forked from luck/tmp_suning_uos_patched
c2549f8c7a
Orangefs wins when it can do IO on large (up to four meg) blocks at a time, and looses when it has to do tiny "small io" reads and writes. Accessing Orangefs through the pagecache with the kernel module helps with small io, both reading and writing, a great deal. Readpage generally tries to fetch a page (four k) at a time. We'll let users use "count" (as in read(2) or pread(2) for example) as a knob to control how much data they get from Orangefs at a time and we'll try to use the data to fill extra pagecache pages when we get to ->readpage, hopefully resulting in fewer calls to readpage and Orangefs userspace. We need a way to remember how they set count so that we can still have it available when we get to ->readpage. - We'll use file->private_data to keep track of "count". We'll wrap generic_file_open with orangefs_file_open and initialize private_data to NULL there. - In ->read_iter we have access to both "count" and file, so we'll kmalloc some space onto file->private_data and store "count" there. - We'll kfree file->private_data each time we visit ->flush and reinitialize it to NULL. Signed-off-by: Mike Marshall <hubcap@omnibond.com> Signed-off-by: Martin Brandenburg <martin@omnibond.com> |
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| .. | ||
| acl.c | ||
| dcache.c | ||
| devorangefs-req.c | ||
| dir.c | ||
| downcall.h | ||
| file.c | ||
| inode.c | ||
| Kconfig | ||
| Makefile | ||
| namei.c | ||
| orangefs-bufmap.c | ||
| orangefs-bufmap.h | ||
| orangefs-cache.c | ||
| orangefs-debug.h | ||
| orangefs-debugfs.c | ||
| orangefs-debugfs.h | ||
| orangefs-dev-proto.h | ||
| orangefs-kernel.h | ||
| orangefs-mod.c | ||
| orangefs-sysfs.c | ||
| orangefs-sysfs.h | ||
| orangefs-utils.c | ||
| protocol.h | ||
| super.c | ||
| symlink.c | ||
| upcall.h | ||
| waitqueue.c | ||
| xattr.c | ||