- 01 Aug, 2003 15 commits
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Andrew Morton authored
From: Alex Tomas <bzzz@tmi.comex.ru> ext3_get_inode_loc() read inode's block only if: 1) this inode has no copy in memory 2) inode's block has another valid inode(s) this optimization allows to avoid needless I/O in two cases: 1) just allocated inode is first valid in the inode's block 2) kernel wants to write inode, but buffer in which inode belongs to gets freed by VM
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Andrew Morton authored
Since Jens changed the block layer to fail readahead if the queue has no requests free, a few changes suggest themselves. - It's a bit silly to go and alocate a bunch of pages, build BIOs for them, submit the IO only to have it fail, forcing us to free the pages again. So the patch changes do_page_cache_readahead() to peek at the queue's read_congested state. If the queue is read-congested we abandon the entire readahead up-front without doing all that work. - If the queue is not read-congested, we go ahead and do the readahead, after having set PF_READAHEAD. The backing_dev_info's read-congested threshold cuts in when 7/8ths of the queue's requests are in flight, so it is probable that the readahead abandonment code in __make_request will now almost never trigger. - The above changes make do_page_cache_readahead() "unreliable", in that it may do nothing at all. However there are some system calls: - fadvise(POSIX_FADV_WILLNEED) - madvise(MADV_WILLNEED) - sys_readahead() In which the user has an expectation that the kernel will actually perform the IO. So the patch creates a new "force_page_cache_readahead()" which will perform the IO regardless of the queue's congestion state. Arguably, this is the wrong thing to do: even though the application requested readahead it could be that the kernel _should_ abandon the user's request because the disk is so busy. I don't know. But for now, let's keep the above syscalls behaviour unchanged. It is trivial to switch back to do_page_cache_readahead() later.
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Andrew Morton authored
Since Jens added the pagecache readahead support in the block layer we've been getting bogus IO error messages from buffer.c due to __make_request calling end_io against a non-uptodate buffer. We can just use PF_READAHEAD to shut that up. But really, we shouldn't even have allocated all those pages and submittted the readahead IO if the queue was congested. We have the infrastructure to do that now.
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Andrew Morton authored
From: Dave McCracken <dmccr@us.ibm.com> This patch solves the race between truncate and page in which can cause stray anon pages to appear in the truncated region. The race occurs when a process is sleeping in pagein IO during the truncate: there's a window after checking i_size in which the paging-in process decides that the page was an OK one. This leaves an anon page in the pagetables, and if the file is subsequently extended we have an anon page floating about inside a file-backed mmap - user modifications will not be written out. Apparently this is also needed for the implementation of POSIX semantics for distributed filesystems. We use a generation counter in the address_space so the paging-in process can determine whether there was a truncate which might have shot the new page down. It's a bit grubby to be playing with files and inodes in do_no_page(), but we do need the page_table_lock coverage for this, and rearranging thngs to provide that coverage to filemap_nopage wasn't very nice either.
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Andrew Morton authored
From: "Paul E. McKenney" <paulmck@us.ibm.com> The patch reworks and generalises vmtruncate_list() a bit to create an API which invalidates a specified portion of an address_space, permitting distributed filesystems to maintain POSIX semantics when a file mmap()ed on one client is modified on another client.
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Andrew Morton authored
From: Chris Mason <mason@suse.com> unlock_buffer() needs a barrier before the waitqueue_active() optimisation.
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Andrew Morton authored
We need to subtract the number of freed slab pages from the number of pages to free, not add it.
