This is the core io-throttle kernel infrastructure. It creates the basic interfaces to cgroups and implements the I/O measurement and throttling functions. Signed-off-by: Andrea Righi <righi.andrea@gmail.com> --- block/Makefile | 2 + block/blk-io-throttle.c | 405 +++++++++++++++++++++++++++++++++++++++ include/linux/blk-io-throttle.h | 12 ++ include/linux/cgroup_subsys.h | 6 + init/Kconfig | 10 + 5 files changed, 435 insertions...

Documentation of the block device I/O bandwidth controller: description, usage, advantages and design. Signed-off-by: Andrea Righi <righi.andrea@gmail.com> --- Documentation/controllers/io-throttle.txt | 150 +++++++++++++++++++++++++++++ 1 files changed, 150 insertions(+), 0 deletions(-) create mode 100644 Documentation/controllers/io-throttle.txt diff --git a/Documentation/controllers/io-throttle.txt b/Documentation/controllers/io-throttle.txt new file mode 100644 index 0000000..5373...

I'm curious as to why this check was removed. Any specific reason? It was valid from what I can tell. thanks, greg k-h --

diff --git a/Makefile b/Makefile index d921f0b..c5208db 100644 --- a/Makefile +++ b/Makefile @@ -1,7 +1,7 @@ VERSION = 2 PATCHLEVEL = 6 SUBLEVEL = 25 -EXTRAVERSION = .4 +EXTRAVERSION = .5 NAME = Funky Weasel is Jiggy wit it # *DOCUMENTATION* diff --git a/fs/cifs/asn1.c b/fs/cifs/asn1.c index bcda2c6..5dbba89 100644 --- a/fs/cifs/asn1.c +++ b/fs/cifs/asn1.c @@ -186,6 +186,11 @@ asn1_length_decode(struct asn1_ctx *ctx, unsigned int *def, unsigned int *len) } } } + + /* do...

We are pleased to announce the 2.6.25.4-rt6 tree, which can be downloaded from the location: http://rt.et.redhat.com/download/ Information on the RT patch can be found at: http://rt.wiki.kernel.org/index.php/Main_Page Changes since 2.6.25.4-rt5 - sched_cpupri hotplug support (Gregory Haskins) - sched_cpupri prio count (Gregory Haskins) - ftrace hotplug fix (Steven Rostedt) to build a 2.6.25.4-rt6 tree, the following patches should be applied: [ message continues ]

Hi Linus, Please pull from: git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git for_linus These are all cleanups and bug fixes against 2.6.26-rc5 Thanks, - Ted Aneesh Kumar K.V (1): ext4: Fix use of uninitialized data with debug enabled. Eric Sandeen (1): ext4: enable barriers by default Jose R. Santos (1): ext4: Fix uninit block group initialization with FLEX_BG Josef Bacik (1): ext4: fix online resize bug Theodore Ts'o (4)...

Alan has fixed PCI layer handling of PCI IDE in Compatibility mode so PCI BAR 0/1 (and/or 2/3) content reported by kernel should never be zero. Tighten checks on PCI BARs and also fix printk() message while on it. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> --- drivers/ide/setup-pci.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) Index: b/drivers/ide/setup-pci.c =================================================================== --- a/drivers/...

* Move ide_find_port() and default_hwif_mmiops() calls from icside_setup() to icside_register_v{5,6}(). * Convert icside_setup() to initialize hw_regs_t instead ide_hwif_t and icside_register_v{5,6}() to use ide_init_port_hw(). * Rename icside_setup() to icside_setup_ports(). There should be no functional changes caused by this patch. Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> --- drivers/ide/arm/icside.c | 72 +++...

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That's a thinko. 2.6.26-rc5 does not exhibit the behavior. Sorry. 2.6.25.4 also does not, of course. --

bas_gigaset can't be unloaded due to wrong module reference counting. Ensure that module_put is called whenever a channel is freed. Signed-off-by: Andreas Herrmann <aherrman@arcor.de> --- drivers/isdn/gigaset/common.c | 5 +---- drivers/isdn/gigaset/gigaset.h | 1 - 2 files changed, 1 insertions(+), 5 deletions(-) diff --git a/drivers/isdn/gigaset/common.c b/drivers/isdn/gigaset/common.c index 827c32c..8498317 100644 --- a/drivers/isdn/gigaset/common.c +++ b/drivers/isdn/gigaset/...

Originally From: Nick Piggin <npiggin@suse.de> Against: 2.6.26-rc2-mm1 This patch: 1) defines the [CONFIG_]NORECLAIM_MLOCK sub-option and the stub version of the mlock/noreclaim APIs when it's not configured. Depends on [CONFIG_]NORECLAIM_LRU. 2) add yet another page flag--PG_mlocked--to indicate that the page is locked for efficient testing in vmscan and, optionally, fault path. This allows early culling of nonreclaimable pages, preventing them from getting to ...

