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* [PATCH] nfs: fix congestion controlPeter Zijlstra2007-03-16
| | | | | | | | | | | | | | | | | | | The current NFS client congestion logic is severly broken, it marks the backing device congested during each nfs_writepages() call but doesn't mirror this in nfs_writepage() which makes for deadlocks. Also it implements its own waitqueue. Replace this by a more regular congestion implementation that puts a cap on the number of active writeback pages and uses the bdi congestion waitqueue. Also always use an interruptible wait since it makes sense to be able to SIGKILL the process even for mounts without 'intr'. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'master' of /home/trondmy/kernel/linux-2.6/Trond Myklebust2007-02-13
|\ | | | | | | | | | | | | | | | | | | Conflicts: net/sunrpc/auth_gss/gss_krb5_crypto.c net/sunrpc/auth_gss/gss_spkm3_token.c net/sunrpc/clnt.c Merge with mainline and fix conflicts.
| * [PATCH] mark struct inode_operations const 3Arjan van de Ven2007-02-12
| | | | | | | | | | | | | | | | | | | | | | Many struct inode_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | NFS: move NFS_DEBUG definitionBenny Halevy2007-02-03
|/ | | | | | | | | | | | | Trond, looks like the changes to include/linux/nfs_fs.h in 2.6.18 that moved the #include's of sunrpc header files into the #ifdef __KERNEL__ block disabled nfs debugging for all nfs c file not including any sunrpc header. The following patch moves the definition down, right before its use for defining ifdebug. Signed-off-by: Benny Halevy <bhalevy@panasas.com> (Moved definition further down into the __KERNEL__ section: Trond) Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* [PATCH] NFS: Fix races in nfs_revalidate_mapping()Trond Myklebust2007-01-24
| | | | | | | | Prevent the call to invalidate_inode_pages2() from racing with file writes by taking the inode->i_mutex across the page cache flush and invalidate. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* NFS: Ensure we only call set_page_writeback() under the page lockTrond Myklebust2006-12-06
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Ensure that nfs_wb_page() calls writepage when necessary.Trond Myklebust2006-12-06
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Add nfs_set_page_dirty()Trond Myklebust2006-12-06
| | | | | | | | | | We will want to allow nfs_writepage() to distinguish between pages that have been marked as dirty by the VM, and those that have been marked as dirty by nfs_updatepage(). In the former case, the entire page will want to be written out, and so any requests that were pending need to be flushed out first. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: cleanup of nfs_sync_inode_wait()Trond Myklebust2006-12-06
| | | | | | Allow callers to directly pass it a struct writeback_control. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Clean up nfs_scan_dirty()Trond Myklebust2006-12-06
| | | | | | Pass down struct writeback control. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* SUNRPC: Fix a potential race in rpc_wake_up_task()Trond Myklebust2006-12-06
| | | | | | | | Use RCU to ensure that we can safely call rpc_finish_wakeup after we've called __rpc_do_wake_up_task. If not, there is a theoretical race, in which the rpc_task finishes executing, and gets freed first. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* [NET]: ipconfig and nfsroot annotationsAl Viro2006-12-03
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PATCH] nfs: verifier is network-endianAl Viro2006-10-20
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] NFS: Deal with failure of invalidate_inode_pages2()Trond Myklebust2006-10-20
| | | | | | | | | | | | | | If invalidate_inode_pages2() fails, then it should in principle just be because the current process was signalled. In that case, we just want to ensure that the inode's page cache remains marked as invalid. Also add a helper to allow the O_DIRECT code to simply mark the page cache as invalid once it is finished writing, instead of calling invalidate_inode_pages2() itself. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Vectorize aio_read/aio_write fileop methodsBadari Pulavarty2006-10-01
| | | | | | | | | | | | This patch vectorizes aio_read() and aio_write() methods to prepare for collapsing all aio & vectored operations into one interface - which is aio_read()/aio_write(). Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Michael Holzheu <HOLZHEU@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fs/nfs/: make code staticAdrian Bunk2006-09-27
| | | | | | | Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Move several *_SUPER_MAGIC symbols to include/linux/magic.h.Jeff Garzik2006-09-24
| | | | Signed-off-by: Jeff Garzik <jeff@garzik.org>
* SUNRPC: Clean-up after previous patches.Chuck Lever2006-09-22
| | | | | | | | | | Remove some unused macros related to accessing an RPC peer address Test plan: Compile kernel with CONFIG_NFS option enabled. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Move rpc_ops from nfs_server to nfs_clientDavid Howells2006-09-22
