[PATCH] JFS: Changes for larger page size
JFS code has always assumed a page size of 4K. This patch fixes the
non-pagecache uses of pages to deal with larger pages.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index b6a6869..e0f867dd 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -1669,6 +1669,7 @@
lp->h.eor = lp->t.eor = cpu_to_le16(bp->l_eor);
lbmWrite(log, log->bp, lbmWRITE | lbmRELEASE | lbmSYNC, 0);
lbmIOWait(log->bp, lbmFREE);
+ log->bp = NULL;
/*
* synchronous update log superblock
@@ -1819,20 +1820,34 @@
log->lbuf_free = NULL;
- for (i = 0; i < LOGPAGES; i++) {
- lbuf = kmalloc(sizeof(struct lbuf), GFP_KERNEL);
- if (lbuf == 0)
- goto error;
- lbuf->l_ldata = (char *) get_zeroed_page(GFP_KERNEL);
- if (lbuf->l_ldata == 0) {
- kfree(lbuf);
- goto error;
- }
- lbuf->l_log = log;
- init_waitqueue_head(&lbuf->l_ioevent);
+ for (i = 0; i < LOGPAGES;) {
+ char *buffer;
+ uint offset;
+ struct page *page;
- lbuf->l_freelist = log->lbuf_free;
- log->lbuf_free = lbuf;
+ buffer = (char *) get_zeroed_page(GFP_KERNEL);
+ if (buffer == NULL)
+ goto error;
+ page = virt_to_page(buffer);
+ for (offset = 0; offset < PAGE_SIZE; offset += LOGPSIZE) {
+ lbuf = kmalloc(sizeof(struct lbuf), GFP_KERNEL);
+ if (lbuf == NULL) {
+ if (offset == 0)
+ free_page((unsigned long) buffer);
+ goto error;
+ }
+ if (offset) /* we already have one reference */
+ get_page(page);
+ lbuf->l_offset = offset;
+ lbuf->l_ldata = buffer + offset;
+ lbuf->l_page = page;
+ lbuf->l_log = log;
+ init_waitqueue_head(&lbuf->l_ioevent);
+
+ lbuf->l_freelist = log->lbuf_free;
+ log->lbuf_free = lbuf;
+ i++;
+ }
}
return (0);
@@ -1857,12 +1872,10 @@
lbuf = log->lbuf_free;
while (lbuf) {
struct lbuf *next = lbuf->l_freelist;
- free_page((unsigned long) lbuf->l_ldata);
+ __free_page(lbuf->l_page);
kfree(lbuf);
lbuf = next;
}
-
- log->bp = NULL;
}
@@ -1974,9 +1987,9 @@
bio->bi_sector = bp->l_blkno << (log->l2bsize - 9);
bio->bi_bdev = log->bdev;
- bio->bi_io_vec[0].bv_page = virt_to_page(bp->l_ldata);
+ bio->bi_io_vec[0].bv_page = bp->l_page;
bio->bi_io_vec[0].bv_len = LOGPSIZE;
- bio->bi_io_vec[0].bv_offset = 0;
+ bio->bi_io_vec[0].bv_offset = bp->l_offset;
bio->bi_vcnt = 1;
bio->bi_idx = 0;
@@ -2115,9 +2128,9 @@
bio = bio_alloc(GFP_NOFS, 1);
bio->bi_sector = bp->l_blkno << (log->l2bsize - 9);
bio->bi_bdev = log->bdev;
- bio->bi_io_vec[0].bv_page = virt_to_page(bp->l_ldata);
+ bio->bi_io_vec[0].bv_page = bp->l_page;
bio->bi_io_vec[0].bv_len = LOGPSIZE;
- bio->bi_io_vec[0].bv_offset = 0;
+ bio->bi_io_vec[0].bv_offset = bp->l_offset;
bio->bi_vcnt = 1;
bio->bi_idx = 0;
@@ -2127,16 +2140,13 @@
bio->bi_private = bp;
/* check if journaling to disk has been disabled */
- if (!log->no_integrity) {
+ if (log->no_integrity) {
+ bio->bi_size = 0;
+ lbmIODone(bio, 0, 0);
+ } else {
submit_bio(WRITE_SYNC, bio);
INCREMENT(lmStat.submitted);
}
- else {
- bio->bi_size = 0;
- lbmIODone(bio, 0, 0); /* 2nd argument appears to not be used => 0
- * 3rd argument appears to not be used => 0
- */
- }
}