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* Pagecache zeroing: zero_user_segment, zero_user_segments and zero_userChristoph Lameter2008-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Simplify page cache zeroing of segments of pages through 3 functions zero_user_segments(page, start1, end1, start2, end2) Zeros two segments of the page. It takes the position where to start and end the zeroing which avoids length calculations and makes code clearer. zero_user_segment(page, start, end) Same for a single segment. zero_user(page, start, length) Length variant for the case where we know the length. We remove the zero_user_page macro. Issues: 1. Its a macro. Inline functions are preferable. 2. The KM_USER0 macro is only defined for HIGHMEM. Having to treat this special case everywhere makes the code needlessly complex. The parameter for zeroing is always KM_USER0 except in one single case that we open code. Avoiding KM_USER0 makes a lot of code not having to be dealing with the special casing for HIGHMEM anymore. Dealing with kmap is only necessary for HIGHMEM configurations. In those configurations we use KM_USER0 like we do for a series of other functions defined in highmem.h. Since KM_USER0 is depends on HIGHMEM the existing zero_user_page function could not be a macro. zero_user_* functions introduced here can be be inline because that constant is not used when these functions are called. Also extract the flushing of the caches to be outside of the kmap. [akpm@linux-foundation.org: fix nfs and ntfs build] [akpm@linux-foundation.org: fix ntfs build some more] Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Steven French <sfrench@us.ibm.com> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Cc: <linux-ext4@vger.kernel.org> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Anton Altaparmakov <aia21@cantab.net> Cc: Mark Fasheh <mark.fasheh@oracle.com> Cc: David Chinner <dgc@sgi.com> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Cc: Steven French <sfrench@us.ibm.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* NTFS: Fix read regression.Anton Altaparmakov2007-11-03
| | | | | | | | | | | | | | | | | The regression was caused by: commit[a32ea1e1f925399e0d81ca3f7394a44a6dafa12c] Fix read/truncate race This causes ntfs_readpage() to be called for a zero i_size inode, which failed when the file was compressed and non-resident. Thanks a lot to Mike Galbraith for reporting the issue and tracking down the commit that caused the regression. Looking into it I found three bugs which the patch fixes. Signed-off-by: Anton Altaparmakov <aia21@cantab.net> Tested-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* NTFS: Fix a mount time deadlock.Anton Altaparmakov2007-10-12
| | | | | | | | | | | | | | | | | | | | | | Big thanks go to Mathias Kolehmainen for reporting the bug, providing debug output and testing the patches I sent him to get it working. The fix was to stop calling ntfs_attr_set() at mount time as that causes balance_dirty_pages_ratelimited() to be called which on systems with little memory actually tries to go and balance the dirty pages which tries to take the s_umount semaphore but because we are still in fill_super() across which the VFS holds s_umount for writing this results in a deadlock. We now do the dirty work by hand by submitting individual buffers. This has the annoying "feature" that mounting can take a few seconds if the journal is large as we have clear it all. One day someone should improve on this by deferring the journal clearing to a helper kernel thread so it can be done in the background but I don't have time for this at the moment and the current solution works fine so I am leaving it like this for now. Signed-off-by: Anton Altaparmakov <aia21@cantab.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ntfs: use zero_user_pageNate Diller2007-05-12
| | | | | | | | | | Use zero_user_page() instead of open-coding it. [akpm@linux-foundation.org: kmap-type fixes] Signed-off-by: Nate Diller <nate.diller@gmail.com> Acked-by: Anton Altaparmakov <aia21@cantab.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] ntfs: kmap_atomic() atomicity fixAndrew Morton2007-01-30
| | | | | | | | The KM_BIO_SRC_IRQ kmap slot requires local irq protection. Acked-by: Anton Altaparmakov <aia21@cantab.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] fs/ntfs: Conversion to generic booleanRichard Knutsson2006-10-01
| | | | | | | | | Conversion of booleans to: generic-boolean.patch (2006-08-23) Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se> Signed-off-by: Anton Altaparmakov <aia21@cantab.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mark address_space_operations constChristoph Hellwig2006-06-28
| | | | | | | | | | Same as with already do with the file operations: keep them in .rodata and prevents people from doing runtime patching. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Steven French <sfrench@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* NTFS: Semaphore to mutex conversion.Ingo Molnar2006-03-23
| | | | | | | | | The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Remove all the make_bad_inode() calls. This should only be calledAnton Altaparmakov2006-03-23
| | | | | | from read inode and new inode code paths. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Use buffer_migrate_page() for the ->migratepage function of all ntfsAnton Altaparmakov2006-03-23
| | | | | | address space operations. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Implement support for sector sizes above 512 bytes (up to the maximumAnton Altaparmakov2006-02-24
| | | | supported by NTFS which is 4096 bytes).