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Andrew Morton authored
From: Marc Zyngier <mzyngier@freesurf.fr> The following patch tries to fix a small bug that crept in at some point during 2.5. None of my 3c592 or 3c597 would work if I didn't force media type. Instead, it would try to probe MII, looking for a suitable transceiver, and finaly give up, because these cards really do not have any sort of MII... : EISA: Probing bus 0 at Intel Corp. 82375EB EISA: Mainboard DEC5000 detected. EISA: slot 2 : ADP0001 detected. EISA: slot 3 : ADP7771 detected. EISA: slot 4 : DPTA401 detected. EISA: slot 5 : TCM5920 detected. 3c59x: Donald Becker and others. www.scyld.com/network/vortex.html 00:05: 3Com EISA 3c592 EISA 10Mbps Demon/Vortex at 0x5000. Vers LK1.1.19 ***WARNING*** No MII transceivers found! EISA: Detected 4 cards. With the enclosed patch, it just works, at least on my setup (3c592 on Alpha, and 3c597 on x86). I haven't been able to test it didn't break cards with MII, because I do not have such cards in my test boxes... The patch also removes two useless EISA-only #define I introduced some time ago.
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Andrew Morton authored
From: Greg KH <greg@kroah.com> Different architectures use different types for dev_t, so it is hard to print dev_t variables out correctly. Quite a lot of code is wrong now, and will continue to be wrong when 64-bit dev_t is merged. Greg's patch introduces a little wrapper function which can be used to safely form a dev_t for printing. I added the format_dev_t function as well, which is needed for direct insertion in a printk statement.
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Andrew Morton authored
Currently, all of the 3c59x power management code is disabled unless the `enable_wol' module parameter is provided. This was done because the PM support was added quite late in the 2.4 cycle. It was always intended that this conditionality be removed in 2.5.
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Andrew Morton authored
From: Jeremy Fitzhardinge <jeremy@goop.org> The 900MHz Pentium M has two spaces before the frequency: "Intel(R) Pentium(R) M processor 900MHz" This patch adds a 2nd CPU macro (_CPU) which also takes the stringified speed so that extra spacing can be added.
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Andrew Morton authored
We get a bug report about once per month wherein find_get_block_slow() spits an error message. For some reason we have buffers against a blockdev page which have the incorrect b_size. Probably, an earlier set_blcoksize() failed to invalidate all the apges for some reason. I just don't know. The patch adds a bit of extra debug info to aid in diagnosing this.
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Andrew Morton authored
From: William Lee Irwin III <wli@holomorphy.com> The original pgd/pmd slabification patches had a critical bug on non-PAE where both modifications of pgd entries to remove pagetables attached for non-PSE mappings back to a PSE state and modifications of pgd entries to attach pagetables to bring PSE mappings into a non-PSE state were not propagated to cached pgd's. PAE was immune to it owing to the shared kernel pmd. The following patch vs. 2.5.69 restores the slabification done to cache preconstructed pagetables with the proper propagation of conversions to and from PSE mappings to cached pgd's for the non-PAE case. This is an optimization to reduce the bitblitting overhead for spawning small tasks (for larger ones, bottom-level pagetable copies dominate) primarily on non-PAE; the PAE code change is largely to remove #ifdefs and to treat the two cases uniformly, though some positive but small performance improvement has been observed for PAE in one of mbligh's posts. The non-PAE performance improvement has been observed on a box running a script-heavy end-user workload as a large long-term profile hit count reduction for pgd_alloc() and relatives thereof. I would very much appreciate outside testers. Even though I've been able to verify this boots and runs properly and survives several cycles of restarting X on my non-PAE Thinkpad T21, that environment has never been able to reproduce the bug. Those with the proper graphics hardware to prod the affected codepaths into action are the ones best suited to verify proper functionality. There is also some locking introduced; if some performance verification on non-PAE SMP i386 targets (my SMP targets unfortunately all require PAE due to arch code dependencies) that also have the proper hardware could be done, that would help determine whether alternative locking schemes that competed against the one shown here are preferable (in particular, the ticket-based scheme mentioned in the comments).
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Andrew Morton authored
From Stephen Smalley <sds@epoch.ncsc.mil> This has been in -mm for a few weeks and James Morris has been regression testing each release.
