From ebcee4b5c9136096f64ee6f691a013d7c0a4bc34 Mon Sep 17 00:00:00 2001 From: Mark Fasheh Date: Mon, 28 Jul 2008 14:55:20 -0700 Subject: ocfs2: Track local alloc bits internally Do this instead of tracking absolute local alloc size. This avoids needless re-calculatiion of bits from bytes in localalloc.c. Additionally, the value is now in a more natural unit for internal file system bitmap work. Signed-off-by: Mark Fasheh --- fs/ocfs2/localalloc.c | 34 ++++++++++++---------------------- 1 file changed, 12 insertions(+), 22 deletions(-) (limited to 'fs/ocfs2/localalloc.c') diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c index 28e492e4ec8..b05ce664291 100644 --- a/fs/ocfs2/localalloc.c +++ b/fs/ocfs2/localalloc.c @@ -47,8 +47,6 @@ #define OCFS2_LOCAL_ALLOC(dinode) (&((dinode)->id2.i_lab)) -static inline int ocfs2_local_alloc_window_bits(struct ocfs2_super *osb); - static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc); static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb, @@ -75,21 +73,13 @@ static int ocfs2_local_alloc_new_window(struct ocfs2_super *osb, static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb, struct inode *local_alloc_inode); -static inline int ocfs2_local_alloc_window_bits(struct ocfs2_super *osb) -{ - BUG_ON(osb->s_clustersize_bits > 20); - - /* Size local alloc windows by the megabyte */ - return osb->local_alloc_size << (20 - osb->s_clustersize_bits); -} - /* * Tell us whether a given allocation should use the local alloc * file. Otherwise, it has to go to the main bitmap. */ int ocfs2_alloc_should_use_local(struct ocfs2_super *osb, u64 bits) { - int la_bits = ocfs2_local_alloc_window_bits(osb); + int la_bits = osb->local_alloc_bits; int ret = 0; if (osb->local_alloc_state != OCFS2_LA_ENABLED) @@ -120,14 +110,16 @@ int ocfs2_load_local_alloc(struct ocfs2_super *osb) mlog_entry_void(); - if (osb->local_alloc_size == 0) + if (osb->local_alloc_bits == 0) goto bail; - if (ocfs2_local_alloc_window_bits(osb) >= osb->bitmap_cpg) { + if (osb->local_alloc_bits >= osb->bitmap_cpg) { mlog(ML_NOTICE, "Requested local alloc window %d is larger " "than max possible %u. Using defaults.\n", - ocfs2_local_alloc_window_bits(osb), (osb->bitmap_cpg - 1)); - osb->local_alloc_size = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE; + osb->local_alloc_bits, (osb->bitmap_cpg - 1)); + osb->local_alloc_bits = + ocfs2_megabytes_to_clusters(osb->sb, + OCFS2_DEFAULT_LOCAL_ALLOC_SIZE); } /* read the alloc off disk */ @@ -190,8 +182,7 @@ bail: if (inode) iput(inode); - mlog(0, "Local alloc window bits = %d\n", - ocfs2_local_alloc_window_bits(osb)); + mlog(0, "Local alloc window bits = %d\n", osb->local_alloc_bits); mlog_exit(status); return status; @@ -490,7 +481,7 @@ int ocfs2_reserve_local_alloc_bits(struct ocfs2_super *osb, goto bail; } - if (bits_wanted > ocfs2_local_alloc_window_bits(osb)) { + if (bits_wanted > osb->local_alloc_bits) { mlog(0, "Asking for more than my max window size!\n"); status = -ENOSPC; goto bail; @@ -803,7 +794,7 @@ static int ocfs2_local_alloc_reserve_for_window(struct ocfs2_super *osb, goto bail; } - (*ac)->ac_bits_wanted = ocfs2_local_alloc_window_bits(osb); + (*ac)->ac_bits_wanted = osb->local_alloc_bits; status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); if (status < 0) { @@ -849,7 +840,7 @@ static int ocfs2_local_alloc_new_window(struct ocfs2_super *osb, "one\n"); mlog(0, "Allocating %u clusters for a new window.\n", - ocfs2_local_alloc_window_bits(osb)); + osb->local_alloc_bits); /* Instruct the allocation code to try the most recently used * cluster group. We'll re-record the group used this pass @@ -859,8 +850,7 @@ static int ocfs2_local_alloc_new_window(struct ocfs2_super *osb, /* we used the generic suballoc reserve function, but we set * everything up nicely, so there's no reason why we can't use * the more specific cluster api to claim bits. */ - status = ocfs2_claim_clusters(osb, handle, ac, - ocfs2_local_alloc_window_bits(osb), + status = ocfs2_claim_clusters(osb, handle, ac, osb->local_alloc_bits, &cluster_off, &cluster_count); if (status < 0) { if (status != -ENOSPC) -- cgit v1.2.3-70-g09d2