- 07 3月, 2010 3 次提交
-
-
由 FUJITA Tomonori 提交于
No architecture except for frv has pci_dma_sync_single() and pci_dma_sync_sg(). The APIs are deprecated. Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NDavid Howells <dhowells@redhat.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
由 Rik van Riel 提交于
The old anon_vma code can lead to scalability issues with heavily forking workloads. Specifically, each anon_vma will be shared between the parent process and all its child processes. In a workload with 1000 child processes and a VMA with 1000 anonymous pages per process that get COWed, this leads to a system with a million anonymous pages in the same anon_vma, each of which is mapped in just one of the 1000 processes. However, the current rmap code needs to walk them all, leading to O(N) scanning complexity for each page. This can result in systems where one CPU is walking the page tables of 1000 processes in page_referenced_one, while all other CPUs are stuck on the anon_vma lock. This leads to catastrophic failure for a benchmark like AIM7, where the total number of processes can reach in the tens of thousands. Real workloads are still a factor 10 less process intensive than AIM7, but they are catching up. This patch changes the way anon_vmas and VMAs are linked, which allows us to associate multiple anon_vmas with a VMA. At fork time, each child process gets its own anon_vmas, in which its COWed pages will be instantiated. The parents' anon_vma is also linked to the VMA, because non-COWed pages could be present in any of the children. This reduces rmap scanning complexity to O(1) for the pages of the 1000 child processes, with O(N) complexity for at most 1/N pages in the system. This reduces the average scanning cost in heavily forking workloads from O(N) to 2. The only real complexity in this patch stems from the fact that linking a VMA to anon_vmas now involves memory allocations. This means vma_adjust can fail, if it needs to attach a VMA to anon_vma structures. This in turn means error handling needs to be added to the calling functions. A second source of complexity is that, because there can be multiple anon_vmas, the anon_vma linking in vma_adjust can no longer be done under "the" anon_vma lock. To prevent the rmap code from walking up an incomplete VMA, this patch introduces the VM_LOCK_RMAP VMA flag. This bit flag uses the same slot as the NOMMU VM_MAPPED_COPY, with an ifdef in mm.h to make sure it is impossible to compile a kernel that needs both symbolic values for the same bitflag. Some test results: Without the anon_vma changes, when AIM7 hits around 9.7k users (on a test box with 16GB RAM and not quite enough IO), the system ends up running >99% in system time, with every CPU on the same anon_vma lock in the pageout code. With these changes, AIM7 hits the cross-over point around 29.7k users. This happens with ~99% IO wait time, there never seems to be any spike in system time. The anon_vma lock contention appears to be resolved. [akpm@linux-foundation.org: cleanups] Signed-off-by: NRik van Riel <riel@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
由 Akinobu Mita 提交于
Rename for_each_bit to for_each_set_bit in the kernel source tree. To permit for_each_clear_bit(), should that ever be added. The patch includes a macro to map the old for_each_bit() onto the new for_each_set_bit(). This is a (very) temporary thing to ease the migration. [akpm@linux-foundation.org: add temporary for_each_bit()] Suggested-by: NAlexey Dobriyan <adobriyan@gmail.com> Suggested-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Russell King <rmk@arm.linux.org.uk> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Artem Bityutskiy <dedekind@infradead.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
- 06 3月, 2010 1 次提交
-
-
由 Randy Dunlap 提交于
Fix missing kernel-doc notation in mtrr/main.c: Warning(arch/x86/kernel/cpu/mtrr/main.c:152): No description found for parameter 'info' Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
- 04 3月, 2010 5 次提交
-
-
由 Masami Hiramatsu 提交于
Fix stop_machine_text_poke() to issue smp_mb() before exiting waiting loop, and use cpu_relax() for waiting. Changes in v2: - Don't use ACCESS_ONCE(). Signed-off-by: NMasami Hiramatsu <mhiramat@redhat.com> Acked-by: NMathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Jason Baron <jbaron@redhat.com> LKML-Reference: <20100304033850.3819.74590.stgit@localhost6.localdomain6> Signed-off-by: NIngo Molnar <mingo@elte.hu>
-
由 Al Viro 提交于
->kill_sb() will be called after any failure exit, so no need to duplicate what it can do. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
-
由 Al Viro 提交于
... instead of mixing FMODE_ and O_ Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
-
由 David S. Miller 提交于
If we do something like try to print to the OF console from an NMI while we're already in OpenFirmware, we'll deadlock on the spinlock. Use a raw spinlock and disable NMIs when we take it. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
-
由 David S. Miller 提交于
People should be using the perf events interfaces, and the way these system call facilities used the %pcr conflicts with the usage of the NMI watchdog and perf events. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
-
- 03 3月, 2010 8 次提交
-
-
由 David S. Miller 提交于
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
-
由 David S. Miller 提交于
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
-
由 Eirik Aanonsen 提交于
Adding vbus_pin_inverted so that the usb detect pin can be active high or low depending on HW implementation also replaced the gpio_get_value(udc->vbus_pin); with a call to vbus_is_present(udc); This allows the driver to be loaded and save about 0,15W on the consumption. Signed-off-by: NEirik Aanonsen <eaa@wprmedical.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
-
由 Felipe Balbi 提交于
trivial patch enabling g_nokia on rx51_defconfig. Signed-off-by: NFelipe Balbi <felipe.balbi@nokia.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
-
由 Martin Fuzzey 提交于
Signed-off-by: NMartin Fuzzey <mfuzzey@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
-
由 Martin Fuzzey 提交于
Also fixes tab/space issue causing checkpatch to complain. Signed-off-by: NMartin Fuzzey <mfuzzey@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
-
由 Martin Fuzzey 提交于
This driver is a Full / Low speed only USB host for the i.MX21. Signed-off-by: NMartin Fuzzey <mfuzzey@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
