- 02 9月, 2006 3 次提交
-
-
由 NeilBrown 提交于
We need to be careful when referencing mirrors[i].rdev. It can disappear under us at various times. So: fix a couple of problem places. comment a couple of non-problem places move an 'atomic_add' which deferences rdev down a little way to some where where it is sure to not be NULL. Signed-off-by: NNeil Brown <neilb@suse.de> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Christoph Lameter 提交于
The ZVC counter update threshold is currently set to a fixed value of 32. This patch sets up the threshold depending on the number of processors and the sizes of the zones in the system. With the current threshold of 32, I was able to observe slight contention when more than 130-140 processors concurrently updated the counters. The contention vanished when I either increased the threshold to 64 or used Andrew's idea of overstepping the interval (see ZVC overstep patch). However, we saw contention again at 220-230 processors. So we need higher values for larger systems. But the current default is already a bit of an overkill for smaller systems. Some systems have tiny zones where precision matters. For example i386 and x86_64 have 16M DMA zones and either 900M ZONE_NORMAL or ZONE_DMA32. These are even present on SMP and NUMA systems. The patch here sets up a threshold based on the number of processors in the system and the size of the zone that these counters are used for. The threshold should grow logarithmically, so we use fls() as an easy approximation. Results of tests on a system with 1024 processors (4TB RAM) The following output is from a test allocating 1GB of memory concurrently on each processor (Forking the process. So contention on mmap_sem and the pte locks is not a factor): X MIN TYPE: CPUS WALL WALL SYS USER TOTCPU fork 1 0.552 0.552 0.540 0.012 0.552 fork 4 0.552 0.548 2.164 0.036 2.200 fork 16 0.564 0.548 8.812 0.164 8.976 fork 128 0.580 0.572 72.204 1.208 73.412 fork 256 1.300 0.660 310.400 2.160 312.560 fork 512 3.512 0.696 1526.836 4.816 1531.652 fork 1020 20.024 0.700 17243.176 6.688 17249.863 So a threshold of 32 is fine up to 128 processors. At 256 processors contention becomes a factor. Overstepping the counter (earlier patch) improves the numbers a bit: fork 4 0.552 0.548 2.164 0.040 2.204 fork 16 0.552 0.548 8.640 0.148 8.788 fork 128 0.556 0.548 69.676 0.956 70.632 fork 256 0.876 0.636 212.468 2.108 214.576 fork 512 2.276 0.672 997.324 4.260 1001.584 fork 1020 13.564 0.680 11586.436 6.088 11592.523 Still contention at 512 and 1020. Contention at 1020 is down by a third. 256 still has a slight bit of contention. After this patch the counter threshold will be set to 125 which reduces contention significantly: fork 128 0.560 0.548 69.776 0.932 70.708 fork 256 0.636 0.556 143.460 2.036 145.496 fork 512 0.640 0.548 284.244 4.236 288.480 fork 1020 1.500 0.588 1326.152 8.892 1335.044 [akpm@osdl.org: !SMP build fix] Signed-off-by: NChristoph Lameter <clameter@sgi.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Christoph Lameter 提交于
Increments and decrements are usually grouped rather than mixed. We can optimize the inc and dec functions for that case. Increment and decrement the counters by 50% more than the threshold in those cases and set the differential accordingly. This decreases the need to update the atomic counters. The idea came originally from Andrew Morton. The overstepping alone was sufficient to address the contention issue found when updating the global and the per zone counters from 160 processors. Also remove some code in dec_zone_page_state. Signed-off-by: NChristoph Lameter <clameter@sgi.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
- 01 9月, 2006 7 次提交
-
-
git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband由 Linus Torvalds 提交于
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: IB/mthca: Use IRQ safe locks to protect allocation bitmaps
-
由 Roland Dreier 提交于
It is supposed to be OK to call mthca_create_ah() and mthca_destroy_ah() from any context. However, for mem-full HCAs, these functions use the mthca_alloc() and mthca_free() bitmap helpers, and those helpers use non-IRQ-safe spin_lock() internally. Lockdep correctly warns that this could lead to a deadlock. Fix this by changing mthca_alloc() and mthca_free() to use spin_lock_irqsave(). Signed-off-by: NRoland Dreier <rolandd@cisco.com>
-
由 Wei Dong 提交于
