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mirror of https://github.com/edk2-porting/linux-next.git synced 2025-01-06 20:53:54 +08:00
linux-next/include
Dongmao Zhang 5066a4df1f dm log userspace: allow mark requests to piggyback on flush requests
In the cluster evironment, cluster write has poor performance because
userspace_flush() has to contact a userspace program (cmirrord) for
clear/mark/flush requests.  But both mark and flush requests require
cmirrord to communicate the message to all the cluster nodes for each
flush call.  This behaviour is really slow.

To address this we now merge mark and flush requests together to reduce
the kernel-userspace-kernel time.  We allow a new directive,
"integrated_flush" that can be used to instruct the kernel log code to
combine flush and mark requests when directed by userspace.  If not
directed by userspace (due to an older version of the userspace code
perhaps), the kernel will function as it did previously - preserving
backwards compatibility.  Additionally, flush requests are performed
lazily when only clear requests exist.

Signed-off-by: Dongmao Zhang <dmzhang@suse.com>
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2014-01-21 23:46:27 -05:00
..
acpi Merge branch 'acpica' 2013-11-27 01:03:27 +01:00
asm-generic word-at-a-time: provide generic big-endian zero_bytemask implementation 2013-12-12 10:39:01 -08:00
clocksource
crypto crypto: scatterwalk - Use sg_chain_ptr on chain entries 2013-12-09 19:58:52 +08:00
drm Merge branch 'ttm-fixes-3.13' of git://people.freedesktop.org/~thomash/linux into drm-fixes 2013-11-21 18:46:56 +10:00
dt-bindings For the 3.13 merge window we have a couple of new drivers for the AMS 2013-11-15 16:37:40 -08:00
keys
kvm
linux Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-12-15 11:56:47 -08:00
math-emu
media [media] videobuf2: Add support for file access mode flags for DMABUF exporting 2013-12-09 14:50:50 -02:00
memory
misc
net sctp: properly latch and use autoclose value from sock to association 2013-12-10 22:41:26 -05:00
pcmcia
ras
rdma Merge branches 'cma', 'cxgb4', 'flowsteer', 'ipoib', 'misc', 'mlx4', 'mlx5', 'nes', 'ocrdma', 'qib' and 'srp' into for-next 2013-11-17 08:22:19 -08:00
rxrpc
scsi [SCSI] Disable WRITE SAME for RAID and virtual host adapter drivers 2013-11-29 08:48:39 +04:00
sound ALSA: memalloc.h - fix wrong truncation of dma_addr_t 2013-12-10 15:30:46 +01:00
target target_core_alua: Store supported ALUA states 2013-11-20 11:26:37 -08:00
trace Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-12-02 10:13:09 -08:00
uapi dm log userspace: allow mark requests to piggyback on flush requests 2014-01-21 23:46:27 -05:00
video fbdev changes for 3.13 2013-11-14 14:44:20 +09:00
xen Features: 2013-11-15 13:34:37 +09:00
Kbuild