- 09 Sep, 2005 40 commits
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Dipankar Sarma authored
Add documentation describing the new locking scheme for file descriptor table. Signed-off-by:
Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Dipankar Sarma authored
With the use of RCU in files structure, the look-up of files using fds can now be lock-free. The lookup is protected by rcu_read_lock()/rcu_read_unlock(). This patch changes the readers to use lock-free lookup. Signed-off-by:
Maneesh Soni <maneesh@in.ibm.com> Signed-off-by:
Ravikiran Thirumalai <kiran_th@gmail.com> Signed-off-by:
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Dipankar Sarma authored
Patch to eliminate struct files_struct.file_lock spinlock on the reader side and use rcu refcounting rcuref_xxx api for the f_count refcounter. The updates to the fdtable are done by allocating a new fdtable structure and setting files->fdt to point to the new structure. The fdtable structure is protected by RCU thereby allowing lock-free lookup. For fd arrays/sets that are vmalloced, we use keventd to free them since RCU callbacks can't sleep. A global list of fdtable to be freed is not scalable, so we use a per-cpu list. If keventd is already handling the current cpu's work, we use a timer to defer queueing of that work. Since the last publication, this patch has been re-written to avoid using explicit memory barriers and use rcu_assign_pointer(), rcu_dereference() premitives instead. This required that the fd information is kept in a separate structure (fdtable) and updated atomically. Signed-off-by:
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Dipankar Sarma authored
Fix sparc64 timod to use the new files_fdtable() api to get the fd table. This is necessary for RCUification. Signed-off-by:
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Dipankar Sarma authored
In order for the RCU to work, the file table array, sets and their sizes must be updated atomically. Instead of ensuring this through too many memory barriers, we put the arrays and their sizes in a separate structure. This patch takes the first step of putting the file table elements in a separate structure fdtable that is embedded withing files_struct. It also changes all the users to refer to the file table using files_fdtable() macro. Subsequent applciation of RCU becomes easier after this. Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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Dipankar Sarma authored
Adds a set of primitives to do reference counting for objects that are looked up without locks using RCU. Signed-off-by:
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Dipankar Sarma authored
First of a number of files_lock scaability patches. Here are the x86 numbers - tiobench on a 4(8)-way (HT) P4 system on ramdisk : (lockfree) Test 2.6.10-vanilla Stdev 2.6.10-fd Stdev ------------------------------------------------------------- Seqread 1400.8 11.52 1465.4 34.27 Randread 1594 8.86 2397.2 29.21 Seqwrite 242.72 3.47 238.46 6.53 Randwrite 445.74 9.15 446.4 9.75 The performance improvement is very significant. We are getting killed by the cacheline bouncing of the files_struct lock here. Writes on ramdisk (ext2) seems to vary just too much to get any meaningful number. Also, With Tridge's thread_perf test on a 4(8)-way (HT) P4 xeon system : 2.6.12-rc5-vanilla : Running test 'readwrite' with 8 tasks Threads 0.34 +/- 0.01 seconds Processes 0.16 +/- 0.00 seconds 2.6.12-rc5-fd : Running test 'readwrite' with 8 tasks Threads 0.17 +/- 0.02 seconds Processes 0.17 +/- 0.02 seconds I repeated the measurements on ramfs (as opposed to ext2 on ramdisk in the earlier measurement) and I got more consistent results from tiobench : 4(8) way xeon P4 ----------------- (lock-free) Test 2.6.12-rc5 Stdev 2.6.12-rc5-fd Stdev ------------------------------------------------------------- Seqread 