* NTFS: $EA attributes can be both resident non-resident.Anton Altaparmakov2005-10-19
| | | | | | Minor tidying. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Remove address space operations ->prepare_write and ->commit_write inAnton Altaparmakov2005-10-11
| | | | | | preparation for the big rewrite of write(2) support in ntfs. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Fix ntfs_{read,write}page() to cope with concurrent truncates better.Anton Altaparmakov2005-09-19
| | | | Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Fix handling of compressed directories that I broke in earlier changeset.Anton Altaparmakov2005-09-19
| | | | Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* [PATCH] ntfs build fixAndrew Morton2005-09-10
| | | | | | | | | *** Warning: "bit_spin_lock" [fs/ntfs/ntfs.ko] undefined! *** Warning: "bit_spin_unlock" [fs/ntfs/ntfs.ko] undefined! Cc: Anton Altaparmakov <aia21@cantab.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* NTFS: 2.1.24 release and some minor final fixes.Anton Altaparmakov2005-09-08
| | | | Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Improve scalability by changing the driver global spin lock inAnton Altaparmakov2005-09-08
| | | | | | | fs/ntfs/aops.c::ntfs_end_buffer_async_read() to a bit spin lock in the first buffer head of a page. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Fix page_has_buffers()/page_buffers() handling in fs/ntfs/aops.c.Anton Altaparmakov2005-09-08
| | | | Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Fixup handling of sparse, compressed, and encrypted attributes inAnton Altaparmakov2005-09-08
| | | | | | fs/ntfs/aops.c::ntfs_readpage(). Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Fix fs/ntfs/aops.c::ntfs_{read,write}_block() to handle the caseAnton Altaparmakov2005-09-08
| | | | | | where a concurrent truncate has truncated the runlist under our feet. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Optimize fs/ntfs/aops.c::ntfs_write_block() by extending the pageAnton Altaparmakov2005-09-08
| | | | | | | lock protection over the buffer submission for i/o which allows the removal of the get_bh()/put_bh() pairs for each buffer. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Fixup handling of sparse, compressed, and encrypted attributes inAnton Altaparmakov2005-09-08
| | | | | | fs/ntfs/aops.c::ntfs_writepage(). Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Make ntfs_write_block() not instantiate sparse blocks if they are zero.Anton Altaparmakov2005-09-08
| | | | Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Complete the previous fix for the unset device when mapping buffersAnton Altaparmakov2005-08-16
| | | | | | | for mft record writing. I had missed the writepage based mft record write code path. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Fix a bug in address space operations error recovery code paths whereAnton Altaparmakov2005-06-25
| | | | | | | | if the runlist was not mapped at all and a mapping error occured we would leave the runlist locked on exit to the function so that the next access to the same file would try to take the lock and deadlock. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Use MAX_BUF_PER_PAGE instead of variable sized array allocation forAnton Altaparmakov2005-05-05
| | | | | | better code generation and one less sparse warning in fs/ntfs/aops.c. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: - Modify ->readpage and ->writepage (fs/ntfs/aops.c) so they detectAnton Altaparmakov2005-05-05
| | | | | | | | | | and handle the case where an attribute is converted from resident to non-resident by a concurrent file write. - Reorder some operations when converting an attribute from resident to non-resident (fs/ntfs/attrib.c) so it is safe wrt concurrent ->readpage and ->writepage. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Fix printk format warnings on ia64. (Randy Dunlap)Randy Dunlap2005-05-05
| | | | | Signed-off-by: Randy Dunlap <rddunlap@osdl.org> Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: - Split ntfs_map_runlist() into ntfs_map_runlist() and a non-lockingAnton Altaparmakov2005-05-05
| | | | | | | | | | | | | helper ntfs_map_runlist_nolock() which is used by ntfs_map_runlist(). This allows us to map runlist fragments with the runlist lock already held without having to drop and reacquire it around the call. Adapt all callers. - Change ntfs_find_vcn() to ntfs_find_vcn_nolock() which takes a locked runlist. This allows us to find runlist elements with the runlist lock already held without having to drop and reacquire it around the call. Adapt all callers. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Optimise/reorganise some error handling code in fs/ntfs/aops.c.Anton Altaparmakov2005-05-05
| | | | Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Fixup the resident attribute resizing code inAnton Altaparmakov2005-05-05
| | | | | | | fs/ntfs/aops.c::ntfs_{prepare,commit}_write()() and re-enable it. It should be safe now. (Famous last words...) Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Repeat a failed ntfs_truncate() in fs/ntfs/aops.c::ntfs_writepage()Anton Altaparmakov2005-05-05
| | | | | | and abort if it fails again. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* NTFS: Use i_size_{read,write}() in fs/ntfs/{aops.c,mft.c} and protectAnton Altaparmakov2005-05-05
| | | | | | access to the i_size and other size fields using the size_lock. Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
* Linux-2.6.12-rc2Linus Torvalds2005-04-16
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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