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f270658873
freebsd-dev/sys
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Thomas Munro f270658873 vfs: track sequential reads and writes separately 
For software like PostgreSQL and SQLite that sometimes reads sequentially
while also writing sequentially some distance behind with interleaved
syscalls on the same fd, performance is better on UFS if we do
sequential access heuristics separately for reads and writes.

Patch originally by Andrew Gierth in 2008, updated and proposed by me with
his permission.

Reviewed by:	mjg, kib, tmunro
Approved by:	mjg (mentor)
Obtained from:	Andrew Gierth <andrew@tao11.riddles.org.uk>
Differential Revision:	https://reviews.freebsd.org/D25024
2020-06-21 08:51:24 +00:00
..
amd64 [PowerPC] More relocation fixes 2020-06-21 03:39:26 +00:00
arm [PowerPC] More relocation fixes 2020-06-21 03:39:26 +00:00
arm64 [PowerPC] More relocation fixes 2020-06-21 03:39:26 +00:00
bsm bsm: add AUE_CLOSERANGE 2020-04-24 01:27:25 +00:00
cam Use the more descriptive src_ccb and dst_ccb for the two ccbs being merged. 2020-06-20 04:07:23 +00:00
cddl loader: create single zfs nextboot implementation 2020-06-20 06:23:31 +00:00
compat vfs: track sequential reads and writes separately 2020-06-21 08:51:24 +00:00
conf Add specialized gpio driver for ARMADA 8k SoC. 2020-06-19 15:21:33 +00:00
contrib Document upgrade procedure in FREEBSD-upgrade 2020-06-04 20:48:57 +00:00
crypto Fix AES-CCM requests with an AAD size smaller than a single block. 2020-06-12 21:33:02 +00:00
ddb [PowerPC] More relocation fixes 2020-06-21 03:39:26 +00:00
dev [PowerPC] More relocation fixes 2020-06-21 03:39:26 +00:00
dts Remove licenses 2020-06-04 17:20:58 +00:00
fs vfs: track sequential reads and writes separately 2020-06-21 08:51:24 +00:00
gdb Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
geom Move the pointers stored in the superblock into a separate 2020-06-19 01:02:53 +00:00
gnu dts: patch the am33xx dts for upcoming clock support 2020-06-05 20:14:54 +00:00
i386 [PowerPC] More relocation fixes 2020-06-21 03:39:26 +00:00
isa sc(4) md bits: stop setting sc->kbd entirely 2019-12-30 02:07:55 +00:00
kern vfs: track sequential reads and writes separately 2020-06-21 08:51:24 +00:00
kgssapi Add support for optional separate output buffers to in-kernel crypto. 2020-05-25 22:12:04 +00:00
libkern libkern: Add arc4random_uniform 2020-05-23 17:51:06 +00:00
mips [PowerPC] More relocation fixes 2020-06-21 03:39:26 +00:00
modules Add DTB files for ARMADA 8040 based boards. 2020-06-19 14:28:56 +00:00
net iflib: netmap: enter/exit netmap mode after device stops 2020-06-14 21:07:12 +00:00
net80211 [net80211] Add missing commit to previous-1 uapsd commit. 2020-06-16 00:28:45 +00:00
netgraph Update event masks constant to Bluetooth core spec V5.2 2020-06-15 14:58:40 +00:00
netinet Set a variable also in the case of an INET6 only kernel 2020-06-20 23:48:57 +00:00
netinet6 Add the SCTP_SUPPORT kernel option. 2020-06-18 19:32:34 +00:00
netipsec Add the SCTP_SUPPORT kernel option. 2020-06-18 19:32:34 +00:00
netpfil Add the SCTP_SUPPORT kernel option. 2020-06-18 19:32:34 +00:00
netsmb Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
nfs Use epoch(9) for rtentries to simplify control plane operations. 2020-05-23 10:21:02 +00:00
nfsclient
nfsserver
nlm Fix export_args ex_flags field so that is 64bits, the same as mnt_flags. 2020-06-14 00:10:18 +00:00
ofed Convert OFED rtable interactions to the new routing KPI. 2020-04-15 13:06:55 +00:00
opencrypto Various optimizations to software AES-CCM and AES-GCM. 2020-06-12 23:10:30 +00:00
powerpc [PowerPC] More relocation fixes 2020-06-21 03:39:26 +00:00
riscv riscv: Use SBI shutdown call to implement RB_POWEROFF 2020-06-08 17:57:21 +00:00
rpc Fix up a comment added by r362455. 2020-06-21 02:49:56 +00:00
security mac_veriexec_fingerprint_check_vnode: v_writecount > 0 means active writers 2020-06-12 21:51:20 +00:00
sys vfs: track sequential reads and writes separately 2020-06-21 08:51:24 +00:00
teken
tests Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
tools vfs: stop null checking routines in vop wrappers 2020-01-26 00:41:38 +00:00
ufs The binary representation of the superblock (the fs structure) is written 2020-06-19 01:04:25 +00:00
vm Clarify some language. Favor primary where both master and primary were 2020-06-20 20:21:04 +00:00
x86 Control for Special Register Buffer Data Sampling mitigation. 2020-06-12 22:14:45 +00:00
xdr Split XDR into separate kernel module. Make krpc depend on xdr. 2020-04-17 06:04:20 +00:00
xen Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (16 of many) 2020-02-25 19:04:39 +00:00
Makefile Remove sparc64 kernel support 2020-02-03 17:35:11 +00:00