1282 18.59 1343.6 26.37 Randread 1517 7 2415 34.27 Seqwrite 702.2 5.27 709.46 5.9 Randwrite 846.86 15.15 919.68 21.4 4-way ppc64 ------------ (lock-free) Test 2.6.12-rc5 Stdev 2.6.12-rc5-fd Stdev ------------------------------------------------------------- Seqread 1549 91.16 1569.6 47.2 Randread 1473.6 25.11 1585.4 69.99 Seqwrite 1096.8 20.03 1136 29.61 Randwrite 1189.6 4.04 1275.2 32.96 Also running Tridge's thread_perf test on ppc64 : 2.6.12-rc5-vanilla -------------------- Running test 'readwrite' with 4 tasks Threads 0.20 +/- 0.02 seconds Processes 0.16 +/- 0.01 seconds 2.6.12-rc5-fd -------------------- Running test 'readwrite' with 4 tasks Threads 0.18 +/- 0.04 seconds Processes 0.16 +/- 0.01 seconds The benefits are huge (upto ~60%) in some cases on x86 primarily due to the atomic operations during acquisition of ->file_lock and cache line bouncing in fast path. ppc64 benefits are modest due to LL/SC based locking, but still statistically significant. This patch: RCU head initilizer no longer needs the head varible name since we don't use list.h lists anymore. Signed-off-by: -
Mauro Carvalho Chehab authored
- tveeprom improved and updated to reflect newer Hauppage cards. - CodingStyle fixes. Signed-off-by:
Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by:
Mauro Carvalho Chehab <mchehab@brturbo.com.br> Signed-off-by:
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Mauro Carvalho Chehab authored
- adds the adapter number + i2c address to printk msgs. - Some CodingStyle cleanups. Signed-off-by:
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Mauro Carvalho Chehab authored
- Removed kernel version dependency from tea575x-tuner.h Signed-off-by:
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Mauro Carvalho Chehab authored
- Include saa6588 compiler option and files. - Fix comment on tuner.h - linux/utsname.h replaced by linux/version.h to compile on vanilla 2.6.13 Signed-off-by:
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Mauro Carvalho Chehab authored
- Makes the input event device created by the V4L drivers for the infrared remote matchable by udev rules. Signed-off-by:
Rudo Thomas <rudo@matfyz.cz> Signed-off-by:
Michael Fair <michael@daclubhouse.net> Signed-off-by:
Michael Krufky <mkrufky@m1k.net> Signed-off-by:
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Mauro Carvalho Chehab authored
- added some missing parameter descriptions at msp3400.c Signed-off-by:
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Mauro Carvalho Chehab authored
- print warning if pal= or secam= argument is unrecognized Signed-off-by:
Philip Rowlands <phr@doc.ic.ac.uk> Signed-off-by:
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Mauro Carvalho Chehab authored
- correct the amux for composite and s-video inputs on the Sabrent SBT-TVFM card. Signed-off-by:
Michael Rodriquez-Torrent <mike@themikecam.com> Signed-off-by:
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Mauro Carvalho Chehab authored
- #include <linux/config.h> no longer needed. Signed-off-by:
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Mauro Carvalho Chehab authored
- The Microtune 4049FM5 uses an IF frequency of 33.3 MHz for FM radio. Signed-off-by:
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Mauro Carvalho Chehab authored
- Some error treatment implemented at resume functions. Signed-off-by:
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Mauro Carvalho Chehab authored
- Change LG TDVS H062F from NTSC to ATSC. Signed-off-by:
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Mauro Carvalho Chehab authored
- normalize whitespace and comments in tuner lists Signed-off-by:
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Mauro Carvalho Chehab authored
- cx88-dvb has been incorrectly reporting the card name instead of frontend name - Removes a bad PCI subsystem ID for saa713x Sabrent card - Renames DVICO --> DViCO for bttv. - #include <linux/config.h> no longer needed. Signed-off-by:
