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2009-05-11x86: document new bzImage fieldsH. Peter Anvin
Document the new bzImage fields for kernel memory placement. [ Impact: adds documentation ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-11x86, boot: make kernel_alignment adjustable; new bzImage fieldsH. Peter Anvin
Make the kernel_alignment field adjustable; this allows us to set it to a large value (intended to be 16 MB to avoid ZONE_DMA contention, memory holes and other weirdness) while a smart bootloader can still force a loading at a lesser alignment if absolutely necessary. Also export pref_address (preferred loading address, corresponding to the link-time address) and init_size, the total amount of linear memory the kernel will require during initialization. [ Impact: allows better kernel placement, gives bootloader more info ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-11x86, boot: remove dead code from boot/compressed/head_*.SH. Peter Anvin
Remove a couple of lines of dead code from arch/x86/boot/compressed/head_*.S; all of these update registers that are dead in the current code. [ Impact: cleanup ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-11x86, boot: use LOAD_PHYSICAL_ADDR on 64 bitsH. Peter Anvin
Use LOAD_PHYSICAL_ADDR instead of CONFIG_PHYSICAL_START in the 64-bit decompression code, for equivalence with the 32-bit code. [ Impact: cleanup, increases code similarity ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-11x86, boot: make symbols from the main vmlinux availableH. Peter Anvin
Make symbols from the main vmlinux, as opposed to just compressed/vmlinux, available to header.S. Also, export a few additional symbols. This will be used in a subsequent patch to export the total memory footprint of the kernel. [ Impact: enable future enhancement ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-08x86, boot: determine compressed code offset at compile timeH. Peter Anvin
Determine the compressed code offset (from the kernel runtime address) at compile time. This allows some minor optimizations in arch/x86/boot/compressed/head_*.S, but more importantly it makes this value available to the build process, which will enable a future patch to export the necessary linear memory footprint into the bzImage header. [ Impact: cleanup, future patch enabling ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-08x86, boot: use appropriate rep string for move and clearH. Peter Anvin
In the pre-decompression code, use the appropriate largest possible rep movs and rep stos to move code and clear bss, respectively. For reverse copy, do note that the initial values are supposed to be the address of the first (highest) copy datum, not one byte beyond the end of the buffer. rep strings are not necessarily the fastest way to perform these operations on all current processors, but are likely to be in the future, and perhaps more importantly, we want to encourage the architecturally right thing to do here. This also fixes a couple of trivial inefficiencies on 64 bits. [ Impact: trivial performance enhancement, increase code similarity ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-08x86, boot: zero EFLAGS on 32 bitsH. Peter Anvin
The 64-bit code already clears EFLAGS as soon as it has a stack. This seems like a reasonable precaution, so do it on 32 bits as well. [ Impact: extra paranoia ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-08x86, boot: set up the decompression stack as early as possibleH. Peter Anvin
Set up the decompression stack as soon as we know where it needs to go. That way we have a full-service stack as soon as possible, rather than relying on the BP_scratch field. Note that the stack does need to be empty during bss zeroing (or else the stack needs to be moved out of the bss segment, which is also an option.) [ Impact: cleanup, minor paranoia ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-08x86, boot: straighten out ranges to copy/zero in compressed/head*.SH. Peter Anvin
Both on 32 and 64 bits, we copy all the way up to the end of bss, except that on 64 bits there is a hack to avoid copying on top of the page tables. There is no point in copying bss at all, especially since we are just about to zero it all anyway. To clean up and unify the handling, we now do: - copy from startup_32 to _bss. - zero from _bss to _ebss. - the _ebss symbol is aligned to an 8-byte boundary. - the page tables are moved to a separate section. Use _bss as the copy endpoint since _edata may be misaligned. [ Impact: cleanup, trivial performance improvement ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-08x86, boot: stylistic cleanups for boot/compressed/head_64.SH. Peter Anvin
