- 12 Oct, 2011 34 commits
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Christoph Hellwig authored
There is no real need to the xfs_bmap_add_extent, as the callers know what kind of extents they need to it. Removing it means duplicating the extents to btree conversion logic in three places, but overall it's still much simpler code and quite a bit less code. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Alex Elder <aelder@sgi.com>
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Christoph Hellwig authored
Add a common helper for finding the last extent in a file. Largely based on a patch from Dave Chinner. Signed-off-by:
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Dave Chinner authored
Now that all the read-only users of xfs_bmapi have been converted to use xfs_bmapi_read(), we can remove all the read-only handling cases from xfs_bmapi(). Once this is done, rename xfs_bmapi to xfs_bmapi_write to reflect the fact it is for allocation only. This enables us to kill the XFS_BMAPI_WRITE flag as well. Also clean up xfs_bmapi_write to the style used in the newly added xfs_bmapi_read/delay functions. Signed-off-by:
Dave Chinner <dchinner@redhat.com> Signed-off-by:
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Dave Chinner authored
To further improve the readability of xfs_bmapi(), factor the unwritten extent conversion out into a separate function. This removes large block of logic from the xfs_bmapi() code loop and makes it easier to see the operational logic flow for xfs_bmapi(). Signed-off-by:
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Dave Chinner authored
To further improve the readability of xfs_bmapi(), factor the extent allocation out into a separate function. This removes a large block of logic from the xfs_bmapi() code loop and makes it easier to see the operational logic flow for xfs_bmapi(). Signed-off-by:
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Christoph Hellwig authored
We can just call xfs_bmap_add_extent_hole_delay directly to add a delayed allocated regions to the extent tree, instead of going through all the complexities of xfs_bmap_add_extent that aren't needed for this simple case. Signed-off-by:
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Christoph Hellwig authored
Delalloc reservations are much simpler than allocations, so give them a separate bmapi-level interface. Using the previously added xfs_bmapi_reserve_delalloc we get a function that is only minimally more complicated than xfs_bmapi_read, which is far from the complexity in xfs_bmapi. Also remove the XFS_BMAPI_DELAY code after switching over the only user to xfs_bmapi_delay. Signed-off-by:
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Christoph Hellwig authored
Move the reservation of delayed allocations, and addition of delalloc regions to the extent trees into a new helper function. For now this adds some twisted goto logic to xfs_bmapi, but that will be cleaned up in the following patches. Signed-off-by:
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Dave Chinner authored
Now we have xfs_bmapi_read, there is no need for xfs_bmapi_single(). Change the remaining caller over and kill the function. Signed-off-by:
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Dave Chinner authored
xfs_bmapi() currently handles both extent map reading and allocation. As a result, the code is littered with "if (wr)" branches to conditionally do allocation operations if required. This makes the code much harder to follow and causes significant indent issues with the code. Given that read mapping is much simpler than allocation, we can split out read mapping from xfs_bmapi() and reuse the logic that we have already factored out do do all the hard work of handling the extent map manipulations. The results in a much simpler function for the common extent read operations, and will allow the allocation code to be simplified in another commit. Once xfs_bmapi_read() is implemented, convert all the callers of xfs_bmapi() that are only reading extents to use the new function. Signed-off-by:
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Dave Chinner authored
To further improve the readability of xfs_bmapi(), factor the pure extent map manipulations out into separate functions. This removes large blocks of logic from the xfs_bmapi() code loop and makes it easier to see the operational logic flow for xfs_bmapi(). Signed-off-by:
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Christoph Hellwig authored
Instead of using a local variable that needs to updated when we modify the extent map just check ifp->if_bytes directly where we use it. Signed-off-by:
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Christoph Hellwig authored
We already have the worst case blocks reserved, so xfs_icsb_modify_counters won't fail in xfs_bmap_add_extent_delay_real. In fact we've had an assert to catch this case since day and it never triggered. So remove the code to try smaller reservations, and just return the error for that case in addition to keeping the assert. Signed-off-by:
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Christoph Hellwig authored
Both xfs_bmap_add_extent_hole_delay and xfs_bmap_add_extent_hole_real already contain code to handle the case where there is no extent to merge with, which is effectively the same as the code duplicated here. Signed-off-by:
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Mitsuo Hayasaka authored
An attribute of inode can be fetched via xfs_vn_getattr() in XFS. Currently it returns EIO, not negative value, when it failed. As a result, the system call returns not negative value even though an error occured. The stat(2), ls and mv commands cannot handle this error and do not work correctly. This patch fixes this bug, and returns -EIO, not EIO when an error is detected in xfs_vn_getattr(). Signed-off-by:
Mitsuo Hayasaka <mitsuo.hayasaka.hu@hitachi.com> Reviewed-by:
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Chandra Seetharaman authored
Fix the incorrect comment in the header of the function _xfs_buf_find(). Signed-off-by:
Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by:
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Chandra Seetharaman authored
Check the return value of xfs_trans_get_buf() and fail appropriately. Signed-off-by:
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Chandra Seetharaman authored
Check the return value of xfs_buf_get() and fail appropriately. Signed-off-by:
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Christoph Hellwig authored
Return unwritten extent conversion errors to aio_complete. Skip both unwritten extent conversion and size updates if we had an I/O error or the filesystem has been shut down. Return -EIO to the aio/buffer completion handlers in case of a forced shutdown. Signed-off-by:
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Christoph Hellwig authored
Currently a buffered reader or writer can add pages to the pagecache while we are waiting for the iolock in xfs_file_dio_aio_write. Prevent this by re-checking mapping->nrpages after we got the iolock, and if nessecary upgrade the lock to exclusive mode. To simplify this a bit only take the ilock inside of xfs_file_aio_write_checks. Signed-off-by:
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Christoph Hellwig authored
Currently xfs_attr_inactive causes a synchronous transactions if we are removing a file that has any extents allocated to the attribute fork, and thus makes XFS extremely slow at removing files with out of line extended attributes. The code looks a like a relict from the days before the busy extent list, but with the busy extent list we avoid reusing data and attr extents that have been freed but not commited yet, so this code is just as superflous as the synchronous transactions for data blocks. Signed-off-by:
Bernd Schubert <bernd.schubert@itwm.fraunhofer.de> Reviewed-by:
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Christoph Hellwig authored
We now have an i_dio_count filed and surrounding infrastructure to wait for direct I/O completion instead of i_icount, and we have never needed to iocount waits for buffered I/O given that we only set the page uptodate after finishing all required work. Thus remove i_iocount, and replace the actually needed waits with calls to inode_dio_wait. Signed-off-by:
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Christoph Hellwig authored
The current code relies on the xfs_ioend_wait call later on to make sure all I/O actually has completed. The xfs_ioend_wait call will go away soon, so prepare for that by using the waiting filemap function. Signed-off-by:
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Christoph Hellwig authored
There is no reason to queue up ioends for processing in user context unless we actually need it. Just complete ioends that do not convert unwritten extents or need a size update from the end_io context. Signed-off-by:
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Christoph Hellwig authored
We really shouldn't complete AIO or DIO requests until we have finished the unwritten extent conversion and size update. This means fsync never has to pick up any ioends as all work has been completed when signalling I/O completion. Signed-off-by:
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Christoph Hellwig authored
No driver returns ENODEV from it bio completion handler, not has this ever been documented. Remove the dead code dealing with it. Signed-off-by:
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Christoph Hellwig authored
And also remove the strange local lock and delwri list pointers in a few functions. Signed-off-by:
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Christoph Hellwig authored
Remove the xfs_buf_relse from xfs_bwrite and let the caller handle it to mirror the delwri and read paths. Also remove the mount pointer passed to xfs_bwrite, which is superflous now that we have a mount pointer in the buftarg. Signed-off-by:
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Christoph Hellwig authored
Unify the ways we add buffers to the delwri queue by always calling xfs_buf_delwri_queue directly. The xfs_bdwrite functions is removed and opencoded in its callers, and the two places setting XBF_DELWRI while a buffer is locked and expecting xfs_buf_unlock to pick it up are converted to call xfs_buf_delwri_queue directly, too. Also replace the XFS_BUF_UNDELAYWRITE macro with direct calls to xfs_buf_delwri_dequeue to make the explicit queuing/dequeuing more obvious. Signed-off-by:
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Christoph Hellwig authored
Do not transfer a reference held by the caller to the buffer on the list, or decrement it in xfs_buf_delwri_queue, but instead grab a new reference if needed, and let the caller drop its own reference. Also move setting of the XBF_DELWRI and XBF_ASYNC flags into xfs_buf_delwri_queue, and only do it if needed. Note that for now xfs_buf_unlock already has XBF_DELWRI, but that will change in the following patches. Signed-off-by:
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Christoph Hellwig authored
We can just unlock the buffer in the caller, and the decrement of b_hold would also be needed in the !unlock, we just never hit that case currently given that the caller handles that case. Signed-off-by:
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Christoph Hellwig authored
We cannot ever reach xfs_buf_iorequest for a buffer with XBF_DELWRI set, given that all write handlers make sure that the buffer is remove from the delwri queue before, and we never do reads with the XBF_DELWRI flag set (which the code would not handle correctly anyway). Signed-off-by:
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Dave Chinner authored
