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authorDavid Woodhouse <dwmw2@infradead.org>2007-10-06 15:12:58 -0400
committerDavid Woodhouse <dwmw2@infradead.org>2007-10-06 15:12:58 -0400
commit8fb870df5a1f261294b833dd807bcba3bacface6 (patch)
tree2e6018f0256feca906797b248603202962302fa6 /fs/jffs2/jffs2_fs_sb.h
parent49defc015ff58fda46a3afa3462dfdfa69bc8401 (diff)
downloadop-kernel-dev-8fb870df5a1f261294b833dd807bcba3bacface6.zip
op-kernel-dev-8fb870df5a1f261294b833dd807bcba3bacface6.tar.gz
[JFFS2] Trigger garbage collection when very_dirty_list size becomes excessive
With huge amounts of free space, we weren't bothering to GC for while a while, and pathological numbers of obsolete nodes were accumulating, seriously affecting performance on NAND flash (OLPC trac #3978) Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'fs/jffs2/jffs2_fs_sb.h')
-rw-r--r--fs/jffs2/jffs2_fs_sb.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/jffs2/jffs2_fs_sb.h b/fs/jffs2/jffs2_fs_sb.h
index ae99cd7..3a2197f 100644
--- a/fs/jffs2/jffs2_fs_sb.h
+++ b/fs/jffs2/jffs2_fs_sb.h
@@ -69,6 +69,8 @@ struct jffs2_sb_info {
uint8_t resv_blocks_gctrigger; /* ... wake up the GC thread */
uint8_t resv_blocks_gcbad; /* ... pick a block from the bad_list to GC */
uint8_t resv_blocks_gcmerge; /* ... merge pages when garbage collecting */
+ /* Number of 'very dirty' blocks before we trigger immediate GC */
+ uint8_t vdirty_blocks_gctrigger;
uint32_t nospc_dirty_size;
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