Clean up style issues in arch/x86/boot/compressed/head_64.S. This file had a lot fewer style issues than its 32-bit cousin, but the ones it has are worth fixing, especially since it makes the two files more similar. [ Impact: cleanup, no object code change ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-08x86, boot: stylistic cleanups for boot/compressed/head_32.SH. Peter Anvin
Reformat arch/x86/boot/compressed/head_32.S to be closer to currently preferred kernel assembly style, that is: - opcode and operand separated by tab - operands separated by ", " - C-style comments This also makes it more similar to head_64.S. [ Impact: cleanup, no object code change ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-08x86, boot: use BP_scratch in arch/x86/boot/compressed/head_*.SH. Peter Anvin
Use the BP_scratch symbol from asm-offsets.h instead of hard-coding the location. [ Impact: cleanup ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-08x86, boot: follow standard Kbuild style for compression suffixH. Peter Anvin
When generating the compression suffix in arch/x86/boot/compressed/Makefile, follow standard Kbuild conventions, that is: - Use a dash not underscore before y/m/n endings - Use := whenever possible. Requested-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-08x86, boot: simplify arch/x86/boot/compressed/MakefileH. Peter Anvin
Simplify the arch/x86/boot/compressed/Makefile, by using the new capability of specifying multiple inputs to a compressor, and the CONFIG_X86_NEED_RELOCS Kconfig symbol. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Acked-by: Sam Ravnborg <sam@ravnborg.org>
2009-05-08x86: add a Kconfig symbol for when relocations are neededH. Peter Anvin
We only need to build relocations when we are building a 32-bit relocatable kernel. Rather than unnecessarily complicating the Makefiles, make an explicit Kbuild symbol for this. [ Impact: permits future cleanup ] Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Sam Ravnborg <sam@ravnborg.org>
2009-05-08kbuild: allow compressors (gzip, bzip2, lzma) to take multiple inputsH. Peter Anvin
Allow the compression commands in Kbuild (i.e. gzip, bzip2, lzma) to take multiple input files and emit the concatenated compressed output. This avoids an intermediate step when a kernel image is built from multiple components, such as the relocatable x86-32 kernel. Sam Ravnborg integrated the bin_size script into the Makefile. [ Impact: new build feature, not yet used ] Signed-off-by: H. Peter Anvin <hpa@zytor.com> Acked-by: Sam Ravnborg <sam@ravnborg.org>
2009-05-08x86, boot: align the .bss section in the decompressorH. Peter Anvin
Aligning the .bss section makes it trivial to use large operation sizes for moving the initialized sections and clearing the .bss. The alignment chosen (L1 cache) is somewhat arbitrary, but should be large enough to avoid all known performance traps and small enough to not cause troubles. [ Impact: trivial performance enhancement, future patch prep ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-04-30x86: boot/compressed/vmlinux.lds.S: fix build of bzImage with 64 bit compilerSam Ravnborg
Jesper reported that he saw following build issue: > ld:arch/x86/boot/compressed/vmlinux.lds:9: syntax error > make[2]: *** [arch/x86/boot/compressed/vmlinux] Error 1 > make[1]: *** [arch/x86/boot/compressed/vmlinux] Error 2 > make: *** [bzImage] Error 2 CPP defines the symbol "i386" to "1". Undefine this to fix it. [ Impact: build fix with certain tool chains ] Reported-by: Jesper Dangaard Brouer <jdb@comx.dk> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <alpine.LFD.2.00.0904260958190.3101@localhost.localdomain> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: fix relocatable symbolsIngo Molnar
__init_begin/_end symbols should be inside sections as well, otherwise the relocatable kernel gets confused when freeing init sections in the wrong place. [ Impact: fix bootup crash ] Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <20090429105056.GA28720@uranus.ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: add copyrightIngo Molnar
Acked-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-2-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: unify remaining partsSam Ravnborg