| | | | | | | | Move the rpc_ops from the nfs_server struct to the nfs_client struct as they're common to all server records of a particular NFS protocol version. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Generalise the nfs_client structureDavid Howells2006-09-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Generalise the nfs_client structure by: (1) Moving nfs_client to a more general place (nfs_fs_sb.h). (2) Renaming its maintenance routines to be non-NFS4 specific. (3) Move those maintenance routines to a new non-NFS4 specific file (client.c) and move the declarations to internal.h. (4) Make nfs_find/get_client() take a full sockaddr_in to include the port number (will be required for NFS2/3). (5) Make nfs_find/get_client() take the NFS protocol version (again will be required to differentiate NFS2, 3 & 4 client records). Also: (6) Make nfs_client construction proceed akin to inodes, marking them as under construction and providing a function to indicate completion. (7) Make nfs_get_client() wait interruptibly if it finds a client that it can share, but that client is currently being constructed. (8) Make nfs4_create_client() use (6) and (7) instead of locking cl_sem. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Add a global LRU list for the ACCESS cacheTrond Myklebust2006-09-22
| | | | | | ...in order to allow the addition of a memory shrinker. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Add a new ACCESS rpc call cache to the linux nfs clientTrond Myklebust2006-09-22
| | | | | | | | | | | The current access cache only allows one entry at a time to be cached for each inode. Add a per-inode red-black tree in order to allow more than one to be cached at a time. Should significantly cut down the time spent in path traversal for shared directories such as ${PATH}, /usr/share, etc. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* [PATCH] headers_check: reduce user-visible noise in <linux/nfs_fs.h>David Woodhouse2006-09-13
| | | | | | | | | | | | | | | | | We don't need any of this crap included from the user-visible part of nfs_fs.h -- remove it all. In fact, we probably don't need anything but NFS_SUPER_MAGIC to be defined; is there any need for anything else? And magic numbers should probably move to <linux/magic.h> rather than being strewn across various fs-specific include files which exist in userspace for solely that purpose. With this patch, 'make header_check' works again at least on PowerPC. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] NFS: large non-page-aligned direct I/O clobbers memoryTrond Myklebust2006-09-08
| | | | | | | | | | | | | | | | | The logic in nfs_direct_read_schedule and nfs_direct_write_schedule can allow data->npages to be one larger than rpages. This causes a page pointer to be written beyond the end of the pagevec in nfs_read_data (or nfs_write_data). Fix this by making nfs_(read|write)_alloc() calculate the size of the pagevec array, and initialise data->npages. Also get rid of the redundant argument to nfs_commit_alloc(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* NFS: make 2 functions staticAdrian Bunk2006-08-03
| | | | | | | | | | nfs_writedata_free() and nfs_readdata_free() can now become static. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> (cherry picked from 5e1ce40f0c3c8f67591aff17756930d7a18ceb1a commit)
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-30
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [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>
* git-nfs-build-fixesAndrew Morton2006-06-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix various problems with nfs4 disabled. And various other things. In file included from fs/nfs/inode.c:50: fs/nfs/internal.h:24: error: static declaration of 'nfs_do_refmount' follows non-static declaration include/linux/nfs_fs.h:320: error: previous declaration of 'nfs_do_refmount' was here fs/nfs/internal.h:65: warning: 'struct nfs4_fs_locations' declared inside parameter list fs/nfs/internal.h:65: warning: its scope is only this definition or declaration, which is probably not what you want fs/nfs/internal.h: In function 'nfs4_path': fs/nfs/internal.h:97: error: 'struct nfs_server' has no member named 'mnt_path' fs/nfs/inode.c: In function 'init_once': fs/nfs/inode.c:1116: error: 'struct nfs_inode' has no member named 'open_states' fs/nfs/inode.c:1116: error: 'struct nfs_inode' has no member named 'delegation' fs/nfs/inode.c:1116: error: 'struct nfs_inode' has no member named 'delegation_state' fs/nfs/inode.c:1116: error: 'struct nfs_inode' has no member named 'rwsem' distcc[26452] ERROR: compile fs/nfs/inode.c on g5/64 failed make[1]: *** [fs/nfs/inode.o] Error 1 make: *** [fs/nfs/inode.o] Error 2 make: *** Waiting for unfinished jobs.... In file included from fs/nfs/nfs3xdr.c:26: fs/nfs/internal.h:24: error: static declaration of 'nfs_do_refmount' follows non-static declaration include/linux/nfs_fs.h:320: error: previous declaration of 'nfs_do_refmount' was here fs/nfs/internal.h:65: warning: 'struct nfs4_fs_locations' declared inside parameter list fs/nfs/internal.h:65: warning: its scope is only this definition or declaration, which is probably not what you want fs/nfs/internal.h: In function 