substitute flags from historic mbuf allocator with 2012-12-05 08:04:20 +00:00
netnatm Mechanically substitute flags from historic mbuf allocator with 2012-12-05 08:04:20 +00:00
netpfil Add ipfw support for setting/matching DiffServ codepoints (DSCP). 2013-03-20 10:35:33 +00:00
netsmb Call make_dev_credf() rather than using the couple make_dev()/dev_ref(). 2013-03-09 16:58:19 +00:00
nfs Use m_get() and m_getcl() instead of compat macros. 2013-03-15 10:21:18 +00:00
nfsclient Fix remainder calculation when biosize is not a power of 2 2013-03-19 13:06:11 +00:00
nfsserver Switch the vm_object mutex to be a rwlock. This will enable in the 2013-03-09 02:32:23 +00:00
nlm Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
ofed Switch the vm_object mutex to be a rwlock. This will enable in the 2013-03-09 02:32:23 +00:00
opencrypto When porting XTS-related code from OpenBSD I forgot to update copyright (only 2013-02-20 22:59:53 +00:00
pc98 Switch the vm_object mutex to be a rwlock. This will enable in the 2013-03-09 02:32:23 +00:00
pci Fix build. 2013-02-21 12:52:18 +00:00
powerpc Implement the concept of the unmapped VMIO buffers, i.e. buffers which 2013-03-19 14:13:12 +00:00
rpc Revert 195703 and 195821 as this special stop handling in NFS is now 2013-03-13 21:06:03 +00:00
security Switch the vm_object mutex to be a rwlock. This will enable in the 2013-03-09 02:32:23 +00:00
sparc64 Implement the concept of the unmapped VMIO buffers, i.e. buffers which 2013-03-19 14:13:12 +00:00
sys When renaming a directory from one parent directory to another, 2013-03-20 17:57:00 +00:00
teken
tools Further refine the handling of stop signals in the NFS client. The 2013-02-21 19:02:50 +00:00
ufs When renaming a directory from one parent directory to another, 2013-03-20 17:57:00 +00:00
vm Only size and create the bio_transient_map when unmapped buffers are 2013-03-21 07:28:15 +00:00
x86 MFcalloutng: 2013-02-28 13:46:03 +00:00
xdr Use m_get() and m_getcl() instead of compat macros. 2013-03-15 10:21:18 +00:00
xen Move the corresponding MTX_SYSINIT() next to their struct mtx declaration 2012-10-26 17:31:35 +00:00
Makefile Remove netncp cscope entry missed in r248097 2013-03-12 14:21:52 +00:00