32 bit: - explicit page align .bss - move ALING() out of .brk output section - discard *(.eh_frame) 64 bit: - move ALIGN() out of .bss output section - move ALIGN() out of .brk output section - use a dedicated section to define _end [ Impact: unify and fix section alignments in linker script ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-13-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: unify percpuSam Ravnborg
32 bit: - move __init_end outside the .bss output section It really did not belong in there [ Impact: 64-bit: cleanup, 32-bit: refactor linker script ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-12-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: unify .exit.* and .init.ramfsSam Ravnborg
[ Impact: cleanup ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-11-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: unify parainstructionsSam Ravnborg
32 bit: - increase alignment from 4 to 8 for .parainstructions - increase alignment from 4 to 8 for .altinstructions 64 bit: - move ALIGN() outside output section for .altinstructions None of the above should result in any functional change. [ Impact: refactor and unify linker script ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-10-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: unify first part of initdataSam Ravnborg
32-bit: - Move definition of __init_begin outside output_section because it covers more than one section - Move ALIGN() for end-of-section inside .smp_locks output section. Same effect but the intent is better documented that we need both start and end aligned. 64-bit: - Move ALIGN() outside output section in .init.setup - Deleted unused __smp_alt_* symbols None of the above should result in any functional change. [ Impact: refactor and unify linker script ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-9-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: move vsyscall output sectionsSam Ravnborg
[ Impact: cleanup ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-8-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: unify data output sectionsSam Ravnborg
For 64 bit the following functional changes are introduced: - .data.page_aligned has moved - .data.cacheline_aligned has moved - .data.read_mostly has moved - ALIGN() moved out of output section for .data.cacheline_aligned - ALIGN() moved out of output section for .data.page_aligned Notice that 32 bit and 64 bit has different location of _edata. .data_nosave is 32 bit only as 64 bit is special due to PERCPU. [ Impact: 32-bit: cleanup, 64-bit: use 32-bit linker script ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-7-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: unify exception tableSam Ravnborg
[ Impact: cleanup ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-6-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: unify .text output sectionsSam Ravnborg
32 bit x86 had a dedicated .text.head output section, whereas 64 bit had it all in a single output section. In the unified version the dedicated .text.head output section was kept to have full control over the head code. 32 bit: - Moved definition of _stext to the linker script. The definition is located _after_ .text.page_aligned as this is what 32 bit did before. The ALIGN(8) was introduced so we hit the exact same address (on the tested config) before and after the move. I assume that it is a bug that _stext did not cover the .text.page_aligned section - if this is true it can be fixed in a follow-up patch (and the ugly ALIGN() can be dropped). [ Impact: 64-bit: cleanup, 32-bit: use the 64-bit linker script ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-5-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: unify start/end of SECTIONSSam Ravnborg
[ Impact: cleanup ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-4-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: unify PHDRSSam Ravnborg
PHDRS are not equal for the two - so use ifdefs to cover up for that. On the assumption that they may become equal the ifdef is inside the PHDRS definiton. [ Impact: cleanup ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-3-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86, vmlinux.lds: unify header/footerSam Ravnborg
Merge everything except PHDRS and SECTIONS into vmlinux.lds.S. [ Impact: cleanup ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-2-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29x86: beautify vmlinux_32.lds.SSam Ravnborg
