The pages_high - pages_low and pages_low - pages_min deltas are the asynch
reclaim watermarks. As such, the should be in the same ratios as any other
zone for highmem zones. It is the pages_min - 0 delta which is the
PF_MEMALLOC reserve, and this is the region that isn't very useful for
highmem.
This patch ensures highmem systems have similar characteristics as non highmem
ones with the same amount of memory, and also that highmem zones get similar
reclaim pressures to other zones.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Remove last remnant of the defunct early reclaim page logic, the no longer
used __GFP_NORECLAIM flag bit.
Signed-off-by: Paul Jackson <pj@sgi.com>
Acked-by: Martin Hicks <mort@bork.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Clean up of __alloc_pages.
Restoration of previous behaviour, plus further cleanups by introducing an
'alloc_flags', removing the last of should_reclaim_zone.
Signed-off-by: Rohit Seth <rohit.seth@intel.com>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
The address based work estimate for unmapping (for lockbreak) is and always
was horribly inefficient for sparse mappings. The problem is most simply
explained with an example:
If we find a pgd is clear, we still have to call into unmap_page_range
PGDIR_SIZE / ZAP_BLOCK_SIZE times, each time checking the clear pgd, in
order to progress the working address to the next pgd.
The fundamental way to solve the problem is to keep track of the end
address we've processed and pass it back to the higher layers.
From: Nick Piggin <npiggin@suse.de>
Modification to completely get away from address based work estimate
and instead use an abstract count, with a very small cost for empty
entries as opposed to present pages.
On 2.6.14-git2, ppc64, and CONFIG_PREEMPT=y, mapping and unmapping 1TB
of virtual address space takes 1.69s; with the following patch applied,
this operation can be done 1000 times in less than 0.01s
From: Andrew Morton <akpm@osdl.org>
With CONFIG_HUTETLB_PAGE=n:
mm/memory.c: In function `unmap_vmas':
mm/memory.c:779: warning: division by zero
Due to
zap_work -= (end - start) /
(HPAGE_SIZE / PAGE_SIZE);
So make the dummy HPAGE_SIZE non-zero
Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
In __alloc_pages():
if ((p->flags & (PF_MEMALLOC | PF_MEMDIE)) && !in_interrupt()) {
/* go through the zonelist yet again, ignoring mins */
for (i = 0; zones[i] != NULL; i++) {
struct zone *z = zones[i];
page = buffered_rmqueue(z, order, gfp_mask);
if (page) {
zone_statistics(zonelist, z);
goto got_pg;
}
}
goto nopage; <<<< HERE!!! FAIL...
}
kswapd (which has PF_MEMALLOC flag) can fail to allocate memory even when
it allocates it with __GFP_NOFAIL flag.
Signed-Off-By: Pavel Emelianov <xemul@sw.ru>
Signed-Off-By: Denis Lunev <den@sw.ru>
Signed-Off-By: Kirill Korotaev <dev@sw.ru>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
drivers/pci/hotplug/pciehp_hpc.c:221: parse error before "pcie_isr"
drivers/pci/hotplug/pciehp_hpc.c:221: warning: type defaults to `int' in declaration of `pcie_isr'
drivers/pci/hotplug/pciehp_hpc.c:221: warning: data definition has no type or storage class
drivers/pci/hotplug/pciehp_hpc.c: In function `hpc_release_ctlr':
drivers/pci/hotplug/pciehp_hpc.c:715: implicit declaration of function `free_irq'
drivers/pci/hotplug/pciehp_hpc.c: At top level:
drivers/pci/hotplug/pciehp_hpc.c:839: parse error before "pcie_isr"
drivers/pci/hotplug/pciehp_hpc.c:840: warning: return type defaults to `int'
drivers/pci/hotplug/pciehp_hpc.c: In function `pcie_isr':
drivers/pci/hotplug/pciehp_hpc.c:850: `IRQ_NONE' undeclared (first use in this function)
drivers/pci/hotplug/pciehp_hpc.c:850: (Each undeclared identifier is reported only once
drivers/pci/hotplug/pciehp_hpc.c:850: for each function it appears in.)
drivers/pci/hotplug/pciehp_hpc.c:979: `IRQ_HANDLED' undeclared (first use in this function)
drivers/pci/hotplug/pciehp_hpc.c: In function `pcie_init':
drivers/pci/hotplug/pciehp_hpc.c:1362: implicit declaration of function `request_irq'
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Fix an error in w100fb after the platform device conversion.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
There is an old bug in the pkt_count_states() function that causes stack
corruption. When compiling with gcc 3.x or 2.x it is harmless, but gcc 4
allocates local variables differently, which makes the bug visible.