When I tested Linux kernel 2.6.17.7 about statistics "ipFragFails",found that this counter couldn't increase correctly. The criteria is RFC2011: RFC2011 ipFragFails OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of IP datagrams that have been discarded because they needed to be fragmented at this entity but could not be, e.g., because their Don't Fragment flag was set." ::= { ip 18 } When I send big IP packet to a router with DF bit set to 1 which need to be fragmented, and router just sends an ICMP error message ICMP_FRAG_NEEDED but no increments for this counter(in the function ip_fragment). Signed-off-by: NWei Dong <weid@nanjing-fnst.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
-
由 Akinobu Mita 提交于
This patch limits the warning messages when socket allocation failures happen. It happens under memory pressure. Signed-off-by: NAkinobu Mita <mita@miraclelinux.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
-
由 YOSHIFUJI Hideaki 提交于
Bug noticed by Remi Denis-Courmont <rdenis@simphalempin.com>. Signed-off-by: NYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
-
git://git390.osdl.marist.edu/pub/scm/linux-2.6由 Linus Torvalds 提交于
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [S390] cio: unsolicited interrupts during sense pgid. [S390] cio: no path after machine check. [S390] cio: kernel stack overflow. [S390] dasd: fix device shutdown process. [S390] broken copy_in_user function.
-
由 Chris Wright 提交于
Commit 8c749327 ("i386: Remove alternative_smp") did not actually compile on x86 with CONFIG_SMP. This fixes the __build_read/write_lock helpers. I've boot tested on SMP. [ Andi: "Oops, I think that was a quilt unrefreshed patch. Sorry. I fixed those before testing, but then still send out the old patch." ] Signed-off-by: NChris Wright <chrisw@sous-sol.org> Cc: Gerd Hoffmann <kraxel@suse.de> Acked-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
- 31 8月, 2006 24 次提交
-
-
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc由 Linus Torvalds 提交于
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] Fix return value from memcpy [POWERPC] iseries: Define insw et al. so libata/ide will compile [POWERPC] Fix irq enable/disable in smp_generic_take_timebase [POWERPC] Fix problem with time not advancing on 32-bit platforms [POWERPC] Restore copyright notice in arch/powerpc/kernel/fpu.S [POWERPC] Fix up ibm_architecture_vec definition [POWERPC] Make OF irq map code detect more error cases [POWERPC] Support for "weird" MPICs and fixup mpc7448_hpc2 [POWERPC] Fix MPIC sense codes in documentation [POWERPC] Fix performance regression in IRQ radix tree locking [POWERPC] Add mpc7448hpc2 device tree source file [POWERPC] Add MPC8349E MDS device tree source file to arch/powerpc/boot/dts [POWERPC] modify mpc83xx platforms to use new IRQ layer [POWERPC] Adapt ipic driver to new host_ops interface, add set_irq_type to set IRQ sense [POWERPC] back up old school ipic.[hc] to arch/ppc [POWERPC] Use mpc8641hpcn PIC base address from dev tree. [POWERPC] Allow MPC8641 HPCN to build with CONFIG_PCI disabled too. [POWERPC] Fix powerpc 44x_mmu build [POWERPC] Remove flush_dcache_all export
-
由 Paul Mackerras 提交于
This fixes a hang on ppc32. The problem was that I was comparing a 32-bit quantity with a 64-bit quantity, and consequently time wasn't advancing. This makes us use a 64-bit quantity on all platforms, which ends up simplifying the code since we can now get rid of the tb_last_stamp variable (which actually fixes another bug that Ben H and I noticed while going carefully through the code). This works fine on my G4 tibook. Let me know how it goes on your machines. Acked-by: NOlaf Hering <olaf@aepfle.de> Acked-by: NMikael Pettersson <mikpe@it.uu.se> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Benjamin Herrenschmidt 提交于
The backlight changes that went in had a bug where they could cause the kernel to access an unitialized pointer when blanking if there is no backlight control on a machine. The bug affects atyfb, aty128fb, nvidiafb and rivafb. radeonfb seems to be ok. This fixes it. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Paul Mackerras 提交于
As pointed out by Herbert Xu <herbert@gondor.apana.org.au>, our memcpy implementation didn't return the destination pointer as its return value, and there is code in the kernel that expects that. This fixes it. Signed-off-by: NPaul Mackerras <paulus@samba.org>
-
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6由 Linus Torvalds 提交于
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] Increase default nodes shift to 10, nr_cpus to 1024 [IA64] remove redundant local_irq_save() calls from sn_sal.h [IA64] panic if topology_init kzalloc fails [IA64-SGI] Silent data corruption caused by XPC V2.
