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- 25 Feb, 2003 1 commit
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Michael Hayes authored
doesnt -> doesn't (35 occurrences)
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- 10 Sep, 2002 1 commit
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Andrew Morton authored
Bill Irwin's patch to fix up pte's in highmem. With CONFIG_HIGHPTE, the direct pte pointer in struct page becomes the 64-bit physical address of the single pte which is mapping this page. If the page is not PageDirect then page->pte.chain points at a list of pte_chains, which each now contain an array of 64-bit physical addresses of the pte's which are mapping the page. The functions rmap_ptep_map() and rmap_ptep_unmap() are used for mapping and unmapping the page which backs the target pte. The patch touches all architectures (adding do-nothing compatibility macros and inlines). It generally mangles lots of header files and may break non-ia32 compiles. I've had it in testing since 2.5.31.
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- 02 Jun, 2002 2 commits
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Andrew Morton authored
First some terminology: this patch introduces a kernel-wide `pgoff_t' type. It is the index of a page into the pagecache. The thing at page->index. For most mappings it is also the offset of the page into that mapping. This type has a very distinct function in the kernel and it needs a name. I don't have any particular plans to go and migrate everything so we can support 64-bit pagecache indices on x86, but this would be the way to do it. This patch improves the packing density of swapcache pages in the radix tree. A swapcache page is identified by the `swap type' (indexes the swap device) and the `offset' (into that swap device). These two numbers are encoded into a `swp_entry_t' machine word in arch-specific code because the resulting number is placed into pagetables in a form which will generate a fault. The kernel also need to generate a pgoff_t for that page to index it into the swapper_space radix tree. That pgoff_t is usually bitwise-identical to the swp_entry_t. That worked OK when the pagecache was using a hash. But with a radix tree, it produces catastrophically bad results. x86 (and many other architectures) place the `type' field into the low-order bits of the swp_entry_t. So *all* swapcache pages are basically identical in the eight low-order bits. This produces a very sparse radix tree for swapcache. I'm observing packing densities of 1% to 2%: so the typical 128-slot radix tree node has only one or two pages in it. The end result is that the kernel needs to allocate approximately one new radix-tree node for each page which is added to the swapcache. So no wonder we're having radix-tree node exhaustion during swapout! (It's actually quite encouraging that the kernel works as well as it does). The patch changes the encoding of the swp_entry_t so that its most-significant bits contain the `type' field and the least-significant bits contain the `offset' field, right-aligned. That is: the encoding in swp_entry_t is now arch-independent. The new file <linux/swapops.h> has conversion functions which convert the swp_entry_t to and from its machine pte representation. Packing density in the swapper_space mapping goes up to around 90% (observed) and the kernel is tons happier under swap load. An alternative approach would be to create new conversion functions which convert an arch-specific swp_entry_t to and from a pgoff_t. I tried that. It worked, but I liked it less.
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Andrew Morton authored
Remove some unused PageSkip() macros. Presumably leftovers from PG_skip which isn't there any more.
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- 19 Feb, 2002 1 commit
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Rik van Riel authored
The patch has been changed like you wanted, with page->zone shoved into page->flags. I've also pulled the thing up to your latest changes from linux.bkbits.net so you should be able to just pull it into your tree from: Rik
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- 13 Feb, 2002 1 commit
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Paul Mackerras authored
The patch below changes access_process_vm to use a new architecture hook, flush_icache_user_range, instead of flush_icache_page, and adds a definition of flush_icache_user_range which does the same thing as flush_icache_page for all architectures except PPC. (The PPC update that is in Linus' BK tree already includes a suitable definition of flush_icache_user_range.) The reason for doing this is that when flush_icache_page is called from do_no_page or do_swap_page, I want to be able to do the flush conditionally, based on the state of the page. In contrast, access_process_vm needs to do the flush unconditionally since it has just modified the page. In the access_process_vm case it is useful to have the information about the user address and length that have been modified since then we can just flush the affected cache lines rather than the whole page. This patch should make it easy to improve performance on alpha, since there (as I understand it) the icache flush is not needed at all in do_no_page or do_swap_page, but is needed in access_process_vm. All that is needed is to make flush_icache_page a noop on alpha. The patch below doesn't do this, I'll let the alpha maintainers push that change if they want.
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- 05 Feb, 2002 4 commits
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Linus Torvalds authored
- Al Viro: fix up silly problem in swapfile filp cleanups in 2.5.2 - Tachino Nobuhiro: fix another error return for swapfile filp code - Robert Love: merge some of Ingo's scheduler fixes - David Miller: networking, sparc and some scsi driver fixes - Tim Waugh: parport update - OGAWA Hirofumi: fatfs cleanups and bugfixes - Roland Dreier: fix vsscanf buglets. - Ben LaHaise: include file cleanup - Andre Hedrick: IDE taskfile update
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Linus Torvalds authored
- Alan Cox: big driver/mips sync - Andries Brouwer, Christoph Hellwig: more gendisk fixups - Tobias Ringstrom: tulip driver workaround for DC21143 erratum
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Linus Torvalds authored
- make sure "sync()" doesn't effectively lock up the machine by overloading all the IO resources - fix up some network memory allocations that don't wan tto wait on IO. - merge with Alan (including MIPS update) - Jeff Garzik: network driver updates. - Al Viro: System V FS update (write capability, page cache, mondo cleanups) - Kai Germaschewski: ISDN cleanups, TURBOPAM driver by Stelian Pop - Ben Fennema: UDF update (time handling, i_blocks fix) - Neil Brown: md error handling improvements, knfsd file handle compatibility - Paul Mackerras: PPC update - Jakub Jelinek: fix up kernel linker scripts to accept .rodata better - Patrick Mochel: fix PME handling in pci_enable_wake() - Chris Mason: reiserfs PF_MEMALLOC handling
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Linus Torvalds authored
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