Signed-off-by: Peter Osterlund <petero2@telia.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
It is wrong to acquire the semaphore and then return from
cpuset_zone_allowed without releasing it.
Signed-off-by: Bob Picco <bob.picco@hp.com>
Acked-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
nvidiafb_pan_display() is incorrectly using the fields in info->var instead
of var passed to the function.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
(akpm: _machine is some ppc64 thing - this is a powerpc-only driver)
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
When ptrace_attach fails we need to drop the task_struct reference.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Exporting struct fb_display produces this warning error on depmod:
WARNING: Module
/lib/modules/2.6.14-mm2/kernel/drivers/video/console/fbcon_ud.ko
ignored, due to loop
WARNING: Module
/lib/modules/2.6.14-mm2/kernel/drivers/video/console/fbcon_rotate.ko
ignored, due to loop
WARNING: Module
/lib/modules/2.6.14-mm2/kernel/drivers/video/console/fbcon_cw.ko
ignored, due to loop
WARNING: Module
/lib/modules/2.6.14-mm2/kernel/drivers/video/console/fbcon_ccw.ko
ignored, due to loop
WARNING: Module
/lib/modules/2.6.14-mm2/kernel/drivers/video/console/fbcon.ko ignored,
due to loop
WARNING: Loop detected:
/lib/modules/2.6.14-mm2/kernel/drivers/video/console/bitblit.ko needs
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
drivers/video/nvidia/nv_of.c:33: error: redefinition of `nvidia_probe_of_connector'
drivers/video/nvidia/nv_proto.h:51: error: `nvidia_probe_of_connector' previously defined here
Because the inline version depends on !CONFIG_FB_OF and the out-of-line
version depends on CONFIG_PPC_OF.
Ben said: "Yes, CONFIG_PPC_OF is the right one, must be a typo."
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
C: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Changed jobs and the Freescale address is no longer valid.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Since few people need the support anymore, this moves the legacy
pm_xxx functions to CONFIG_PM_LEGACY, and include/linux/pm_legacy.h.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
The file_lock spinlock sits close to mostly read fields of 'struct
files_struct'
In SMP (and NUMA) environments, each time a thread wants to open or close
a file, it has to acquire the spinlock, thus invalidating the cache line
containing this spinlock on other CPUS. So other threads doing
read()/write()/... calls that use RCU to access the file table are going
to ask further memory (possibly NUMA) transactions to read again this
memory line.
Move the spinlock to another cache line, so that concurrent threads can
share the cache line containing 'count' and 'fdt' fields.
It's worth up to 9% on a microbenchmark using a 4-thread 2-package x86
machine. See
http://marc.theaimsgroup.com/?l=linux-kernel&m=112680448713342&w=2
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
attached patch renames one instance of
/sys/devices/system/timer
to
/sys/devices/system/timer_pit
to avoid a name clash with another instance created in time.c.
Acked-by: Andi Kleen <ak@muc.de>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
CONFIG_ELAN doesn't exist any more; CONFIG_X86_ELAN is too specific
so make ts-5500 memory map dependant on CONFIG_X86.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The patch
http://linux.bkbits.net:8080/linux-2.6/diffs/fs/locks.c@1.70??nav=index.html
introduced a pretty nasty memory leak in the lease code. When freeing
the lease, the code in locks_delete_lock() will correctly clean up
the fasync queue, but when we return to fcntl_setlease(), the freed
fasync entry will be reinstated.
This patch ensures that we skip the call to fasync_helper() when we're
freeing up the lease.
Signed-off-by: J. Bruce Fields <bfields@fieldses.org>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
sil24_port_stop() is missing call to ata_pad_free() thus leaking pad
buffer when a port is stopped. This patch adds it.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Some devices (e.g. Qlogic iSCSI HBA hardware like QLA4010 up to firmware
3.0.0.4) initiates TCP with SYN and PUSH flags set.
The Linux TCP/IP stack deals fine with that, but the connection tracking
code doesn't.
This patch alters TCP connection tracking to accept SYN+PUSH as a valid
flag combination.