For append write workloads, extending the file requires a certain amount of exclusive locking to be done up front to ensure sanity in things like ensuring that we've zeroed any allocated regions between the old EOF and the start of the new IO. For single threads, this typically isn't a problem, and for large IOs we don't serialise enough for it to be a problem for two threads on really fast block devices. However for smaller IO and larger thread counts we have a problem. Take 4 concurrent sequential, single block sized and aligned IOs. After the first IO is submitted but before it completes, we end up with this state: IO 1 IO 2 IO 3 IO 4 +-------+-------+-------+-------+ ^ ^ | | | | | | | \- ip->i_new_size \- ip->i_size And the IO is done without exclusive locking because offset <= ip->i_size. When we submit IO 2, we see offset > ip->i_size, and grab the IO lock exclusive, because there is a chance we need to do EOF zeroing. However, there is already an IO in progress that avoids the need for IO zeroing because offset <= ip->i_new_size. hence we could avoid holding the IO lock exlcusive for this. Hence after submission of the second IO, we'd end up this state: IO 1 IO 2 IO 3 IO 4 +-------+-------+-------+-------+ ^ ^ | | | | | | | \- ip->i_new_size \- ip->i_size There is no need to grab the i_mutex of the IO lock in exclusive mode if we don't need to invalidate the page cache. Taking these locks on every direct IO effective serialises them as taking the IO lock in exclusive mode has to wait for all shared holders to drop the lock. That only happens when IO is complete, so effective it prevents dispatch of concurrent direct IO writes to the same inode. And so you can see that for the third concurrent IO, we'd avoid exclusive locking for the same reason we avoided the exclusive lock for the second IO. Fixing this is a bit more complex than that, because we need to hold a write-submission local value of ip->i_new_size to that clearing the value is only done if no other thread has updated it before our IO completes..... Signed-off-by: -
Dave Chinner authored
There is no need to grab the i_mutex of the IO lock in exclusive mode if we don't need to invalidate the page cache. Taking these locks on every direct IO effective serialises them as taking the IO lock in exclusive mode has to wait for all shared holders to drop the lock. That only happens when IO is complete, so effective it prevents dispatch of concurrent direct IO reads to the same inode. Fix this by taking the IO lock shared to check the page cache state, and only then drop it and take the IO lock exclusively if there is work to be done. Hence for the normal direct IO case, no exclusive locking will occur. Signed-off-by:
Joern Engel <joern@logfs.org> Reviewed-by:
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- 05 Oct, 2011 1 commit
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Linus Torvalds authored
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- 04 Oct, 2011 5 commits
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git://github.com/davem330/netLinus Torvalds authored
* git://github.com/davem330/net: pch_gbe: Fixed the issue on which a network freezes pch_gbe: Fixed the issue on which PC was frozen when link was downed. make PACKET_STATISTICS getsockopt report consistently between ring and non-ring net: xen-netback: correctly restart Tx after a VM restore/migrate bonding: properly stop queuing work when requested can bcm: fix incomplete tx_setup fix RDSRDMA: Fix cleanup of rds_iw_mr_pool net: Documentation: Fix type of variables ibmveth: Fix oops on request_irq failure ipv6: nullify ipv6_ac_list and ipv6_fl_list when creating new socket cxgb4: Fix EEH on IBM P7IOC can bcm: fix tx_setup off-by-one errors MAINTAINERS: tehuti: Alexander Indenbaum's address bounces dp83640: reduce driver noise ptp: fix L2 event message recognition
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git://github.com/tiwai/soundLinus Torvalds authored
* 'fix/asoc' of git://github.com/tiwai/sound: ASoC: omap_mcpdm_remove cannot be __devexit ASoC: Fix setting update bits for WM8753_LADC and WM8753_RADC ASoC: use a valid device for dev_err() in Zylonite
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git://people.freedesktop.org/~airlied/linuxLinus Torvalds authored
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: drm/radeon/kms: fix channel_remap setup (v2) drm/radeon: Set cursor x/y to 0 when x/yorigin > 0. drm/radeon: Update AVIVO cursor coordinate origin before x/yorigin calculation. drm/radeon: Simplify cursor x/yorigin calculation. drm/radeon/kms: fix cursor image off-by-one error drm/radeon/kms: Fix logic error in DP HPD handler drm/radeon/kms: add retry limits for native DP aux defer drm/radeon/kms: fix regression in DP aux defer handling
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git://git.secretlab.ca/git/linux-2.6Linus Torvalds authored
* 'spi/merge' of git://git.secretlab.ca/git/linux-2.6: spi-topcliff-pch: Fix overrun issue spi-topcliff-pch: Add recovery processing in case FIFO overrun error occurs spi-topcliff-pch: Fix CPU read complete condition issue spi-topcliff-pch: Fix SSN Control issue spi-topcliff-pch: add tx-memory clear after complete transmitting
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Jon Mason authored
Add the ability to disable PCI-E MPS turning and using the BIOS configured MPS defaults. Due to the number of issues recently discovered on some x86 chipsets, make this the default behavior. Also, add the option for peer to peer DMA MPS configuration. Peer to peer DMA is outside the scope of this patch, but MPS configuration could prevent it from working by having the MPS on one root port different than the MPS on another. To work around this, simply make the system wide MPS the smallest possible value (128B). Signed-off-by:
Jon Mason <mason@myri.com> Acked-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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