Mailing List Archive by Gossamer Threads http://www.gossamer-threads.com/lists/linux/kernel/ en-us (c) Gossamer Threads Inc. All rights reserved. 12 Feb 2012 16:13:02 -0800 120 75 23 http://www.gossamer-threads.com/lists/linux/kernel/ http://www.gossamer-threads.com/images/lists/rss_logo.jpg Allow this macro to be used in an if/else block. Use do {} while (0) and pr_info. (perhaps this should be pr_debug) Signed-off-by: Joe Perches <joe@ 12 Feb 2012 13:59:37 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490903 Traditionally the kernel has refused to setup EFI at all if there's been a mismatch in 32/64-bit mode between EFI and the kernel. On some platforms t 12 Feb 2012 13:24:29 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490894 It's not perfect, but way better than before. Mark efi_enabled as false in case of error and at least stop dereferencing pointers that are known to be 12 Feb 2012 13:24:28 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490895 Trivial cleanup, move guid and table pointers to local copies to make the code cleaner. Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Matt 12 Feb 2012 13:24:27 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490893 Alright, I guess I'll go through and convert them, even though there's no net gain to speak of. v4: * Switched to pr_fmt and removed some redundant u 12 Feb 2012 13:24:26 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490897 Break out some of the init steps into helper functions. Only change to execution flow is the removal of the warning when the kernel memdesc structure 12 Feb 2012 13:24:25 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490896 This series allows basic booting of a 32-bit kernel on 64-bit EFI and vice versa. It's needed by Chrome OS, and we've been carrying a nasty hack to d 12 Feb 2012 13:24:24 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490892 I've just released Linux 2.6.27.60. Note that a build failure was reported for i386 just after the release and before this announcement. I'm preparin 12 Feb 2012 12:51:03 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490883 Drivers b43 and b43legacy both load their firmware from their probe routines, which is a problem with the latest udev implementations, and I'm trying 12 Feb 2012 11:08:28 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490874 Hello all, Here, I'm going to introduce an alternative load distribution algorithm for Linux kernel scheduler. This technique is named as "The Barber 12 Feb 2012 10:52:39 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490872 Hello, I have a question about controlling performance counter in kernel. I created a kernel counter which generates an interrupt at every 10000 cac 12 Feb 2012 10:37:30 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490870 Found show_msr=n is broken when try to ask user to get debug info about broken mtrr. (setting are different between cpus) Originally we call print_cp 12 Feb 2012 09:53:57 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490866 Found show_msr=n is broken when try to ask user to get debug info about broken mtrr. (setting are different between cpus) Originally we call print_cp 12 Feb 2012 09:36:50 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490862 Hi, This problem has been since 3.3-rc1, but I only now am getting around to reporting it, sorry about that. In 3.3-rc3, my alps touchpad isn't reco 12 Feb 2012 08:47:28 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490853 GPIO logic of core powered and resume powered gpios on Intel SCH/Tunnel Creek is the same, make wrappers for them with appropriate base registers. Si 12 Feb 2012 08:45:58 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490852 Resume powered gpio pins SUS_GPIO[3:0] on Intel SCH may be disabled by BIOS setting, need to enable them explicitly. Signed-off-by: Denis Turischev < 12 Feb 2012 08:42:20 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490851 abrt_version: 2.0.7 cmdline: BOOT_IMAGE=/vmlinuz-3.2.3 root=/dev/sda2 rootfstype=ext4 rootflags=data=writeback ro quiet rhgb kernel: 12 Feb 2012 08:16:43 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490857 abrt_version: 2.0.7 cmdline: BOOT_IMAGE=/vmlinuz-3.2.0 root=/dev/sda2 rootfstype=ext4 rootflags=data=writeback ro quiet rhgb kernel: 12 Feb 2012 08:09:36 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490859 abrt_version: 2.0.7 cmdline: BOOT_IMAGE=/vmlinuz-3.2.5 root=/dev/sda2 rootfstype=ext4 rootflags=data=writeback ro quiet rhgb kernel: 12 Feb 2012 08:00:42 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490860 The