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2008-01-30NFS: define a function to update nfsi->cache_change_attributeTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Remove an unneeded check in decode_compound_header_arg()Chuck Lever
Clean up: The header tag length is unsigned, so checking that it is less than zero is unnecessary. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Clean up address comparison in __nfs_find_client()Chuck Lever
The address comparison in the __nfs_find_client() function is deceptive. It uses a memcmp() to check a pair of u32 fields for equality. Not only is this inefficient, but usually memcmp() is used for comparing two *whole* sockaddr_in's (which includes comparisons of the address family and port number), so it's easy to mistake the comparison here for a whole sockaddr comparison, which it isn't. So for clarity and efficiency, we replace the memcmp() with a simple test for equality between the two s_addr fields. This should have no behavioral effect. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Clean up: copy hostname with kstrndup during mount processingChuck Lever
Clean up: mount option parsing uses kstrndup in several places, rather than using kzalloc. Replace the few remaining uses of kzalloc with kstrndup, for consistency. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Remove support for the 'mountprog' optionChuck Lever
Remove the mount option that allows users to specify an alternate mountd program number. The client hasn't support setting an alternate mountd program number for a very long time. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Remove support for the 'nfsprog' optionChuck Lever
Remove the mount option that allows users to specify an alternate NFS program number. The client hasn't support setting an alternate NFS program number for a very long time. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Ensure that NFS version 4 mounts use NFS_PORT if nfsport wasn't setChuck Lever
Text-based mount option parsing introduced a minor regression in the behavior of NFS version 4 mounts. NFS version 4 is not supposed to require a running rpcbind service on the server in order for a mount to succeed. In other words, if the mount options don't specify a port number, the port number is supposed to default to 2049. For earlier versions of NFS, the default port number was zero in order to cause the RPC client to autobind to the server's NFS service. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Prevent nfs_getattr() hang during heavy write workloadsChuck Lever
POSIX requires that ctime and mtime, as reported by the stat(2) call, reflect the activity of the most recent write(2). To that end, nfs_getattr() flushes pending dirty writes to a file before doing a GETATTR to allow the NFS server to set the file's size, ctime, and mtime properly. However, nfs_getattr() can be starved when a constant stream of application writes to a file prevents nfs_wb_nocommit() from completing. This usually results in hangs of programs doing a stat against an NFS file that is being written. "ls -l" is a common victim of this behavior. To prevent starvation, hold the file's i_mutex in nfs_getattr() to freeze applications writes temporarily so the client can more quickly obtain clean values for a file's size, mtime, and ctime. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Change sign of some loop indices in nfs4xdr.cChuck Lever
Nit: Eliminate some mixed sign comparisons in loop indices. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Use unsigned intermediates for manipulating header lengths (NFSv4 XDR)Chuck Lever
Clean up: prevent length underflow and mixed sign comparison when unmarshalling NFS version 4 getacl, readdir, and readlink replies. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Use unsigned intermediates for manipulating header lengths (NFSv3 XDR)Chuck Lever
Clean up: prevent length underflow and mixed sign comparisons when unmarshalling NFS version 3 read, readdir, and readlink replies. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Use unsigned intermediates for manipulating header lengths (NFSv2 XDR)Chuck Lever
Clean up: prevent length underflow and mixed sign comparisons when unmarshalling NFS version 2 read, readdir, and readlink replies. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Ensure nfs_wcc_update_inode always converts file size to loff_tChuck Lever
The nfs_wcc_update_inode() function omits logic to convert the type of the NFS on-the-wire value of a file's size (__u64) to the type of file size value stored in struct inode (loff_t, which is signed). Everywhere else in the NFS client I checked already correctly converts the file size type. This effects only very large files. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS/SUNRPC: Convert users of rpc_init_task+rpc_execute to rpc_run_task()Trond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS/SUNRPC: Convert all users of rpc_call_setup()Trond Myklebust