Beautify vmlinux_32.lds.S: - Use tabs for indent - Located curly braces like in C code - Rearranged a few comments To see actual differences use "git diff -b" which ignore 'whitespace' changes. The beautification is done to prepare a unification of the _32 and _64 variants of the linker scripts. [ Impact: cleanup ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-1-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-27x86: unify arch/x86/boot/compressed/vmlinux_*.ldsLinus Torvalds
Look at the: diff -u arch/x86/boot/compressed/vmlinux_*.lds output and realize that they're basially exactly the same except for trivial naming differences, and the fact that the 64-bit version has a "pgtable" thing. So unify them. There's some trivial cleanup there (make the output format a Kconfig thing rather than doing #ifdef's for it, and unify both 32-bit and 64-bit BSS end to "_ebss", where 32-bit used to use the traditional "_end"), but other than that it's really very mindless and straigt conversion. For example, I think we should aim to remove "startup_32" vs "startup_64", and just call it "startup", and get rid of one more difference. I didn't do that. Also, notice the comment in the unified vmlinux.lds.S talks about "head_64" and "startup_32" which is an odd and incorrect mix, but that was actually what the old 64-bit only lds file had, so the confusion isn't new, and now that mixing is arguably more accurate thanks to the vmlinux.lds.S file being shared between the two cases ;) [ Impact: cleanup, unification ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-27x86: beautify vmlinux_64.lds.SSam Ravnborg
Beautify vmlinux_64.lds.S: - Use tabs for indent - Located curly braces like in C code - Rearranged a few comments There is no functional changes in this patch The beautification is done to prepare a unification of the _32 and the _64 variants of the linker scripts. [ Impact: cleanup ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <20090426210742.GA3464@uranus.ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-16x86: standardize Kbuild rulesSam Ravnborg
Introducing this Kbuild file allow us to: make arch/x86/ And thus building all the core part of x86. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Jaswinder Singh Rajput <jaswinder@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-15Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: ALSA: hda - Fix the cmd cache keys for amp verbs ALSA: add missing definitions(letters) to HD-Audio.txt ALSA: hda - Add quirk mask for Fujitsu Amilo laptops with ALC883 [ALSA] intel8x0: add one retry to the ac97_clock measurement routine [ALSA] intel8x0: fix wrong conditions in ac97_clock measure routine ALSA: hda - Avoid call of snd_jack_report at release ALSA: add private_data to struct snd_jack ALSA: snd-usb-caiaq: rename files to remove redundant information in file pathes ALSA: snd-usb-caiaq: clean up header includes ALSA: sound/pci: use memdup_user() ALSA: sound/usb: use memdup_user() ALSA: sound/isa: use memdup_user() ALSA: sound/core: use memdup_user() [ALSA] intel8x0: do not use zero value from PICB register [ALSA] intel8x0: an attempt to make ac97_clock measurement more reliable [ALSA] pcm-midlevel: Add more strict buffer position checks based on jiffies [ALSA] hda_intel: fix unexpected ring buffer positions ASoC: Disable S3C64xx support in Kconfig ASoC: magician: remove un-necessary #include of pxa-regs.h and hardware.h
2009-04-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixesLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes: GFS2: Use DEFINE_SPINLOCK GFS2: cleanup file_operations mess GFS2: Move umount flush rwsem GFS2: Fix symlink creation race GFS2: Make quotad's waiting interruptible
2009-04-15Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: (28 commits) cfq-iosched: add close cooperator code cfq-iosched: log responsible 'cfqq' in idle timer arm cfq-iosched: tweak kick logic a bit more cfq-iosched: no need to save interrupts in cfq_kick_queue() brd: fix cacheflushing brd: support barriers swap: Remove code handling bio_alloc failure with __GFP_WAIT gfs2: Remove code handling bio_alloc failure with __GFP_WAIT ext4: Remove code handling bio_alloc failure with __GFP_WAIT dio: Remove code handling bio_alloc failure with __GFP_WAIT block: Remove code handling bio_alloc failure with __GFP_WAIT bio: add documentation to bio_alloc() splice: add helpers for locking pipe inode splice: remove generic_file_splice_write_nolock() ocfs2: fix i_mutex locking in ocfs2_splice_to_file() splice: fix i_mutex locking in generic_splice_write() splice: remove i_mutex locking in splice_from_pipe() splice: split up __splice_from_pipe() block: fix SG_IO to return a proper error value cfq-iosched: don't delay queue kick for a merged request ...