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Andrew Morton authored
- remove unneeded loglevel manipulation in journal_dirty_metadata() - remove crud which was acidentally added to blkmtd.c - remove unused vars in mxser.c (Vinay K Nallamothu <vinay-rc@naturesoft.net>) - PF_LESS_THROTTLE was using the wrong bit (Joe Korty <joe.korty@ccur.com>) - unused var in cyclades.c ("Krishnakumar. R" <krishnakumar@naturesoft.net>)
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- 31 Jul, 2003 25 commits
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Chip Salzenberg authored
This patch notes that users should get nfs-utils 1.0.5 (1.0.4 had a memory usage bug), and tells them where to get it.
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Ralf Bächle authored
Here's another MIPS update. The patch is huge because it completly folds mips64 into mips, thereby eleminating 41010 lines of code.
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Andi Kleen authored
Only bug fixes and making it compile again and a few minor features. Also one security fix that got lost earlier - Document boot options - Better cpu local data - Emulate FIOQSIZE - Fix return value of 32bit ipccall - Various minor style fixes - Save some memory in apic tables - Merge with 2.6.0test2/i386 - Readd ioport fix - Sort exception tables at boot time - Add local.h - Fix for_each_cpu on UP - Add utimes and tgkill system calls for 64bit - Update defconfig
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Felipe Damasio authored
devfs_mk_cdev now only takes 3 parameters (dev_t, umode_t, fmt..), so update this driver to the new API.
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Rik van Riel authored
Time to update my CREDITS entry...
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Benjamin Herrenschmidt authored
This patch updates the PowerMac cpufreq driver so that it builds & works in current 2.6
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Benjamin Herrenschmidt authored
This adds proper registration of CPUs on ppc32, without this, accesses to cpufreq will oops.
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Michael Hunold authored
[V4L] - set debug verbosity to 0 for both Hexium drivers [V4L] - declare all local functions and variables static
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Michael Hunold authored
[DVB] - Hand off all processing of urb data to a tasklet
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Michael Hunold authored
[DVB] - correctly read MAC from eeprom on Technotrend and KNC1 cards
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Michael Hunold authored
[DVB] - show i2c read errors only for registered frontends
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Michael Hunold authored
[DVB] - if there are multiple adapters, bend the tuning frequency only if the adapters differ
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Michael Hunold authored
[V4L] - make sure saa7146 module gets build for Hexium drivers [V4L] - make Hexium drivers depend on the i2c layer [DVB] - fix typo which prevented the mt312 driver from being build (obi <=> obj)
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Andries E. Brouwer authored
OSF partitions are mostly found on alpha machines. It's been reported that the partition numbering changed between 2.4 and 2.6. This makes 2.6 use the 2.4 numbering scheme.
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Yoshinori Sato authored
build error and warning fix blkdev location cleanup typo fix
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Yoshinori Sato authored
H8S architecture support signal handling problem fix gcc-3.3 support vfork/clone return value fix added show_stack build error and warning fix blkdev location cleanup
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Yoshinori Sato authored
used common header files build error and warning fix add include/asm-h8300/local.h and include/asm-h8300/sections.h
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Yoshinori Sato authored
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Yoshinori Sato authored
interrupt management update target-support file update gcc-3.3 support blkdev location cleanup
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Yoshinori Sato authored
config script fix defconfig update Makefile update add H8S archtecture support
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Miles Bader authored
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Jens Axboe authored
From Lou Langholtz <ldl@aros.net> The queue_wait field of struct request_queue is not used anymore, and this gets rid of it.
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Jens Axboe authored
From Lou Langholtz <ldl@aros.net> This fixes the behavior of blk_start_queue() so that request queues really do start up again after blk_start_queue() is called (on queues that were previously stopped via blk_stop_queue).
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François Romieu authored
Fix a typo during last module refcounting fix.
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http://linux-isdn.bkbits.net/linux-2.5.makeLinus Torvalds authored
into home.osdl.org:/home/torvalds/v2.5/linux
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