Messages in this thread | | | Date | Fri, 02 Mar 2001 14:38:56 -0500 | From | Chris Mason <> |
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On Friday, March 02, 2001 01:25:25 PM -0600 Steve Lord <lord@sgi.com> wrote:
>> For why ide is beating scsi in this benchmark...make sure tagged queueing >> is on (or increase the queue length?). For the xlog.c test posted, I >> would expect scsi to get faster than ide as the size of the write >> increases. > > I think the issue is the call being used now is going to get slower the > larger the device is, just from the point of view of how many buffers it > has to scan.
filemap_fdatawait, filemap_fdatasync, and fsync_inode_buffers all restrict their scans to a list of dirty buffers for that specific file. Only file_fsync goes through all the dirty buffers on the device, and the ext2 fsync path never calls file_fsync.
Or am I missing something?
-chris
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