Replace use of rpc_call_setup() with rpc_init_task(), and in cases where we need to initialise task->tk_action, with rpc_call_start(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Clean up the (commit|read|write)_setup() callback routinesTrond Myklebust
Move the common code for setting up the nfs_write_data and nfs_read_data structures into fs/nfs/read.c, fs/nfs/write.c and fs/nfs/direct.c. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: Clean up the initialisation of priority queue scheduling info.Trond Myklebust
We want the default scheduling priority (priority == 0) to remain RPC_PRIORITY_NORMAL. Also ensure that the priority wait queue scheduling is per process id instead of sometimes being per thread, and sometimes being per inode. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: Clean up rpc_run_taskTrond Myklebust
Make it use the new task initialiser structure instead of acting as a wrapper. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: Cleanup of rpc_task initialisationTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Stop sillyname renames and unmounts from racingSteve Dickson
Added an active/deactive mechanism to the nfs_server structure allowing async operations to hold off umount until the operations are done. Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFSv4: Clean up the OPEN/CLOSE serialisation codeTrond Myklebust
Reduce the time spent locking the rpc_sequence structure by queuing the nfs_seqid only when we are ready to take the lock (when calling nfs_wait_on_sequence). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Clean up the write request locking.Trond Myklebust
Ensure that we set/clear NFS_PAGE_TAG_LOCKED when the nfs_page is hashed. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Optimise nfs_vm_page_mkwrite()Trond Myklebust
The current model locks the page twice for no good reason. Optimise by inlining the parts of nfs_write_begin()/nfs_write_end() that we care about. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Ensure that we eject stale inodes as soon as possibleTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Handle -ENOENT errors in unlink()/rmdir()/rename()Trond Myklebust
If the server returns an ENOENT error, we still need to do a d_delete() in order to ensure that the dentry is deleted. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Sillyrename: in the case of a race, check aliases are really positiveTrond Myklebust
In nfs_do_call_unlink() we check that we haven't raced, and that lookup() hasn't created an aliased dentry to our sillydeleted dentry. If somebody has deleted the file on the server and the lookup() resulted in a negative dentry, then ignore... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Fix a sillyrename race...Trond Myklebust
Ensure that readdir revalidates its data cache after blocking on sillyrename. Also fix a typo in nfs_do_call_unlink(): swap the ^= for an |=. The result is the same, since we've already checked that the flag is unset, but it makes the code more readable. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-29splice: fix problem with atime not being updatedJens Axboe
A bug report on nfsd that states that since it was switched to use splice instead of sendfile, the atime was no longer being updated on the input file. do_generic_mapping_read() does this when accessing the file, make splice do it for the direct splice handler. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-01-29Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.25Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.25: (1470 commits) [IPV6] ADDRLABEL: Fix double free on label deletion. [PPP]: Sparse warning fixes. [IPV4] fib_trie: remove unneeded NULL check [IPV4] fib_trie: More whitespace cleanup. [NET_SCHED]: Use nla_policy for attribute validation in ematches [NET_SCHED]: Use nla_policy for attribute validation in actions [NET_SCHED]: Use nla_policy for attribute validation in classifiers [NET_SCHED]: Use nla_policy for attribute validation in packet schedulers [NET_SCHED]: sch_api: introduce constant for rate table size [NET_SCHED]: Use typeful attribute parsing helpers [NET_SCHED]: Use typeful attribute construction helpers [NET_SCHED]: Use NLA_PUT_STRING for string dumping [NET_SCHED]: Use nla_nest_start/nla_nest_end [NET_SCHED]: Propagate nla_parse return value [NET_SCHED]: act_api: use PTR_ERR in tcf_action_init/tcf_action_get [NET_SCHED]: act_api: use nlmsg_parse [NET_SCHED]: act_api: fix netlink API conversion bug [NET_SCHED]: sch_netem: use nla_parse_nested_compat [NET_SCHED]: sch_atm: fix format string warning [NETNS]: Add namespace for ICMP replying code. ...