Signed-off-by: Vlad Drukker <vlad@storewiz.com>
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
The recent change to netlink dump "done" callback handling broke IPv6
which played dirty tricks with the "done" callback. This causes an
infinite loop during a dump.
The following patch fixes it.
This bug was reported by Jeff Garzik.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch adds a new function, sbusfb_compat_ioctl() to
drivers/video/sbuslib.c and uses it as compat_ioctl in all sbus fb
drivers
This remove the last per-arch compat ioctl bits in
arch/sparc64/kernel/ioctl32.c so it would be nice if people could test
if this actually copiles and works and if yes apply it :)
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
On Fri, Nov 11, 2005 at 12:58:40PM -0800, David S. Miller wrote:
>
> This change:
>
> diff-tree 8ca2bdc7a9 (from feee207e44d3643d19e648aAuthor: Christoph Hellwig <hch@lst.de>
> Date: Wed Nov 9 12:07:18 2005 -0800
>
> [SPARC] sbus rtc: implement ->compat_ioctl
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Signed-off-by: David S. Miller <davem@davemloft.net>
>
> results in the console now getting spewed on sparc64 systems
> with messages like:
>
> [ 11.968298] ioctl32(hwclock:464): Unknown cmd fd(3) cmd(401c7014){00} arg(efc
> What's happening is hwclock tries first the SBUS rtc device ioctls
> then the normal rtc driver ones.
>
> So things actually worked better when we had the SBUS rtc compat ioctl
> directly handled via the generic compat ioctl code.
>
> There are _so_ many rtc drivers in the kernel implementing the
> generic rtc ioctls that I don't think putting a ->compat_ioctl
> into all of them to fix this problem is feasible. Unless we
> write a single rtc_compat_ioctl(), export it to modules, and hook
> it into all of those somehow.
>
> But even that doesn't appear to have any pretty implementation.
>
> Any better ideas?
We had similar problems with other ioctls where userspace did things
like that. What we did there was to put the compat handler to generic
code. The patch below does that, adding a big comment about what's
going on and removing the COMPAT_IOCTL entires for these on powerpc
that not only weren't ever useful but are duplicated now aswell.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Make /proc/i8k display '?' when service tag is blank in BIOS.
This fixes segfault in i8k gkrellm plugin.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This fixes
drivers/built-in.o: In function `flexcop_frontend_init':
: undefined reference to `lgdt330x_attach'
[ Side note: I really dislike that dvb people want to include every
possible frontend into the kernel - I only need the mt312 one for my
Skystar2 card. I'd highly appreciate it this would be made selectable
again... ]
Signed-off-by: Prakash Punnoor <prakash@punnoor.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
With generic dispatch queue update, implicit former/latter request
handling using rq->queuelist.prev/next doesn't work as expected
anymore. Also, the only iosched dependent on this feature was
noop-iosched and it has been reimplemented to have its own
latter/former methods. This patch removes implicit former/latter
handling.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
The original implementation directly used dispatch queue. As new
generic dispatch queue imposes stricter rules over ioscheds and
dispatch queue usage, this direct use becomes somewhat problematic.
This patch reimplements noop-iosched such that it complies to generic
iosched model better. Request merging with q->last_merge and
rq->queuelist.prev/next work again now.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de
When cfq slice expires, remainder of slice is calculated and stored in
cfqq->slice_left. Current code calculates the opposite of remainder -
how many jiffies the cfqq has used past slice end. This patch fixes
the bug.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
elv_iosched_store doesn't terminate string passed from userspace if
it's too long. Also, if the written length is zero (probably not
possible), it accesses elevator_name[-1]. This patch fixes both bugs.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
This patch adds request_queue->nr_sorted which keeps the number of
requests in the iosched and implement elv_drain_elevator which
performs forced dispatching. elv_drain_elevator checks whether
iosched actually dispatches all requests it has and prints error
message if it doesn't. As buggy forced dispatching can result in
wrong barrier operations, I think this extra check is worthwhile.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
cfq forced dispatching might not return all requests on the queue.
This bug can hang elevator switchinig and corrupt request ordering
during flush sequence.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
In addition to the first patch, which is probably goodness, I found the
cause of my panic - applying this patch fixes it and now I am booting.
If the chosen_elevator[] is not found, fall back to noop.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jens Axboe <axboe@suse.de>