From: Lee Schermerhorn <lee.schermerhorn@hp.com> Documentation for noreclaim lru list and its usage. Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Rik van Riel <riel@redhat.com> --- Documentation/vm/noreclaim-lru.txt | 609 +++++++++++++++++++++++++++++++++++++ 1 file changed, 609 insertions(+) Index: linux-2.6.26-rc2-mm1/Documentation/vm/noreclaim-lru.txt =================================================================== --- /dev/null 1970-...

From: Lee Schermerhorn <lee.schermerhorn@hp.com> Allow free of mlock()ed pages. This shouldn't happen, but during developement, it occasionally did. This patch allows us to survive that condition, while keeping the statistics and events correct for debug. Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Rik van Riel <riel@redhat.com> --- include/linux/vmstat.h | 1 + mm/internal.h | 17 +++++++++++++++++ mm/page_alloc.c ...

From: Lee Schermerhorn <lee.schermerhorn@hp.com> Against: 2.6.26-rc2-mm1 We need to hold the mmap_sem for write to initiatate mlock()/munlock() because we may need to merge/split vmas. However, this can lead to very long lock hold times attempting to fault in a large memory region to mlock it into memory. This can hold off other faults against the mm [multithreaded tasks] and other scans of the mm, such as via /proc. To alleviate this, downgrade the mmap_sem to read mode during the po...

From: Rik van Riel <riel@redhat.com> We avoid evicting and scanning anonymous pages for the most part, but under some workloads we can end up with most of memory filled with anonymous pages. At that point, we suddenly need to clear the referenced bits on all of memory, which can take ages on very large memory systems. We can reduce the maximum number of pages that need to be scanned by not taking the referenced state into account when deactivating an anonymous page. After all, every anony...

From: Nick Piggin <npiggin@suse.de> isolate_lru_page logically belongs to be in vmscan.c than migrate.c. It is tough, because we don't need that function without memory migration so there is a valid argument to have it in migrate.c. However a subsequent patch needs to make use of it in the core mm, so we can happily move it to vmscan.c. Also, make the function a little more generic by not requiring that it adds an isolated page to a given list. Callers can do that. Note that we now ha...

From: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Infrastructure to manage pages excluded from reclaim--i.e., hidden from vmscan. Based on a patch by Larry Woodman of Red Hat. Reworked to maintain "nonreclaimable" pages on a separate per-zone LRU list, to "hide" them from vmscan. Kosaki Motohiro added the support for the memory controller noreclaim lru list. Pages on the noreclaim list have both PG_noreclaim and PG_lru set. Thus, PG_noreclaim is analogous to and mutually exclusive with...

From: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Christoph Lameter pointed out that ram disk pages also clutter the LRU lists. When vmscan finds them dirty and tries to clean them, the ram disk writeback function just redirties the page so that it goes back onto the active list. Round and round she goes... Define new address_space flag [shares address_space flags member with mapping's gfp mask] to indicate that the address space contains all non-reclaimable pages. This will provide for...

From: Lee Schermerhorn <lee.schermerhorn@hp.com> Against: 2.6.26-rc2-mm1 Add some event counters to vmstats for testing noreclaim/mlock. Some of these might be interesting enough to keep around. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Rik van Riel <riel@redhat.com> --- include/linux/vmstat.h | 11 +++++++++++ mm/internal.h | 4 +++- mm/mlock.c ...

From: Christoph Lameter <clameter@sgi.com> Currently we are defining explicit variables for the inactive and active list. An indexed array can be more generic and avoid repeating similar code in several places in the reclaim code. We are saving a few bytes in terms of code size: Before: text data bss dec hex filename 4097753 573120 4092484 8763357 85b7dd vmlinux After: text data bss dec hex filename 4097729 573120 4092484 8763333 85b7c5 vml...

On Fri, 6 Jun 2008 14:02:16 -0700 Benchmark results here indicate that it helps some workloads by up to 10%, but makes the page cache pages that fall off of the active list more prone to being replaced by streaming IO. I have added in a fix in this series to set the referenced bit on unmapped page cache pages that get deactivated, so that defect is resolved. I've been busy with some other stuff this week; I'll try to get you some numbers ASAP. -- All rights reversed. --

From: Rik van Riel <riel@redhat.com> The access ratio based scan rate determination in get_scan_ratio works ok in most situations, but needs to be corrected in some corner cases: - if we run out of swap space, do not bother scanning the anon LRUs - if we have already freed all of the page cache, we need to scan the anon LRUs - restore the *actual* access ratio based scan rate algorithm, the previous versions of this patch series had the wrong version - scale the number of pages added to...

From: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Report non-reclaimable pages per zone and system wide. Kosaki Motohiro added support for memory controller noreclaim statistics. Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Rik van Riel <riel@redhat.com> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> --- drivers/base/node.c | 6 ++++++ fs/proc/proc_misc.c | 6 ++++++ mm/memcontrol.c | 6 ++++++ mm/page_a...

From: Lee Schermerhorn <lee.schermerhorn@hp.com> Define proper false/noop inline functions for noreclaim page flags when !defined(CONFIG_NORECLAIM_LRU) Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Rik van Riel <riel@redhat.com> --- include/linux/page-flags.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) Index: linux-2.6.26-rc2-mm1/include/linux/page-flags.h =================================================================== --- linux-2...