2008-01-29Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuildLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: (79 commits) Remove references to "make dep" kconfig: document use of HAVE_* Introduce new section reference annotations tags: __ref, __refdata, __refconst kbuild: warn about ld added unique sections kbuild: add verbose option to Section mismatch reporting in modpost kconfig: tristate choices with mixed tristate and boolean values asm-generic/vmlix.lds.h: simplify __mem{init,exit}* dependencies remove __attribute_used__ kbuild: support ARCH=x86 in buildtar kconfig: remove "enable" kbuild: simplified warning report in modpost kbuild: introduce a few helpers in modpost kbuild: use simpler section mismatch warnings in modpost kbuild: link vmlinux.o before kallsyms passes kbuild: introduce new option to enhance section mismatch analysis Use separate sections for __dev/__cpu/__mem code/data compiler.h: introduce __section() all archs: consolidate init and exit sections in vmlinux.lds.h kbuild: check section names consistently in modpost kbuild: introduce blacklisting in modpost ...
2008-01-29Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (50 commits) jbd2: sparse pointer use of zero as null jbd2: Use round-jiffies() function for the "5 second" ext4/jbd2 wakeup jbd2: Mark jbd2 slabs as SLAB_TEMPORARY jbd2: add lockdep support ext4: Use the ext4_ext_actual_len() helper function ext4: fix uniniatilized extent splitting error ext4: Check for return value from sb_set_blocksize ext4: Add stripe= option to /proc/mounts ext4: Enable the multiblock allocator by default ext4: Add multi block allocator for ext4 ext4: Add new functions for searching extent tree ext4: Add ext4_find_next_bit() ext4: fix up EXT4FS_DEBUG builds ext4: Fix ext4_show_options to show the correct mount options. ext4: Add EXT4_IOC_MIGRATE ioctl ext4: Add inode version support in ext4 vfs: Add 64 bit i_version support ext4: Add the journal checksum feature jbd2: jbd2 stats through procfs ext4: Take read lock during overwrite case. ...
2008-01-28jbd2: sparse pointer use of zero as nullMingming Cao
Get rid of sparse related warnings from places that use integer as NULL pointer. (Ported from upstream ext3/jbd changes.) Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-01-28jbd2: Use round-jiffies() function for the "5 second" ext4/jbd2 wakeupMingming Cao
While "every 5 seconds" doesn't sound as a problem, there can be many of these (and these timers do add up over all the kernel). The "5 second" wakeup isn't really timing sensitive; in addition even with rounding it'll still happen every 5 seconds (with the exception of the very first time, which is likely to be rounded up to somewhere closer to 6 seconds) (Ported from similar JBD patch made by Arjan van de Ven to fs/jbd/transaction.c) Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Andrew Morton <akpm@osdl.org> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-01-28jbd2: Mark jbd2 slabs as SLAB_TEMPORARYMingming Cao
This patch marks slab allocations by jbd2 as short-lived in support of Mel Gorman's "Group short-lived and reclaimable kernel allocations" patch. (Ported from similar changes made to fs/jbd/journal.c and fs/jbd/revoke.c in Mel's patch.) Cc: Mel Gorman <mel@csn.ul.ie> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-01-28jbd2: add lockdep supportMingming Cao
Ported from similar patch for the jbd layer. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-01-28ext4: Use the ext4_ext_actual_len() helper functionAneesh Kumar K.V
ext4 uses the high bit of the extent length to encode whether the extent is intialized or not. The helper function ext4_ext_get_actual_len should be used to get the actual length of the extent. This addresses the kernel bug documented here: http://bugzilla.kernel.org/show_bug.cgi?id=9732 kernel BUG at fs/ext4/extents.c:1056! .... Call Trace: [<ffffffff88366073>] :ext4dev:ext4_ext_get_blocks+0x5ba/0x8c1 [<ffffffff81053c91>] lock_release_holdtime+0x27/0x49 [<ffffffff812748f6>] _spin_unlock+0x17/0x20 [<ffffffff883400a6>] :jbd2:start_this_handle+0x4e0/0x4fe [<ffffffff88366564>] :ext4dev:ext4_fallocate+0x175/0x39a [<ffffffff81053c91>] lock_release_holdtime+0x27/0x49 [<ffffffff81056480>] __lock_acquire+0x4e7/0xc4d [<ffffffff81053c91>] lock_release_holdtime+0x27/0x49 [<ffffffff810a8de7>] sys_fallocate+0xe4/0x10d [<ffffffff8100c043>] tracesys+0xd5/0xda Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-01-28ext4: fix uniniatilized extent splitting errorDmitry Monakhov