-
由 Linus Walleij 提交于
This centralize some spread-out initialization of descriptors into one function and cleans up the error paths. Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
-
- 02 3月, 2010 5 次提交
-
-
由 Sandeep Paulraj 提交于
The DM365 Spectrum Digital EVM comes with an EEPROM connected to SPI0. This patch adds support for the SPI EEPROM. Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com> Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
-
由 Sandeep Paulraj 提交于
This patch adds SPI init for DM365. It does the following 1) Initializes SPI0 2) Defines resources to be used by SPI0 3) Adds platform data for SPI0 Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com> Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
-
由 Sandeep Paulraj 提交于
This patch does the following 1) Minor change to the SPI clocks making it similar to DM365. 2) Changing the interrupt used by SPI0 3) Adding EDMA resources that can be used by SPI0 4) Adding platform specific data. Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com> Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
-
由 Sandeep Paulraj 提交于
This patch adds "spi.h" header file that will be used by board and architecture specific code. Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com> Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
-
由 Kevin Hilman 提交于
Remove unneeded 'struct davinci_clk' wrapper around 'struct clk_lookup' and use clk_lookup directly. Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
-
- 01 3月, 2010 18 次提交
-
-
由 Jan Kiszka 提交于
This marks the guest single-step API improvement of 94fe45da and 91586a3b with a capability flag to allow reliable detection by user space. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Cc: stable@kernel.org (2.6.33) Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Jan Kiszka 提交于
We intercept #BP while in guest debugging mode. As VM exits due to intercepted exceptions do not necessarily come with valid idt_vectoring, we have to update event_exit_inst_len explicitly in such cases. At least in the absence of migration, this ensures that re-injections of #BP will find and use the correct instruction length. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Cc: stable@kernel.org (2.6.32, 2.6.33) Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Takuya Yoshikawa 提交于
This patch fixes emulate_syscall(), emulate_sysenter() and emulate_sysexit() to handle injected faults properly. Even though original code injects faults in these functions, we cannot handle these unless we use the different return value from the UNHANDLEABLE case. So this patch use X86EMUL_* codes instead of -1 and 0 and makes x86_emulate_insn() to handle these propagated faults. Be sure that, in x86_emulate_insn(), goto cannot_emulate and goto done with rc equals X86EMUL_UNHANDLEABLE have same effect. Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Gleb Natapov 提交于
Add proper error and permission checking. This patch also change task switching code to load segment selectors before segment descriptors, like SDM requires, otherwise permission checking during segment descriptor loading will be incorrect. Cc: stable@kernel.org (2.6.33, 2.6.32) Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Takuya Yoshikawa 提交于
This patch injects page fault when reading descriptor in load_guest_segment_descriptor() fails with FAULT. Effects of this injection: This function is used by kvm_load_segment_descriptor() which is necessary for the following instructions: - mov seg,r/m16 - jmp far - pop ?s This patch makes it possible to emulate the page faults generated by these instructions. But be sure that unless we change the kvm_load_segment_descriptor()'s ret value propagation this patch has no effect. Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Gleb Natapov 提交于
Inject #UD if guest attempts to do so. This is in accordance to Intel SDM. Cc: stable@kernel.org (2.6.33, 2.6.32) Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Thomas Gleixner 提交于
The i8254/i8259 locks need to be real spinlocks on preempt-rt. Convert them to raw_spinlock. No change for !RT kernels. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Gleb Natapov 提交于
Instructions with opcode 82 are not valid in 64 bit mode. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Wei Yongjun 提交于
Just remove redundant semicolon. Signed-off-by: NWei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Gleb Natapov 提交于
Instructions which are not allowed to have LOCK prefix should generate #UD if one is used. [avi: fold opcode 82 fix from another patch] Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Gleb Natapov 提交于
Add CPL checking in case emulator is tricked into emulating privilege instruction from userspace. Signed-off-by: NGleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Gleb Natapov 提交于
POPF behaves differently depending on current CPU mode. Emulate correct logic to prevent guest from changing flags that it can't change otherwise. Signed-off-by: NGleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Gleb Natapov 提交于
Make emulator check that vcpu is allowed to execute IN, INS, OUT, OUTS, CLI, STI. Signed-off-by: NGleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Gleb Natapov 提交于
Currently when x86 emulator needs to access memory, page walk is done with broadest permission possible, so if emulated instruction was executed by userspace process it can still access kernel memory. Fix that by providing correct memory access to page walker during emulation. Signed-off-by: NGleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Gleb Natapov 提交于
For some instructions CPU behaves differently for real-mode and virtual 8086. Let emulator know which mode cpu is in, so it will not poke into vcpu state directly. Signed-off-by: NGleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Gleb Natapov 提交于
Use groups mechanism to decode 0F C7 instructions. Signed-off-by: NGleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Gleb Natapov 提交于
Use groups mechanism to decode 0F BA instructions. Signed-off-by: NGleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Liu Yu 提交于
Old method prematurely sets ESR and DEAR. Move this part after we decide to inject interrupt, which is more like hardware behave. Signed-off-by: NLiu Yu <yu.liu@freescale.com> Acked-by: NHollis Blanchard <hollis@penguinppc.org> Acked-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
-