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[CIFS] Make cifs default wsize match what we actually want to send (52K

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typically - header + 13 pages).

Forgetting to set wsize on the mount command costs more than 10% on large
write (can be much more) so this makes a saner default.  We still shrink
this default smaller if server can not support it.

Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French 2006-01-24 20:26:48 -08:00
parent 4c8af5254e
commit 17cbbafe8e
1 changed files with 9 additions and 1 deletions
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10
fs/cifs/connect.c
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@ -1785,7 +1785,15 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
} else if(volume_info.wsize)
cifs_sb->wsize = volume_info.wsize;
else
cifs_sb->wsize = CIFSMaxBufSize; /* default */
cifs_sb->wsize =
min(PAGEVEC_SIZE * PAGE_CACHE_SIZE, 127*1024);
/* old default of CIFSMaxBufSize was too small now
that SMB Write2 can send multiple pages in kvec.
RFC1001 does not describe what happens when frame
bigger than 128K is sent so use that as max in
conjunction with 52K kvec constraint on arch with 4K
page size */
if(cifs_sb->rsize < PAGE_CACHE_SIZE) {
cifs_sb->rsize = PAGE_CACHE_SIZE;
/* Windows ME does this */