-
由 Roland Scheidegger 提交于
The radeon requires a VAP state flush when enabling/disabling vertex programs on the r200 cards. Signed-off-by: NDave Airlie <airlied@linux.ie> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Alan Cox 提交于
The following change from -mm is important to 2.6.18 (actually to 2.6.17 but its too late for that). This was contributed over three months ago by VIA to Bartlomiej and nothing happened. As a result the new chipset is now out and Linux won't run on it. By the time 2.6.18 is finalised this will be the defacto standard VIA chipset so support would be a good plan. Tested in -mm for a while, its essentially a PCI ident update but for the bridge chip because VIA do things in weird ways. Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Suleiman Souhlal 提交于
It's possible to get an invalid page fault in kernel mode when we try to write out segments from vsyscall32 when dumping core for a 32bit process if the vsyscall32 DSO is not mapped in its address space (which can happen if, for example, ulimit -v 100 is run). Signed-off-by: NSuleiman Souhlal <suleiman@google.com> Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Keith Owens 提交于
The values in init_tss.ist[] can change when an IST event occurs. Save the original IST values for checking stack addresses when debugging or doing stack traces. Signed-off-by: NKeith Owens <kaos@ocs.com.au> Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Andi Kleen 提交于
After all their only point is having them in user space. Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Andi Kleen 提交于
There was a bogus hunk from the genirq merge that essentially broke stack switching for hard interrupts. Remove it since it isn't needed. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Andi Kleen 提交于
After all their only point is having them in user space. On x86-64 they don't even work in kernel space. Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Andi Kleen 提交于
As a replacement for the earlier removal of the e820 MCFG check we blacklist the Intel SDV with the original BIOS bug that motivated that check. On those machines don't use MMCONFIG. This also adds a new pci=mmconf parameter to override the blacklist. Cc: Greg KH <gregkh@suse.de> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Andi Kleen 提交于
The .fill causes miscompilations with some binutils version. Instead just patch the lock prefix in the lock constructs. That is the majority of the cost and should be good enough. Cc: Gerd Hoffmann <kraxel@suse.de> Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Andi Kleen 提交于
The .fill causes miscompilations with some binutils version. Instead just patch the lock prefix in the lock constructs. That is the majority of the cost and should be good enough. Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Andi Kleen 提交于
Noticed by Jan Beulich. When the kernel was moved from 1MB to 2MB in 2.6.17 the kernel reservation code wasn't adjusted and it still reserved starting with 1MB. This means 1MB always were lost. This patch fixes this by reserving only starting with _text. Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Jan Beulich 提交于
The unwinder fallback logic still had potential for falling through to the legacy stack trace code without printing an indication (at once serving as a separator) of this. Further, the stack pointer retrieval for the fallback should be as restrictive as possible (in order to avoid having the legacy stack tracer try to access invalid memory). The patch tightens that, but this could certainly be further improved. Also making the call_trace command line option now conditional upon CONFIG_STACK_UNWIND (as it's meaningless otherwise). Signed-off-by: NJan Beulich <jbeulich@novell.com> Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Jan Beulich 提交于
By hard-coding the cpuid keys for alternative_smp() rather than using the symbolic constant it turned out that incorrect values were used on both i386 (0x68 instead of 0x69) and x86-64 (0x66 instead of 0x68). Signed-off-by: NJan Beulich <jbeulich@novell.com> Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Andi Kleen 提交于