'nfs4_path': fs/nfs/internal.h:97: error: 'struct nfs_server' has no member named 'mnt_path' distcc[26486] ERROR: compile fs/nfs/nfs3xdr.c on g5/64 failed make[1]: *** [fs/nfs/nfs3xdr.o] Error 1 make: *** [fs/nfs/nfs3xdr.o] Error 2 In file included from fs/nfs/nfs3proc.c:24: fs/nfs/internal.h:24: error: static declaration of 'nfs_do_refmount' follows non-static declaration include/linux/nfs_fs.h:320: error: previous declaration of 'nfs_do_refmount' was here fs/nfs/internal.h:65: warning: 'struct nfs4_fs_locations' declared inside parameter list fs/nfs/internal.h:65: warning: its scope is only this definition or declaration, which is probably not what you want fs/nfs/internal.h: In function 'nfs4_path': fs/nfs/internal.h:97: error: 'struct nfs_server' has no member named 'mnt_path' distcc[26469] ERROR: compile fs/nfs/nfs3proc.c on bix/32 failed make[1]: *** [fs/nfs/nfs3proc.o] Error 1 make: *** [fs/nfs/nfs3proc.o] Error 2 **FAILED** Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Andreas Gruenbacher <agruen@suse.de> Cc: Andy Adamson <andros@citi.umich.edu> Cc: Chuck Lever <cel@netapp.com> Cc: David Howells <dhowells@redhat.com> Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Manoj Naik <manoj@almaden.ibm.com> Cc: Marc Eshel <eshel@almaden.ibm.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Follow a referralManoj Naik2006-06-09
| | | | | | | | | | | Respond to a moved error on NFS lookup by setting up the referral. Note: We don't actually follow the referral during lookup/getattr, but later when we detect fsid mismatch in inode revalidation (similar to the processing done for cloning submounts). Referrals will have fake attributes until they are actually followed or traversed. Signed-off-by: Manoj Naik <manoj@almaden.ibm.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Ensure client submounts when following a referralManoj Naik2006-06-09
| | | | | | | | Set up mountpoint when hitting a referral on moved error by getting fs_locations. Signed-off-by: Manoj Naik <manoj@almaden.ibm.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Add timeout to submountsTrond Myklebust2006-06-09
| | | | | | | Make automounted partitions expire using the mark_mounts_for_expiry() function. The timeout is controlled via a sysctl. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Ensure the client submounts, when it crosses a server mountpoint.Trond Myklebust2006-06-09
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Store the file system "fsid" value in the NFS super block.Trond Myklebust2006-06-09
| | | | | | | This should enable us to detect if we are crossing a mountpoint in the case where the server is exporting "nohide" mounts. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Flesh out nfs_invalidate_page()Trond Myklebust2006-06-09
| | | | | | | In the case of a call to truncate_inode_pages(), we should really try to cancel any pending writes on the page. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Separate metadata and page cache revalidation mechanismsTrond Myklebust2006-06-09
| | | | | | | | | | Separate out the function of revalidating the inode metadata, and revalidating the mapping. The former may be called by lookup(), and only really needs to check that permissions, ctime, etc haven't changed whereas the latter needs only done when we want to read data from the page cache, and may need to sync and then invalidate the mapping. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: More page cache revalidation fixupsTrond Myklebust2006-06-09
| | | | | | | | Whenever the directory changes, we want to make sure that we always invalidate its page cache. Fix up update_changeattr() and nfs_mark_for_revalidate() so that they do so. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* [PATCH] Make most file operations structs in fs/ constArjan van de Ven2006-03-28
| | | | | | | | | | | | | | This is a conversion to make the various file_operations structs in fs/ const. Basically a regexp job, with a few manual fixups The goal is both to increase correctness (harder to accidentally write to shared datastructures) and reducing the false sharing of cachelines with things that get dirty in .data (while .rodata is nicely read only and thus cache clean) Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* NFS: Fix a race in nfs_sync_inode()Trond Myklebust2006-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | Kudos to Neil Brown for spotting the problem: "in nfs_sync_inode, there is effectively the sequence: nfs_wait_on_requests nfs_flush_inode nfs_commit_inode This seems a bit racy to me as if the only requests are on the ->commit list, and nfs_commit_inode is called separately after nfs_wait_on_requests completes, and before nfs_commit_inode start (say: by nfs_write_inode) then none of these function will return >0, yet there will be some pending request that aren't waited for." The solution is to search for requests to wait upon, search for dirty requests, and search for uncommitted requests while holding the nfsi->req_lock The patch also cleans up nfs_sync_inode(), getting rid of the redundant FLUSH_WAIT flag. It turns out that we were always setting it. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Uninline nfs_writedata_(alloc|free) and nfs_readdata_(alloc|free)Trond Myklebust2006-03-20