2009-04-15Merge branch 'topic/hda' into for-linusTakashi Iwai
* topic/hda: ALSA: hda - Fix the cmd cache keys for amp verbs ALSA: add missing definitions(letters) to HD-Audio.txt
2009-04-15ALSA: hda - Fix the cmd cache keys for amp verbsTakashi Iwai
Fix the key value generation for get/set amp verbs. The upper bits of the parameter have to be combined with the verb value to be unique for each direction/index of amp access. This fixes the resume problem on some hardwares like Macbook after the channel mode is changed. Tested-by: Johannes Berg <johannes@sipsolutions.net> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-04-15Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: powerpc: pseries/dtl.c should include asm/firmware.h powerpc: Fix data-corrupting bug in __futex_atomic_op powerpc/pseries: Set error_state to pci_channel_io_normal in eeh_report_reset() powerpc: Allow 256kB pages with SHMEM powerpc: Document new FSL I2C bindings and cleanup powerpc/mm: Fix compile warning powerpc/85xx: TQM8548: update defconfig powerpc/85xx: TQM8548: use proper phy-handles for enet2 and enet3 powerpc/85xx: TQM85xx: correct address of LM75 I2C device nodes powerpc: Add support for early tlbilx opcode powerpc: Fix tlbilx opcode
2009-04-15acpi-cpufreq: fix 'smp_call_function_many()' confusionLinus Torvalds
It turns out that 'smp_call_function_many()' doesn't work at all like 'smp_call_function_single()', and my change to Andrew's patch to use it rather than a loop over all CPU's acpi-cpufreq doesn't work. My bad. 'smp_call_function_many()' has two "features" (aka "documented bugs"): (a) it needs to be called with preemption disabled, because it uses smp_processor_id() without guarding the CPU lookup with 'get_cpu()' and 'put_cpu()' like the 'single' variant does. (b) even if the current CPU is part of the CPU mask, it won't do the call on that CPU. Still, we're better off trying to use 'smp_call_function_many()' than looping over CPU's, since it at least in theory allows us to use a broadcast IPI and do it all in parallel. So let's just work around the silly semantic bugs in that function. Reported-and-tested-by: Ali Gholami Rudi <ali@rudi.ir> Cc: Ingo Molnar <mingo@elte.hu> Cc: Andrew Morton <akpm@linux-foundation.org>, Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Dave Jones <davej@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-15cfq-iosched: add close cooperator codeJens Axboe
If we have processes that are working in close proximity to each other on disk, we don't want to idle wait. Instead allow the close process to issue a request, getting better aggregate bandwidth. The anticipatory scheduler has similar checks, noop and deadline do not need it since they don't care about process <-> io mappings. The code for CFQ is a little more involved though, since we split request queues into per-process contexts. This fixes a performance problem with eg dump(8), since it uses several processes in some silly attempt to speed IO up. Even if dump(8) isn't really a valid case (it should be fixed by using CLONE_IO), there are other cases where we see close processes and where idling ends up hurting performance. Credit goes to Jeff Moyer <jmoyer@redhat.com> for writing the initial implementation. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-04-15cfq-iosched: log responsible 'cfqq' in idle timer armJens Axboe
Makes it easier to read the traces. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-04-15cfq-iosched: tweak kick logic a bit moreJens Axboe
We only kick the dispatch for an idling queue, if we think it's a (somewhat) fully merged request. Also allow a kick if we have other busy queues in the system, since we don't want to risk waiting for a potential merge in that case. It's better to get some work done and proceed. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-04-15cfq-iosched: no need to save interrupts in cfq_kick_queue()Jens Axboe
It's called from the workqueue handlers from process context, so we always have irqs enabled when entered. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-04-15brd: fix cacheflushingNick Piggin
brd is missing a flush_dcache_page. On 2nd thoughts, perhaps it is the pagecache's responsibility to flush user virtual aliases (the driver of course should flush kernel virtual mappings)... but anyway, there already exists cache flushing for one direction of transfer, so we should add the other. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-04-15brd: support barriersNick Piggin
brd is always ordered (not that it matters, as it is defined not to survive when the system goes down). So tell the block layer it is ordered, which might be of help with testing filesystems. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>