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Mauro Carvalho Chehab authored
- Add saa713x card #66: Yuan TUN-900 (saa7135) Signed-off-by:
De Greef Sebastien <sebdg@hotmail.com> Signed-off-by:
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Mauro Carvalho Chehab authored
- Add saa713x card #65 Kworld V-Stream Studio TV Terminator Signed-off-by:
James R Webb <jrwebb@qwest.net> Signed-off-by:
Peter Missel <peter.missel@onlinehome.de> Signed-off-by:
Nickolay V. Shmyrev <nshmyrev@yandex.ru> Signed-off-by:
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Mauro Carvalho Chehab authored
- correct LG NTSC TALN mini tuner takeover as far we can empirically determine for now. Signed-off-by:
Hermann Pitton <hermann.pitton@onlinehome.de> Signed-off-by:
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Mauro Carvalho Chehab authored
- Syncs tveeprom tuners list with the list from ivtv. - Fixes the incorrect reporting of the radio presence. Signed-off-by:
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Mauro Carvalho Chehab authored
- Changes the prefix to 'msp34xx' instead of 'msp3400'. - Changes the message 'error while reading chip version' to a debug printk at msp3400.c Signed-off-by:
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Mauro Carvalho Chehab authored
- Remove $Id CVS logs for V4L files - linux/version.h replaced by linux/utsname.h - Add new Digimatrix card and LG TAPC Mini tuner for it Signed-off-by:
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Mauro Carvalho Chehab authored
- Remove $Id CVS logs for V4L files - add ioctl indirection via cx88_ioctl_hook and cx88_ioctl_translator to cx88-blackbird.c. - declare the indirection hooks from cx88-blackbird.c. - dcprintk macro which uses core instead of dev->core on cx88-video.c. - replace dev->core occurances with core on cx88-video.c. - CodingStyle fixes. - MaxInput replaced by a define. - cx8801 structures moved from cx88.h. - The output_mode needs to be set for the Hauppauge Nova-T DVB-T for versions after 2.6.12. - Corrected GPIO values for cx88 cards #28 & #31 for s-video and composite. - Updated DViCO FusionHDTV5 Gold & added DVB support. - Fixed DViCO FusionHDTV 3 Gold-Q GPIO. - Some clean up in cx88-tvaudio.c - replaced hex values when writing to AUD_CTL to EN_xx for better reading. - Allow select by hand between Mono, Lang1, Lang2 and Stereo for BTSC. - Support for stereo NICAM and BTSC improved. - Broken stereo check removed. - Added support for remote control to Cinergy DVBT-1400. - local var renamed from rc5 to a better name (ircode). - LGDT330X QAM lock bug fixes. - Some reorg: move some bits to struct cx88_core, factor out common ioctl's to cx88_do_ioctl. - Get rid of '//' comments, replace them with #if 0 and /**/. - Minor clean-ups: remove dcprintk and replace all instances of "dev->core" with "core". - Added some registers to control PCI controller at CX2388x chips. - New tuner standby API. - Small mpeg fixes and cleanups for blackbird. - fix mpeg packet size & count - add VIDIOC_QUERYCAP ioctl for the mpeg stream - return more information in struct v4l2_format - fix default window height - small cleanups Signed-off-by:
Uli Luckas <luckas@musoft.de> Signed-off-by:
Torsten Seeboth <Torsten.Seeboth@t-online.de> Signed-off-by:
Patrick Boettcher <patrick.boettcher@desy.de> Signed-off-by:
Catalin Climov <catalin@climov.com> Signed-off-by:
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Mauro Carvalho Chehab authored
- Remove $Id CVS logs for V4L files - Added DVICO FusionHDTV 5 Lite card. - Added Acorp Y878F. - CodingStyle fixes. - Added tuner_addr to bttv cards structure. - linux/version.h replaced by linux/utsname.h on bttvp.h - kernel module for acquiring RDS data from a SAA6588. - Allow multiple open() and reading calls to /dev/radio on bttv-driver.c - added i2c address for lgdt330x. Signed-off-by:
Hans J. Koch <koch@hjk-az.de> Signed-off-by:
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Mauro Carvalho Chehab authored
- Remove $Id CVS logs for V4L files - Included newer cards. - Added a new NEC protocol for ir based on pulse distance. - Enable ATSC support for DViCO FusionHDTV5 Gold. - Added tuner LG NTSC (TALN mini series). - Fixed tea5767 autodetection. - Resolve more tuner types. - Commented debug function removed from mainstream. - Remove comments from mainstream. Still on development tree. - linux/version dependencies removed. - BTSC Lang1 now is set to auto_stereo mode. - New tuner standby API. - i2c-core.c uses hexadecimal for the i2c address, so it should stay consistent. Signed-off-by:
Mac Michaels <wmichaels1@earthlink.net> Signed-off-by:
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Adrian Bunk authored
Things that are already expressed through the dependencies don't have to be mentioned in the help text. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Cc: Mauro Carvalho Chehab <mchehab@brturbo.com.br> Cc: Michael Krufky <mkrufky@m1k.net> Signed-off-by:
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Christoph Lameter authored
The NUMA API change that introduced kmalloc_node was accepted for 2.6.12-rc3. Now it is possible to do slab allocations on a node to localize memory structures. This API was used by the pageset localization patch and the block layer localization patch now in mm. The existing kmalloc_node is slow since it simply searches through all pages of the slab to find a page that is on the node requested. The two patches do a one time allocation of slab structures at initialization and therefore the speed of kmalloc node does not matter. This patch allows kmalloc_node to be as fast as kmalloc by introducing node specific page lists for partial, free and full slabs. Slab allocation improves in a NUMA system so that we are seeing a performance gain in AIM7 of about 5% with this patch alone. More NUMA localizations are possible if kmalloc_node operates in an fast way like kmalloc. Test run on a 32p systems with 32G Ram. w/o patch Tasks jobs/min jti jobs/min/task real cpu 1 485.36 100 485.3640 11.99 1.91 Sat Apr 30 14:01:51 2005 100 26582.63 88 265.8263 21.89 144.96 Sat Apr 30 14:02:14 2005 200 29866.83 81 149.3342 38.97 286.08 Sat Apr 30 14:02:53 2005 300 33127.16 78 110.4239 52.71 426.54 Sat Apr 30 14:03:46 2005 400 34889.47 80 87.2237 66.72 568.90 Sat Apr 30 14:04:53 2005 500 35654.34 76 71.3087 81.62 714.55 Sat Apr 30 14:06:15 2005 600 36460.83 75 60.7681 95.77 853.42 Sat Apr 30 14:07:51 2005 700 35957.00 75 51.3671 113.30 990.67 Sat Apr 30 14:09:45 2005 800 33380.65 73 41.7258 139.48 1140.86 Sat Apr 30 14:12:05 2005 900 35095.01 76 38.9945 149.25 1281.30 Sat Apr 30 14:14:35 2005 1000 36094.37 74 36.0944 161.24 1419.66 Sat Apr 30 14:17:17 2005 w/patch Tasks jobs/min jti jobs/min/task real cpu 1 484.27 100 484.2736 12.02 1.93 Sat Apr 30 15:59:45 2005 100 28262.03 90 282.6203 20.59 143.57 Sat Apr 30 16:00:06 2005 200 32246.45 82 161.2322 36.10 282.89 Sat Apr 30 16:00:42 2005 300 37945.80 83 126.4860 46.01 418.75 Sat Apr 30 16:01:28 2005 400 40000.69 81 100.0017 58.20 561.48 Sat Apr 30 16:02:27 2005 500 40976.10 78 81.9522 71.02 696.95 Sat Apr 30 16:03:38 2005 600 41121.54 78 68.5359 84.92 834.86 Sat Apr 30 16:05:04 2005 700 44052.77 78 62.9325 92.48 971.53 Sat Apr 30 16:06:37 2005 800 41066.89 79 51.3336 113.38 1111.15 Sat Apr 30 16:08:31 2005 900 38918.77 79 43.2431 134.59 1252.57 Sat Apr 30 16:10:46 2005 1000 41842.21 76 41.8422 139.09 1392.33 Sat Apr 30 16:13:05 2005 These are measurement taken directly after boot and show a greater improvement than 5%. However, the performance improvements become less over time if the AIM7 runs are repeated and settle down at around 5%. Links to earlier