bulk_write() supports the data transfer to multi register which takes the data into cpu_endianness format and does formatting of data to device fo 12 Feb 2012 06:19:43 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490844 Below is the list of build error/warning regressions/improvements in v3.3-rc3[1] compared to v3.2[2]. Note that I deleted 981 lines about "__mcount_lo 12 Feb 2012 06:02:09 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490839 Correct spelling "Manangement" to "Management" in arch/arm/plat-s3c24xx/pm-simtec.c Signed-off-by: Masanari Iida <standby24x7@gmail.com> --- arch/ar 12 Feb 2012 05:58:46 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490840 Correct spelling "drivr" to "driver" in drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c Signed 12 Feb 2012 05:45:41 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490838 Correct spelling "modul" to "module" in drivers/isdn/mISDN/dsp_core.c Signed-off-by: Masanari Iida <standby24x7@gmail.com> --- drivers/isdn/mISDN/ds 12 Feb 2012 05:37:06 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490837 [ resent to lkml in 'plain-text' format ] On 10 February 2012 01:16, John Stultz <john.stultz@linaro.org> wrote: [ ... ] > --- /dev/null > +++ b/mm 12 Feb 2012 04:54:35 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490832 This patch converts the drivers in drivers/media/* to use the module_i2_driver() macro which makes the code smaller and a bit simpler. Signed-off-by: 12 Feb 2012 02:56:32 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490819 The perf python extention (perf.so) file lacks its dependencies in the Makefile so that it cannot be refreshed if one of source files it depends is ch 12 Feb 2012 02:45:24 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490817 The first parameter should be "number of elements" and the second parameter should be "element size". Signed-off-by: Axel Lin <axel.lin@gmail.com> -- 12 Feb 2012 01:43:22 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490816 The bulk_write() supports the data transfer to multi register which takes the data into cpu_endianness format and does formatting of data to device fo 12 Feb 2012 00:49:16 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490814 Hi, Kernel boot failed on 3.3.0-rc3-next-20120210-arm. [    3.305847] BUG: scheduling while atomic: init/1/0x00000000 [    3.311706] Modules linked 11 Feb 2012 22:14:36 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490810 Found show_msr=n is broken when try to ask user to get debug info about broken mtrr. (setting are different between cpus) Originally we call print_cp 11 Feb 2012 19:08:41 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490805 On Sat, Feb 11, 2012 at 3:09 PM, tip-bot for Don Zickus <dzickus@redhat.com> wrote: > Commit-ID:  d9bc9be89629445758670220787683e37c93f6c1 > Gitweb:   11 Feb 2012 17:04:15 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490797 Hi all, Just a quick note to say I got a boot OOPs with next-20120208 and 9 on a Power7 blade (my other PowerPC boot tests are ok. I'll investigate 11 Feb 2012 16:38:05 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490795 Whoops, I messed up the subject line. Sorry! Am 12.02.2012 01:21, schrieb Richard Weinberger: > Can you please review this patch? > > Thanks, > //r 11 Feb 2012 16:24:36 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490793 Commit 141168c36cde ("x86: Simplify code by removing a !SMP #ifdefs from 'struct cpuinfo_x86'") caused the compilation error: mce_amd.c:(.cpuinit.tex 11 Feb 2012 16:24:12 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490792 According to the POSIX standard the POSIX_FADV_NOREUSE hint means that the application expects to access the specified data once and then not reuse it 11 Feb 2012 16:21:38 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490790 Introduce a helper function to drop a page from the page cache if it is evictable, inactive and unreferenced. This can be used to drop used-once page 11 Feb 2012 16:21:37 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490787 Add a generic infrastructure to efficiently keep track of intervals. An interval is represented by a triplet (start, end, type). The values (start, e 11 Feb 2012 16:21:36 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490789 There were some reported problems in the past about trashing page cache when a backup software (i.e., rsync) touches a huge amount of pages (see for e 11 Feb 2012 16:21:35 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490788 1) unless I'm seriously misreading hexagon vm_entry.S, once