Fix bug reported by Dmitry Monakhov caused by lost error code Testcase: blksize = 0x1000; fd = open(argv[1], O_RDWR|O_CREAT, 0700); unsigned long long sz = 0x10000000UL; /* allocating big blocks chunk */ syscall(__NR_fallocate, fd, 0, 0UL, sz) /* grab all other available filesystem space */ tfd = open("tmp", O_RDWR|O_CREAT|O_DIRECT, 0700); while( write(tfd, buf, 4096) > 0); /* loop untill ENOSPC */ fsync(fd); /* just in case */ while (pos < sz) { /* each seek+ write operation result in splits uninitialized extent in three extents. Splitting may result in new extent allocation which probably will fail because of ENOSPC*/ lseek(fd, blksize*2 -1, SEEK_CUR); if ((ret = write(fd, 'a', 1)) != 1) exit(1); pos += blksize * 2; } Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-01-28ext4: Check for return value from sb_set_blocksizeAneesh Kumar K.V
sb_set_blocksize validates whether the specfied block size can be used by the file system. Make sure we fail mounting the file system if the blocksize specfied cannot be used. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com>
2008-01-28ext4: Add stripe= option to /proc/mountsMiklos Szeredi
Add stripe= option to /proc/mounts for ext4 filesystems. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Mingming Cao <cmm@us.ibm.com>
2008-01-28ext4: Enable the multiblock allocator by defaultAneesh Kumar K.V
Enable the multiblock allocator by default. Fix ext4_show_options() so if it is not enabled, the nomballoc option included in /proc/mounts. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-01-29ext4: Add multi block allocator for ext4Alex Tomas
Signed-off-by: Alex Tomas <alex@clusterfs.com> Signed-off-by: Andreas Dilger <adilger@clusterfs.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-01-28ext4: Add new functions for searching extent treeAlex Tomas
Add the functions ext4_ext_search_left() and ext4_ext_search_right(), which are used by mballoc during ext4_ext_get_blocks to decided whether to merge extent information. Signed-off-by: Alex Tomas <alex@clusterfs.com> Signed-off-by: Andreas Dilger <adilger@clusterfs.com> Signed-off-by: Johann Lombardi <johann@clusterfs.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-01-28ext4: fix up EXT4FS_DEBUG buildsEric Sandeen
Builds with EXT4FS_DEBUG defined (to enable ext4_debug()) fail without these changes. Clean up some format warnings too. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com>
2008-01-28ext4: Fix ext4_show_options to show the correct mount options.Aneesh Kumar K.V
We need to look at the default value and make sure the mount options are not set via default value before showing them via ext4_show_options Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2008-01-28ext4: Add EXT4_IOC_MIGRATE ioctlAneesh Kumar K.V
The below patch add ioctl for migrating ext3 indirect block mapped inode to ext4 extent mapped inode. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2008-01-28ext4: Add inode version support in ext4Jean Noel Cordenner
This patch adds 64-bit inode version support to ext4. The lower 32 bits are stored in the osd1.linux1.l_i_version field while the high 32 bits are stored in the i_version_hi field newly created in the ext4_inode. This field is incremented in case the ext4_inode is large enough. A i_version mount option has been added to enable the feature. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Andreas Dilger <adilger@clusterfs.com> Signed-off-by: Kalpak Shah <kalpak@clusterfs.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Jean Noel Cordenner <jean-noel.cordenner@bull.net>
2008-01-28vfs: Add 64 bit i_version supportJean Noel Cordenner
The i_version field of the inode is changed to be a 64-bit counter that is set on every inode creation and that is incremented every time the inode data is modified (similarly to the "ctime" time-stamp). The aim is to fulfill a NFSv4 requirement for rfc3530. This first part concerns the vfs, it converts the 32-bit i_version in the generic inode to a 64-bit, a flag is added in the super block in order to check if the feature is enabled and the i_version is incremented in the vfs. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Jean Noel Cordenner <jean-noel.cordenner@bull.net> Signed-off-by: Kalpak Shah <kalpak@clusterfs.com>
