[PATCH v2] erofs: remove useless cache strategy of DELAYEDALLOC
From: Yue Hu
Date: Sat Nov 06 2021 - 04:28:47 EST
DELAYEDALLOC is not used at all, remove related dead code. Also,
remove the blank line at the end of zdata.h.
Signed-off-by: Yue Hu <huyue2@xxxxxxxxxx>
---
v2: remove the blank line at the end of zdata.h.
fs/erofs/zdata.c | 20 --------------------
fs/erofs/zdata.h | 1 -
2 files changed, 21 deletions(-)
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index bcb1b91b234f..812c7c6ae456 100644
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -96,16 +96,9 @@ static void z_erofs_free_pcluster(struct z_erofs_pcluster *pcl)
DBG_BUGON(1);
}
-/*
- * a compressed_pages[] placeholder in order to avoid
- * being filled with file pages for in-place decompression.
- */
-#define PAGE_UNALLOCATED ((void *)0x5F0E4B1D)
-
/* how to allocate cached pages for a pcluster */
enum z_erofs_cache_alloctype {
DONTALLOC, /* don't allocate any cached pages */
- DELAYEDALLOC, /* delayed allocation (at the time of submitting io) */
/*
* try to use cached I/O if page allocation succeeds or fallback
* to in-place I/O instead to avoid any direct reclaim.
@@ -267,10 +260,6 @@ static void preload_compressed_pages(struct z_erofs_collector *clt,
/* I/O is needed, no possible to decompress directly */
standalone = false;
switch (type) {
- case DELAYEDALLOC:
- t = tagptr_init(compressed_page_t,
- PAGE_UNALLOCATED);
- break;
case TRYALLOC:
newpage = erofs_allocpage(pagepool, gfp);
if (!newpage)
@@ -1089,15 +1078,6 @@ static struct page *pickup_page_for_submission(struct z_erofs_pcluster *pcl,
if (!page)
goto out_allocpage;
- /*
- * the cached page has not been allocated and
- * an placeholder is out there, prepare it now.
- */
- if (page == PAGE_UNALLOCATED) {
- tocache = true;
- goto out_allocpage;
- }
-
/* process the target tagged pointer */
t = tagptr_init(compressed_page_t, page);
justfound = tagptr_unfold_tags(t);
diff --git a/fs/erofs/zdata.h b/fs/erofs/zdata.h
index 879df5362777..4a69515dea75 100644
--- a/fs/erofs/zdata.h
+++ b/fs/erofs/zdata.h
@@ -179,4 +179,3 @@ static inline void z_erofs_onlinepage_endio(struct page *page)
#define Z_EROFS_VMAP_GLOBAL_PAGES 2048
#endif
-
--
2.17.1