- Mar 09, 2006
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Dipankar Sarma authored
I have benchmarked this on an x86_64 NUMA system and see no significant performance difference on kernbench. Tested on both x86_64 and powerpc. The way we do file struct accounting is not very suitable for batched freeing. For scalability reasons, file accounting was constructor/destructor based. This meant that nr_files was decremented only when the object was removed from the slab cache. This is susceptible to slab fragmentation. With RCU based file structure, consequent batched freeing and a test program like Serge's, we just speed this up and end up with a very fragmented slab - llm22:~ # cat /proc/sys/fs/file-nr 587730 0 758844 At the same time, I see only a 2000+ objects in filp cache. The following patch I fixes this problem. This patch changes the file counting by removing the filp_count_lock. Instead we use a separate percpu counter, nr_files, for now and all accesses to it are through get_nr_files() api. In the sysctl handler for nr_files, we populate files_stat.nr_files before returning to user. Counting files as an when they are created and destroyed (as opposed to inside slab) allows us to correctly count open files with RCU. Signed-off-by:
Dipankar Sarma <dipankar@in.ibm.com> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Dipankar Sarma authored
This patch adds new tunables for RCU queue and finished batches. There are two types of controls - number of completed RCU updates invoked in a batch (blimit) and monitoring for high rate of incoming RCUs on a cpu (qhimark, qlowmark). By default, the per-cpu batch limit is set to a small value. If the input RCU rate exceeds the high watermark, we do two things - force quiescent state on all cpus and set the batch limit of the CPU to INTMAX. Setting batch limit to INTMAX forces all finished RCUs to be processed in one shot. If we have more than INTMAX RCUs queued up, then we have bigger problems anyway. Once the incoming queued RCUs fall below the low watermark, the batch limit is set to the default. Signed-off-by:
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Andrew Morton authored
Implement percpu_counter_sum(). This is a more accurate but slower version of percpu_counter_read_positive(). We need this for Alex's speedup-ext3_statfs patch and for the nr_file accounting fix. Otherwise these things would be too inaccurate on large CPU counts. Cc: Ravikiran G Thirumalai <kiran@scalex86.org> Cc: Alex Tomas <alex@clusterfs.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by:
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GOTO Masanori authored
Fix i386 nmi_watchdog that does not meet watchdog timeout condition. It does not hit die_nmi when it should be triggered, because the current nmi_watchdog_tick in arch/i386/kernel/nmi.c never count up alert_counter like this: void nmi_watchdog_tick (struct pt_regs * regs) { if (last_irq_sums[cpu] == sum) { alert_counter[cpu]++; <- count up alert_counter, but if (alert_counter[cpu] == 5*nmi_hz) die_nmi(regs, "NMI Watchdog detected LOCKUP"); alert_counter[cpu] = 0; <- reset alert_counter This patch changes it back to the previous and working version. This was found and originally written by Kohta NAKASHIMA. (akpm: also uninline write_watchdog_counter(), saving 184 byets) Signed-off-by:GOTO Masanori <gotom@sanori.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Atsushi Nemoto authored
If the 'ptr' is a const, this code cause "assignment of read-only variable" error on gcc 4.x. Use __u64 instead of __typeof__(*(ptr)) for temporary variable to get rid of errors on gcc 4.x. Signed-off-by:
Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by:
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Ingo Molnar authored
Idle threads should have a sane ->timestamp value, to avoid init kernel thread(s) from inheriting it and causing miscalculations in try_to_wake_up(). Reported-by:
Mike Galbraith <efault@gmx.de>.> Signed-off-by:
Ingo Molnar <mingo@elte.hu> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by:
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Phillip Susi authored
Fix a bug in udf where it would write uid/gid = 0 to the disk for files owned by the id given with the uid=/gid= mount options. It also adds 4 new mount options: uid/gid=forget and uid/gid=ignore. Without any options the id in core and on disk always match. Giving uid/gid=nnn specifies a default ID to be used in core when the on disk ID is -1. uid/gid=ignore forces the in core ID to allways be used no matter what the on disk ID is. uid/gid=forget forces the on disk ID to always be written out as -1. The use of these options allows you to override ownerships on a disk or disable ownwership information from being written, allowing the media to be used portably between different computers and possibly different users without permissions issues that would require root to correct. Signed-off-by:
Phillip Susi <psusi@cfl.rr.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by:
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Andrew Morton authored
Fix the mm/mempolicy.c build for !CONFIG_HUGETLB_PAGE. Cc: Christoph Lameter <clameter@engr.sgi.com> Cc: Martin Bligh <mbligh@google.com> Signed-off-by:
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Pavel Machek authored
We're presently getting oopses because Bluetooth (and possibly other) drivers are calling core functions after things have been shut down. So rather than oopsing, let's drop a warning then take avoiding action, so the machine survives. Once all the sub-drivers are fixed up we can remove the take-avoiding-action part. Signed-off-by:
Pavel Machek <pavel@suse.cz> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Marcel Holtmann <marcel@holtmann.org> Signed-off-by:
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Mark Fasheh authored
We fixed this: arch/powerpc/platforms/pseries/eeh.c: In function `eeh_add_device_tree_late': arch/powerpc/platforms/pseries/eeh.c:901: warning: implicit declaration of function `eeh_add_device_late' arch/powerpc/platforms/pseries/eeh.c: At top level: arch/powerpc/platforms/pseries/eeh.c:918: error: conflicting types for 'eeh_add_device_late' arch/powerpc/platforms/pseries/eeh.c:901: error: previous implicit declaration of 'eeh_add_device_late' was here make[2]: *** [arch/powerpc/platforms/pseries/eeh.o] Error 1 But we forgot the !CONFIG_EEH stub. Signed-off-by:
Mark Fasheh <mark.fasheh@oracle.com> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by:
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Linus Torvalds authored
They aren't used (nor even really usable) outside of pipe.c anyway Signed-off-by: -
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6Linus Torvalds authored
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] mca recovery return value when no bus check [IA64] SGI SN drivers: don't report !sn2 hardware as an error [IA64] don't report !sn2 or !summit hardware as an error [IA64] gensparse_defconfig: turn on PNPACPI [IA64] Increase severity of MCA recovery messages
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Linus Torvalds authored
Instead of having a hard-to-read and confusing conditional in the caller, just make the slab order calculation handle this special case, since it's simple and obvious there. Signed-off-by:
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- Mar 08, 2006
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Linus Torvalds authored
* master.kernel.org:/home/rmk/linux-2.6-serial: [SERIAL] ip22zilog: Fix oops on runlevel change with serial console [SERIAL] Fix two bugs in parport_serial
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Linus Torvalds authored
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 3353/1: NAS100d: protect nas100d_power_exit() with machine_is_nas100d() [ARM] 3352/1: DSB required for the completion of a TLB maintenance operation
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Russ Anderson authored
When there is no bus check, the return code should be failure, not success. Signed-off-by:
Russ Anderson <(rja@sgi.com)> Signed-off-by:
Tony Luck <tony.luck@intel.com>
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Bjorn Helgaas authored
This stuff is all in the generic ia64 kernel, and the new initcall error reporting complains about them. Signed-off-by:
Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by:
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Bjorn Helgaas authored
This stuff is all in the generic ia64 kernel, and the new initcall error reporting complains about them. Signed-off-by:
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Bjorn Helgaas authored
Turn on CONFIG_PNPACPI. I recently removed 8250_acpi.c. All devices previously claimed by 8250_acpi.c should now be claimed by 8250_pnp.c. This depends on having CONFIG_PNPACPI so ACPI devices show up as PNP devices. All other ia64 defconfigs either have CONFIG_PNPACPI already, or don't have 8250 support turned on at all. Signed-off-by:
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Russ Anderson authored
The MCA recovery messages are currently KERN_DEBUG, so they don't show up in /var/log/messages (by default). Increase the severity to KERN_ERR, for the initial message (and also add the physical address to this message). Leave the successful isolation message as KERN_DEBUG, but increase the severity when isolation fails to KERN_CRIT. [Russ' patch made these all KERN_CRIT] Signed-off-by:
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Thomas Graf authored
The size of the skb carrying the netlink message is not equivalent to the length of the actual netlink message due to padding. ip_queue matches the length of the payload against the original packet size to determine if packet mangling is desired, due to the above wrong assumption arbitary packets may not be mangled depening on their original size. Signed-off-by:
Thomas Graf <tgraf@suug.ch> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alessandro Zummo authored