we'd called do_notify_resume, we do *not* recheck if there's more work to be done. In par 11 Feb 2012 15:27:40 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490782 Commit-ID: 9388dc3047a88bedfd867e9ba3e1980c815ac524 Gitweb: http://git.kernel.org/tip/9388dc3047a88bedfd867e9ba3e1980c815ac524 Author: Anton 11 Feb 2012 15:10:36 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490780 Commit-ID: f8d98f1095210da708a59f3a0b6fd267ad8f3f03 Gitweb: http://git.kernel.org/tip/f8d98f1095210da708a59f3a0b6fd267ad8f3f03 Author: Masami 11 Feb 2012 15:08:59 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490779 Commit-ID: 86f5e6a7b192721995ece919985ac75222402351 Gitweb: http://git.kernel.org/tip/86f5e6a7b192721995ece919985ac75222402351 Author: Fernan 11 Feb 2012 15:08:12 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490778 Commit-ID: 5f329089431aac08bf759fa2bcb34077a6aa1f4e Gitweb: http://git.kernel.org/tip/5f329089431aac08bf759fa2bcb34077a6aa1f4e Author: Fernan 11 Feb 2012 15:07:25 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490777 Commit-ID: 9919cba7ff71147803c988521cc1ceb80e7f0f6d Gitweb: http://git.kernel.org/tip/9919cba7ff71147803c988521cc1ceb80e7f0f6d Author: Fernan 11 Feb 2012 15:06:36 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490776 From: Rafael J. Wysocki <rjw@sisk.pl> Since suspend_stats_update() is only called from pm_suspend(), move its code directly into that function and re 11 Feb 2012 15:06:05 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490773 From: Rafael J. Wysocki <rjw@sisk.pl> The enter_state() function in kernel/power/suspend.c should be static and state_store() in kernel/power/suspend 11 Feb 2012 15:04:48 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490772 Commit fa8031aefec0cf7ea6c2387c93610d99d9659aa2 ('cpufreq: Add support for x86 cpuinfo auto loading v4') added a device ID table to this driver, but d 11 Feb 2012 15:04:12 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490774 From: Rafael J. Wysocki <rjw@sisk.pl> The kerneldoc comments in kernel/power/suspend.c are not formatted in the same way and the quality of some of t 11 Feb 2012 15:04:07 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490771 Hi, The following three patches clean up the core system suspend code. [1/3] - Unify and improve kerneldoc comments in kernel/power/suspend.c. [2/3] 11 Feb 2012 15:03:20 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490770 Commit fa8031aefec0cf7ea6c2387c93610d99d9659aa2 ('cpufreq: Add support for x86 cpuinfo auto loading v4') seems to have inadvertently changed the match 11 Feb 2012 14:55:59 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490769 Commit b66b8b9a4a79087dde1b358a016e5c8739ccf186 ('intel-idle: convert to x86_cpu_id auto probing') added a distinction between Nehalem and Westemere p 11 Feb 2012 14:55:10 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490768 Commit b66b8b9a4a79087dde1b358a016e5c8739ccf186 ('intel-idle: convert to x86_cpu_id auto probing') put two entries for model 0x2f (Westmere-EX Xeon) i 11 Feb 2012 14:54:23 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490767 We currently include commas on both sides of the feature ID in a modalias, but this prevents the lowest numbered feature of a CPU from being matched. 11 Feb 2012 14:52:34 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490766 snprintf() does not return a negative value when truncating. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- arch/x86/kernel/cpu/match.c | 11 Feb 2012 14:46:17 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490765 This series fixes a number of apparent bugs in the recent changes to enable auto-loading by x86 CPU ID. Ben. Ben Hutchings (5): x86/cpu: Fix overr 11 Feb 2012 14:44:16 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490764 Good day to you, I greet you in the name of our Lord,i write to you today seeking for your help and assistance in setting up a charity with funds tha 11 Feb 2012 12:21:47 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490760 On Sun, 2012-02-12 at 00:03 +0400, Vasiliy Kulikov wrote: > On Sat, Feb 11, 2012 at 13:30 -0600, Will Drewry wrote: > > (As a side note, I realize the 11 Feb 2012 12:19:03 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490757 I just installed the new kernel with yum update. I have an external eSATA hard drive that is formatted with btrfs. I closed the lid once it had boo 11 Feb 2012 12:04:50 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490756 Commit 9863c90f682fba34cdc26c3437e8c00da6c83fa4 (x86, vmware: Remove deprecated VMI kernel support) removed the