One open question: Should this added push perhaps be made conditional upon CONFIG_STACK_UNWIND or CONFIG_UNWIND_INFO? [AK: not needed, these are all very slow paths] Signed-off-by: NJan Beulich <jbeulich@novell.com> Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Andi Kleen 提交于
One open question: Should these added pushes perhaps be made conditional upon CONFIG_STACK_UNWIND or CONFIG_UNWIND_INFO? [AK: Not needed -- these are all very slow paths] Signed-off-by: NJan Beulich <jbeulich@novell.com> Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Andi Kleen 提交于
The check for the MCFG table being reserved in the e820 map was originally added to detect a broken BIOS in a preproduction Intel SDV. However it also breaks the Apple x86 Macs, which can't supply this properly, but need a working MCFG. With this patch they wouldn't use the MCFG and not work. After some discussion I think it's best to remove the heuristic again. It also failed on some other boxes (although it didn't cause much problems there because old style port access for PCI config space still works as fallback), but the preproduction SDVs can just use pci=nommcfg. Supporting production machines properly is more important. Edgar Hucek did all the debugging work. Cc: Arjan van de Ven <arjan@infradead.org> Cc: Edgar Hucek <hostmaster@ed-soft.at> Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Andi Kleen 提交于
Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
-
由 Linus Torvalds 提交于
* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [SUNLANCE]: Fix probing problem. [SPARC64]: Fix X server hangs due to large pages.
-
由 Linus Torvalds 提交于
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: [STRIP]: Fix neighbour table refcount leak. [IPV6]: ipv6_add_addr should install dstentry earlier [NETLINK]: Call panic if nl_table allocation fails [TCP]: Two RFC3465 Appropriate Byte Count fixes. [IPV6]: SNMPv2 "ipv6IfStatsInAddrErrors" counter error [E100]: Add module option to ignore bad EEPROM checksums. [SCTP]: Fix sctp_primitive_ABORT() call in sctp_close().
-
- 30 8月, 2006 6 次提交
-
-
由 Stefan Bader 提交于
Calls to set a device online with path grouping may get stuck in some cases because certain device conditions where discarded after unsolicited interrupts. Check subchannel activity after unsolicited interrupts and retry the operation if the subchannel is idle. Signed-off-by: NStefan Bader <shbader@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Peter Oberparleiter 提交于
Devices enter no-path state after disabling a channel path via the SE even though another path has been reenabled at the SE. The devices are set into no-path state before triggering path verification even though other paths may have become available. To fix this trigger path verification before setting a device into no-path state. Signed-off-by: NPeter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Heiko Carstens 提交于
Use different kind of assignment to make sure gcc doesn't create code that creates temp variables on the stack, assigns values to it and copies the content of the whole temp variable to the destination. This reduces stack usage of e.g. ccwgroup_driver_register from 976 to 48 bytes instead. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Horst Hummel 提交于
Fix clear_IO handling (need to wait for interrupt) and introduced error-handling in shutdown processing. Signed-off-by: NHorst Hummel <horst.hummel@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Martin Schwidefsky 提交于
The copy_in_user primitive does not work as advertised. If the source and target area are available copy_in_user copies one byte too much. If one of the memory areas is not available it does not copy as much data as it can, but up to 257 bytes less. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
-
由 Stephen Rothwell 提交于
These are build fixes that enable (for example) libata and the ide code to actually build on iSeries. The associated hardware will never be supported on legacy iSeries, so the code paths don't actually need to work, but it is useful (especially for a combined kernel) if the code can build. Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NPaul Mackerras <paulus@samba.org>
-