Patch from Alessandro Zummo nas100d_power_exit(void) gets some protection to avoid freeing an irq when it is not appropriate to do so. Signed-off-by:
Rod Whitby <rod@whitby.id.au> Signed-off-by:
Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk>
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Martin Michlmayr authored
Incorrect uart_write_wakeup() calls cause reference to a NULL tty pointer. This has been fixed in the sunsab and sunzilog serial drivers in October 2005. Update the ip22zilog, which is based on sunzilog, accordingly. Signed-off-by:
Martin Michlmayr <tbm@cyrius.com> Signed-off-by:
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Linus Torvalds authored
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: [TG3]: Add DMA address workaround
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Linus Torvalds authored
We don't do interruptible waits for the pipe mutex anywhere else any more either, so don't do it in fifo_open() either. Acked-by:
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- Mar 07, 2006
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Catalin Marinas authored
Patch from Catalin Marinas Chapter B2.7.3 in the latest ARM ARM (with v6 information) states that the completion of a TLB maintenance operation is only guaranteed by the execution of a DSB (Data Syncronization Barrier, formerly Data Write Barrier or Drain Write Buffer). Note that a DSB is only needed in the flush_tlb_kernel_* functions since the completion is guaranteed by a mode change (i.e. switching back to user mode) for the flush_tlb_user_* functions. Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com> Signed-off-by:
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Michael Chan authored
Add DMA workaround for chips that do not support full 64-bit DMA addresses. 5714, 5715, and 5780 chips only support DMA addresses less than 40 bits. On 64-bit systems with IOMMU, set the dma_mask to 40-bit so that pci_map_xxx() calls will map the DMA address below 40 bits if necessary. On 64-bit systems without IOMMU, set the dma_mask to 64-bit and check for DMA addresses exceeding the limit in tg3_start_xmit(). 5788 only supports 32-bit DMA so need to set the mask appropriately also. Thanks to Chris Elmquist at SGI for reporting and helping to debug the problem on 5714. Thanks to David Miller for explaining the HIGHMEM and DMA stuff. Signed-off-by:
Michael Chan <mchan@broadcom.com> Signed-off-by:
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Linus Torvalds authored
* 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband: IB/srp: Don't send task management commands after target removal
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Cornelia Huck authored
Rather than checking for some known failures, check positively for the success response code 0x0001 and return -EIO for unrecognized failure response codes. Signed-off-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Greg Smith <gsmith@nc.rr.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
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Bastian Blank authored
Fix matching of devmodel in modaliases. It breaks automatic loading of any dasd module. Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Acked-by:
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Benjamin Herrenschmidt authored
The Windfarm PID module lacks a licence, it should be GPL, here it is Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by:
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Nick Piggin authored
The point of the smaps "shared" is to count the number of pages that are mapped by more than one process, according to Mauricio Lin. However, smaps uses page_count for this, so it will return a false positive for every page that is mapped by just that one process, which is also in pagecache or swapcache. There are false positive situations for anonymous pages not in swapcache as well: - page reclaim, migration - get_user_pages (eg. direct-io, ptrace) Use page_mapcount instead, to count the number of mappings to the page. Use vm_normal_page so that weird things like /dev/mem aren't counted either. Signed-off-by:
Nick Piggin <npiggin@suse.de> Signed-off-by:
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Nick Piggin authored
smaps doesn't have a hugepage pagetable walker. Skip walking hugepage vmas. Signed-off-by:
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Peter Staubach authored
ramfs neglects to update the directory mtime and ctime fields when creating a new symbolic link. Ramfs was modified in 2.6.15 to update these fields when other types of entries are created. The symlink support is separate from that other support, so that change did not cover quite all of the possibilities. All of the directory content manipulation entry points now seem to be covered with respect to these time field updates. Signed-off-by:
Peter Staubach <staubach@redhat.com> Signed-off-by:
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Edgar Hucek authored
This patch makes the kernel bootable again on ia32 EFI systems. Signed-off-by:
Edgar Hucek <hostmaster@ed-soft.at> Cc: Matt Domsch <Matt_Domsch@dell.com> Cc: Zachary Amsden <zach@vmware.com> Signed-off-by:
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Christoph Lameter authored
Change the format of numa_maps to be more compact and contain additional information that is useful for managing and troubleshooting memory on a NUMA system. Numa_maps can now also support huge pages. Fixes: 1. More compact format. Only display fields if they contain additional information. 2. Always display information for all vmas. The old numa_maps did not display vma with no mapped entries. This was a bit confusing because page migration removes ptes for file backed vmas. After page migration a part of the vmas vanished. 3. Rename maxref to maxmap. This is the maximum mapcount of all the pages in a vma and may be used as an indicator as to how many processes may be using a certain vma. 4. Include the ability to scan over huge page vmas. New items shown: dirty Number of pages in a vma that have either the dirty bit set in the page_struct or in the pte. file=<filename> The file backing the pages if any stack Stack area heap Heap area huge Huge page area. The number of pages shows is the number of huge pages not the regular sized pages. swapcache Number of pages with swap references. Must be >0 in order to be shown. active Number of active pages. Only displayed if different from the number of pages mapped. writeback Number of pages under writeback. Only displayed if >0. Sample ouput of a process using huge pages: 00000000 default 2000000000000000 default file=/lib/ld-2.3.90.so mapped=13 mapmax=30 N0=13 2000000000044000 default file=/lib/ld-2.3.90.so anon=2 dirty=2 swapcache=2 N2=2 2000000000064000 default file=/lib/librt-2.3.90.so mapped=2 active=1 N1=1 N3=1 2000000000074000 default file=/lib/librt-2.3.90.so 2000000000080000 default file=/lib/librt-2.3.90.so anon=1 swapcache=1 N2=1 2000000000084000 default 2000000000088000 default file=/lib/libc-2.3.90.so mapped=52 mapmax=32 active=48 N0=52 20000000002bc000 default file=/lib/libc-2.3.90.so 20000000002c8000 default file=/lib/libc-2.3.90.so anon=3 dirty=2 swapcache=3 active=2 N1=1 N2=2 20000000002d4000 default anon=1 swapcache=1 N1=1 20000000002d8000 default file=/lib/libpthread-2.3.90.so mapped=8 mapmax=3 active=7 N2=2 N3=6 20000000002fc000 default file=/lib/libpthread-2.3.90.so 2000000000308000 default file=/lib/libpthread-2.3.90.so anon=1 dirty=1 swapcache=1 N1=1 200000000030c000 default anon=1 dirty=1 swapcache=1 N1=1 2000000000320000 default anon=1 dirty=1 N1=1 200000000071c000 default 2000000000720000 default anon=2 dirty=2 swapcache=1 N1=1 N2=1 2000000000f1c000 default 2000000000f20000 default anon=2 dirty=2 swapcache=1 active=1 N2=1 N3=1 200000000171c000 default 2000000001720000 default anon=1 dirty=1 swapcache=1 N1=1 2000000001b20000 default 2000000001b38000 default file=/lib/libgcc_s.so.1 mapped=2 N1=2 2000000001b48000 default file=/lib/libgcc_s.so.1 2000000001b54000 default file=/lib/libgcc_s.so.1 anon=1 dirty=1 active=0 N1=1 2000000001b58000 default file=/lib/libunwind.so.7.0.0 mapped=2 active=1 N1=2 2000000001b74000 default file=/lib/libunwind.so.7.0.0 2000000001b80000 default file=/lib/libunwind.so.7.0.0 2000000001b84000 default 4000000000000000 default file=/media/huge/test9 mapped=1 N1=1 6000000000000000 default file=/media/huge/test9 anon=1 dirty=1 active=0 N1=1 6000000000004000 default heap 607fffff7fffc000 default anon=1 dirty=1 swapcache=1 N2=1 607fffffff06c000 default stack anon=1 dirty=1 active=0 N1=1 8000000060000000 default file=/mnt/huge/test0 huge dirty=3 N1=3 8000000090000000 default file=/mnt/huge/test1 huge dirty=3 N0=1 N2=2 80000000c0000000 default file=/mnt/huge/test2 huge dirty=3 N1=1 N3=2 Signed-off-by:
Christoph Lameter <clameter@sgi.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by:
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Takashi Iwai authored
Fix bugs in error paths of snd_ctl_elem_add() - NULL reference - double free (already freed in snd_ctl_add()) Signed-off-by:
Takashi Iwai <tiwai@suse.de> Cc: Jaroslav Kysela <perex@suse.cz> Signed-off-by:
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Atsushi Nemoto authored
Add a compiler barrier so that we don't read jiffies before updating jiffies_64. Signed-off-by:
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Jack Steiner authored
Systems with extemely large numbers of nodes or cpus need to kmalloc structures larger than is currently supported. This patch increases the maximum supported size for very large systems. This patch should have no effect on current systems. (akpm: why not just use alloc_pages() for sysfs_cpus?) Signed-off-by:
Jack Steiner <steiner@sgi.com> Signed-off-by:
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KAMEZAWA Hiroyuki authored
include/linux/memory_hotplug.h:53: warning: 'struct page' declared inside parameter list (akpm: I tossed in a couple more possibly-needed-sometime struct decls too) Signed-off-by:
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by:
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