only place which set no_sync_cmos_cloc 11 Feb 2012 11:54:59 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490754 This commit also adds an entry to the MAINTAINERS file. Signed-off-by: Chris Boot <bootc@bootc.net> Cc: Andy Grover <agrover@redhat.com> Cc: Clemens 11 Feb 2012 11:44:12 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490750 Common helper functions and global declarations. Signed-off-by: Chris Boot <bootc@bootc.net> Cc: Andy Grover <agrover@redhat.com> Cc: Clemens Ladisch 11 Feb 2012 11:44:11 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490748 Miscellaneous functions for dealing with SCSI commands, status, sense data and data read/write. This is where the real grunt work of pushing data in a 11 Feb 2012 11:44:10 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490746 This implements the SBP-2 Command Block Agent, or Target Agent. This is what receives SCSI commands and forwards them to the target framework. Signed 11 Feb 2012 11:44:09 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490752 This file contains the implementation of the login, reconnect and logout management ORBs in SBP-2. Signed-off-by: Chris Boot <bootc@bootc.net> Cc: An 11 Feb 2012 11:44:08 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490744 This code implements the SBP-2 Management Agent. This is the first of two firewire address handlers that are used to communicate with the target. The 11 Feb 2012 11:44:07 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490743 These are functions to generate TransportID identifiers as per SPC-4 revision 17. Signed-off-by: Chris Boot <bootc@bootc.net> Cc: Andy Grover <agrove 11 Feb 2012 11:44:06 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490742 This serves as further glue between the target framework and SBP-2, in this case dealing with SCSI command submission and data in/out. Signed-off-by: 11 Feb 2012 11:44:05 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490745 This is used to glue the target framework's configfs code to the target code, and what is used to create targets and link them to LUNs to export. The 11 Feb 2012 11:44:04 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490749 This header contains defines and structures that are common to many of the modules of the target code. This includes SBP-2 protocol structures and con 11 Feb 2012 11:44:03 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490741 The FireWire SBP-2 Target is a driver for using an IEEE-1394 connection as a SCSI transport. This module uses the SCSI Target framework to expose LUNs 11 Feb 2012 11:44:02 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490751 The firewire-sbp-target module requires this so it can keep a reference to the fw_card object in order that it can fetch ORBs to execute and read/writ 11 Feb 2012 11:44:01 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490739 Sometimes it's useful to know the FireWire speed of the request that has just come in to a fw_address_handler callback. As struct fw_request is opaque 11 Feb 2012 11:44:00 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490740 Hi folks, Well after lots of work I have a working and generally (at least I think) sensible starting point for the FireWire target. It appears to wo 11 Feb 2012 11:43:59 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490747 Greetings all; Users of the RTAI facility to run certain processes on a cpu core that has been isolated by the boot parameter 'isolcpus=n' command n 11 Feb 2012 11:08:06 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490736 Currently most code to get child count in kernel are almost same, add a helper to implement this function for dt to use. Signed-off-by: Dong Aisheng 11 Feb 2012 09:22:09 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490732 Stack for a new thread is mapped by userspace code and passed via sys_clone. This memory is currently seen as anonymous in /proc/<pid>/maps, which mak 11 Feb 2012 07:03:16 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490725 From: "Justin P. Mattock" <justinmattock@gmail.com> The below patch fixes some typos "aditional" to "additional", and also fixes a comment with anoth 11 Feb 2012 05:55:58 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490713 Dear All, I am trying to transplant the linux kernel. I downloaded the linux kernel and got the cross compiler from ftp://ftp.arm.linux.org.uk/pub/a 11 Feb 2012 05:00:22 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490707 Correct spelling "faied" to "failed" in tools/testing/ktest/ktest.pl Signed-off-by: Masanari Iida <standby24x7@gmail.com> --- tools/testing/ktest/kt 11 Feb 2012 04:46:56 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490706 Correct spelling "endianess" to "endianness" in fs/cramfs/inode.c Signed-off-by: Masanari Iida <standby24x7@gmail.com> --- fs/cramfs/inode.c | 6 11 Feb 2012 04:35:12 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490705 Correct spelling "alocate" to "allocate" in drivers/usb/host/imx21-dbg.c --- drivers/usb/host/imx21-dbg.c | 2 +- 1 files changed, 1 insertions(+) 11 Feb 2012 04:19:10 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490699 Hi Linus, Time to push off some of the pending items. I really wanted to wait until we had the regression nailed, but alas it's not quite there yet. 11 Feb 2012 04:11:11 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490697 Hello there, I am currently working with an embedded system based on a OMAP-L138. We are developing a Software Defined Radio (SDR) which is sending a 11 Feb 2012 04:08:47 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490696 Correct spelling "reseting" to "resetting" in drivers/net/wireless/hostap/hostap_hw.c Signed-off-by: Masanari Iida <standby24x7@gmail.com> --- drive 11 Feb 2012 03:56:59 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490694 Correct spelling "reseting" to "resetting" in drivers/isdn/i4l/isdn_ppp.c Signed-off-by: Masanari Iida <standby24x7@gmail.com> --- drivers/isdn/i4l/ 11 Feb 2012 03:49:28 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490692 Only have user in driver/pci/pci.c Don't need to put it in global pci.h Signed-off-by: Yinghai Lu <yinghai@kernel.org. --- drivers/pci/pci.c | 11 Feb 2012 00:18:41 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490670 unreferenced object 0xffff880276d17700 (size 64): comm "swapper/0", pid 1, jiffies 4294897182 (age 3976.028s) hex dump (first 32 bytes): 00 00 11 Feb 2012 00:18:30 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490669 Since 2a11c8ea20bf850 there is generic grep-friendly method for checking config options in C expressions. Signed-off-by: Konstantin Khlebnikov <khleb 10 Feb 2012 23:54:15 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490667 find_get_pages() now can skip unlimited count of exeptional entries, so truncate_inode_pages_range() can truncate pages from shmem inodes. Thus shmem_ 10 Feb 2012 23:44:08 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490666 Fix warning added in patch "shmem: tag swap entries in radix tree" Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org> --- mm/shmem.c | 3 10 Feb 2012 23:43:52 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490665 Welcome To Western® Union Office Website: www.westernunion.com Dear Western Union value customer, We happilly announce to you that you have be 10 Feb 2012 22:04:34 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490668 We have hit an issue where our 32-bit applications using poll() and passing in a value of -1 for the timeout value return after ~49 days (2^32 msec), 10 Feb 2012 21:54:49 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490657 Since commit 2f36825b1 ("sched: Next buddy hint on sleep and preempt path") it is likely we pick a new task from the same cgroup, doing a put and then 10 Feb 2012 21:05:00 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490655 Add the backwards prefetching feature. It's pretty simple if we don't support async prefetching and interleaved reads. tail and tac are observed to h 10 Feb 2012 20:31:49 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490682 If the file size is 20kb and readahead request is [.0, 16kb), it's better to expand the readahead request to [.0, 20kb), which will likely save one fo 10 Feb 2012 20:31:48 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490677 Some applications (eg. blkid, id3tool etc.) seek around the file to get information. For example, blkid does seek to 0 r 10 Feb 2012 20:31:47 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490675 This accounting code won't be compiled by default (CONFIG_READAHEAD_STATS=n). It's expected to be runtime reset and enabled before using: ec 10 Feb 2012 20:31:46 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490679 This is very useful for verifying whether the readahead algorithms are working to the expectation. Example output: # echo 1 > /debug/tracing/events/ 10 Feb 2012 20:31:45 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490674 We may be doing more metadata readahead in future. Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> --- fs/ext 10 Feb 2012 20:31:44 -0800 http://www.gossamer-threads.com/lists/linux/kernel/1490681