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: Use UNSTABLE + COMMIT for NFS O_DIRECT writesTrond Myklebust2006-03-20
| | | | | | | | | | | | | | | | | | Currently NFS O_DIRECT writes use FILE_SYNC so that a COMMIT is not necessary. This simplifies the internal logic, but this could be a difficult workload for some servers. Instead, let's send UNSTABLE writes, and after they all complete, send a COMMIT for the dirty range. After the COMMIT returns successfully, then do the wake_up or fire off aio_complete(). Test plan: Async direct I/O tests against Solaris (or any server that requires committed unstable writes). Reboot server during test. Based on an earlier patch by Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Make nfs_commit_alloc() externTrond Myklebust2006-03-20
| | | | | | We need to use nfs_commit_alloc() in fs/nfs/direct.c. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: make direct write path generate write requests concurrentlyChuck Lever2006-03-20
| | | | | | | | | | | | | | | | | Duplicate infrastructure from direct read path that will allow write path to generate multiple write requests concurrently. This will enable us to add support for aio in this path. Temporarily we will lose the ability to do UNSTABLE writes followed by a COMMIT in the direct write path. However, all applications I am aware of that use NFS O_DIRECT currently write in relatively small chunks, so this should not be inconvenient in any way. Test plan: Millions of fsx-odirect ops. OraSim. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Cleanup of NFS read codeTrond Myklebust2006-03-20
| | | | | | | | Same callback hierarchy inversion as for the NFS write calls. This patch is not strictly speaking needed by the O_DIRECT code, but avoids confusing differences between the asynchronous read and write code. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Cleanup of NFS write code in preparation for asynchronous o_directTrond Myklebust2006-03-20
| | | | | | | | | | | | | | | | | This patch inverts the callback hierarchy for NFS write calls. Instead of having the NFSv2/v3/v4-specific code set up the RPC callback ops, we allow the original caller to do so. This allows for more flexibility w.r.t. how to set up and tear down the nfs_write_data structure while still allowing the NFSv3/v4 code to perform error handling. The greater flexibility is needed by the asynchronous O_DIRECT code, which wants to be able to hold on to the original nfs_write_data structures after the WRITE RPC call has completed in order to be able to replay them if the COMMIT call determines that the server has rebooted. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Code comments update in NFSGoldwyn Rodrigues2006-03-20
| | | | | | | | read_cache_mtime is no longer used in nfs_inode. This patch removes references of read_cache_mtime in the code comments. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@gmail.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix a busy inodes issue...Trond Myklebust2006-03-20
| | | | | | | | | | | The nfs_open_context may live longer than the file descriptor that spawned it, so it needs to carry a reference to the vfsmount. If not, then generic_shutdown_super() may end up being called before reads and writes have been flushed out. Make a couple of functions static while we're at it... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* [PATCH] Fix compile for CONFIG_SYSVIPC=n or CONFIG_SYSCTL=nStephen Rothwell2006-02-20
| | | | | | | | | | | | | | The compat syscalls are added to sys_ni.c since they are not defined if the above CONFIG options are off. Also, nfs would not build with CONFIG_SYSCTL off. Noticed by Arthur Othieno. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: "David S. Miller" <davem@davemloft.net> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* NFSv4: Allow user to set the port used by the NFSv4 callback channelTrond Myklebust2006-01-06
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Make stat() return updated mtimes after a write()Trond Myklebust2006-01-06
| | | | | | | | | The SuS states that a call to write() will cause mtime to be updated on the file. In order to satisfy that requirement, we need to flush out any cached writes in nfs_getattr(). Speed things up slightly by not committing the writes. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: support large reads and writes on the wireChuck Lever2006-01-06
| | | | | | | | | | | | | | | | | Most NFS server implementations allow up to 64KB reads and writes on the wire. The Solaris NFS server allows up to a megabyte, for instance. Now the Linux NFS client supports transfer sizes up to 1MB, too. This will help reduce protocol and context switch overhead on read/write intensive NFS workloads, and support larger atomic read and write operations on servers that support them. Test-plan: Connectathon and iozone on mount point with wsize=rsize>32768 over TCP. Tests with NFS over UDP to verify the maximum RPC payload size cap. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-25 16:44:30 -0500