discussions: http://marc.theaimsgroup.com/?t=111094594500003&r=1&w=2 http://marc.theaimsgroup.com/?t=111603406600002&r=1&w=2 Changelog V4-V5: - alloc_arraycache and alloc_aliencache take node parameter instead of cpu - fix initialization so that nodes without cpus are properly handled. - simplify code in kmem_cache_init - patch against Andrews temp mm3 release - Add Shai to credits - fallback to __cache_alloc from __cache_alloc_node if the node's cache is not available yet. Changelog V3-V4: - Patch against 2.6.12-rc5-mm1 - Cleanup patch integrated - More and better use of for_each_node and for_each_cpu - GCC 2.95 fix (do not use [] use [0]) - Correct determination of INDEX_AC - Remove hack to cause an error on platforms that have no CONFIG_NUMA but nodes. - Remove list3_data and list3_data_ptr macros for better readability Changelog V2-V3: - Made to patch against 2.6.12-rc4-mm1 - Revised bootstrap mechanism so that larger size kmem_list3 structs can be supported. Do a generic solution so that the right slab can be found for the internal structs. - use for_each_online_node Changelog V1-V2: - Batching for freeing of wrong-node objects (alien caches) - Locking changes and NUMA #ifdefs as requested by Manfred Signed-off-by:Alok N Kataria <alokk@calsoftinc.com> Signed-off-by:
Shobhit Dayal <shobhit@calsoftinc.com> Signed-off-by:
Shai Fultheim <Shai@Scalex86.org> Signed-off-by:
Christoph Lameter <clameter@sgi.com> Cc: Manfred Spraul <manfred@colorfullife.com> Signed-off-by:
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Brice Goglin authored
Add a devname parameter to the pcmcia_device structure, fills it with "pcmcia<bus_id>" in pcmcia_device_add, and passes it to request_irq in pcmcia_request_irq. Signed-off-by:
Brice Goglin <Brice.Goglin@ens-lyon.org> Signed-off-by:
Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by:
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Dominik Brodowski authored
(Partly From: David Brownell <dbrownell@users.sourceforge.net> ) Make ID-CS recognize the CF card manufacturer records for Samsung, Lexar and STI. Signed-off-by:
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David Brownell authored
This adds a socket driver for the OMAP CF controller; it's currently in use on OSK boards. Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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Dominik Brodowski authored
config_t->Vpp1, Vpp2 and Vcc are never read, so remove them. Signed-off-by:
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Dominik Brodowski authored
client_t and CLIENT_MAGIC are unused, so remove them Signed-off-by:
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Daniel Ritz authored
extend cb_writel(), exca_writeb(), exca_writel() to do a read[lb]() after the write[lb]() to avoid possible problem with PCI write posting. Seems to fix Bug #5061. Signed-off-by:
Daniel Ritz <daniel.ritz@gmx.ch> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by:
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Daniel Ritz authored
multifunction cards need to have the same irq assigned to both functions. the code tries that but fails because ret is still set to CS_IN_USE which results in the function having the CB irq assigned. yenta_set_socket then just changes the irq routing to use the PCI interrupt but the first functions irq handler is registered on an ISA interrupt. boom. Signed-off-by:
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Daniel Ritz authored
- thread_done should only be completed when the wait_queue is installed. - all wake up conditions should be checked before schedule() this fixes a hang of rmmod in the sequence modprobe yenta_socket; rmmod yenta_socket as reported by Andreas Steinmetz. w/o this rmmod yenta_socket can hang on wait_for_completion() in pcmcia_unregister_socket() Signed-off-by:
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