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[CIFS] Add writepages support to shrink memory usage on writes,

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eliminate the double copy, and improve cifs write performance and
help the server by upping the typical write size from 4K to 16K
(or even larger if wsize set explicitly)  for servers which support this.
Part 1 of 2

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Steve French  <sfrench@us.ibm.com>
This commit is contained in:
Steve French
2005-10-03 13:37:24 -07:00
parent 70ca734a14
commit 3e84469d01
5 changed files with 89 additions and 72 deletions
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4
fs/cifs/connect.c
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@ -1891,6 +1891,10 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
}
}
}
if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
cifs_sb->wsize = min(cifs_sb->wsize,
(tcon->ses->server->maxBuf -
MAX_CIFS_HDR_SIZE));
}
/* volume_info.password is freed above when existing session found