2008-01-28ext4: Add the journal checksum featureGirish Shilamkar
The journal checksum feature adds two new flags i.e JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT and JBD2_FEATURE_COMPAT_CHECKSUM. JBD2_FEATURE_CHECKSUM flag indicates that the commit block contains the checksum for the blocks described by the descriptor blocks. Due to checksums, writing of the commit record no longer needs to be synchronous. Now commit record can be sent to disk without waiting for descriptor blocks to be written to disk. This behavior is controlled using JBD2_FEATURE_ASYNC_COMMIT flag. Older kernels/e2fsck should not be able to recover the journal with _ASYNC_COMMIT hence it is made incompat. The commit header has been extended to hold the checksum along with the type of the checksum. For recovery in pass scan checksums are verified to ensure the sanity and completeness(in case of _ASYNC_COMMIT) of every transaction. Signed-off-by: Andreas Dilger <adilger@clusterfs.com> Signed-off-by: Girish Shilamkar <girish@clusterfs.com> Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com>
2008-01-28jbd2: jbd2 stats through procfsJohann Lombardi
The patch below updates the jbd stats patch to 2.6.20/jbd2. The initial patch was posted by Alex Tomas in December 2005 (http://marc.info/?l=linux-ext4&m=113538565128617&w=2). It provides statistics via procfs such as transaction lifetime and size. Sometimes, investigating performance problems, i find useful to have stats from jbd about transaction's lifetime, size, etc. here is a patch for review and inclusion probably. for example, stats after creation of 3M files in htree directory: [root@bob ~]# cat /proc/fs/jbd/sda/history R/C tid wait run lock flush log hndls block inlog ctime write drop close R 261 8260 2720 0 0 750 9892 8170 8187 C 259 750 0 4885 1 R 262 20 2200 10 0 770 9836 8170 8187 R 263 30 2200 10 0 3070 9812 8170 8187 R 264 0 5000 10 0 1340 0 0 0 C 261 8240 3212 4957 0 R 265 8260 1470 0 0 4640 9854 8170 8187 R 266 0 5000 10 0 1460 0 0 0 C 262 8210 2989 4868 0 R 267 8230 1490 10 0 4440 9875 8171 8188 R 268 0 5000 10 0 1260 0 0 0 C 263 7710 2937 4908 0 R 269 7730 1470 10 0 3330 9841 8170 8187 R 270 0 5000 10 0 830 0 0 0 C 265 8140 3234 4898 0 C 267 720 0 4849 1 R 271 8630 2740 20 0 740 9819 8170 8187 C 269 800 0 4214 1 R 272 40 2170 10 0 830 9716 8170 8187 R 273 40 2280 0 0 3530 9799 8170 8187 R 274 0 5000 10 0 990 0 0 0 where, R - line for transaction's life from T_RUNNING to T_FINISHED C - line for transaction's checkpointing tid - transaction's id wait - for how long we were waiting for new transaction to start (the longest period journal_start() took in this transaction) run - real transaction's lifetime (from T_RUNNING to T_LOCKED lock - how long we were waiting for all handles to close (time the transaction was in T_LOCKED) flush - how long it took to flush all data (data=ordered) log - how long it took to write the transaction to the log hndls - how many handles got to the transaction block - how many blocks got to the transaction inlog - how many blocks are written to the log (block + descriptors) ctime - how long it took to checkpoint the transaction write - how many blocks have been written during checkpointing drop - how many blocks have been dropped during checkpointing close - how many running transactions have been closed to checkpoint this one all times are in msec. [root@bob ~]# cat /proc/fs/jbd/sda/info 280 transaction, each upto 8192 blocks average: 1633ms waiting for transaction 3616ms running transaction 5ms transaction was being locked 1ms flushing data (in ordered mode) 1799ms logging transaction 11781 handles per transaction 5629 blocks per transaction 5641 logged blocks per transaction Signed-off-by: Johann Lombardi <johann.lombardi@bull.net> Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Eric Sandeen <sandeen@redhat.com>
2008-01-28ext4: Take read lock during overwrite case.Aneesh Kumar K.V
When we are overwriting a file and not actually allocating new file system blocks we need to take only the read lock on i_data_sem. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>