apfs/linux-apfs
0
0
Fork 0
mirror of https://github.com/linux-apfs/linux-apfs.git synced 2026-05-01 15:00:59 -07:00
Code Issues Packages Projects Releases Wiki Activity

sh: Lazy dcache writeback optimizations.

Browse Source 
This converts the lazy dcache handling to the model described in
Documentation/cachetlb.txt and drops the ptep_get_and_clear() hacks
used for the aliasing dcaches on SH-4 and SH7705 in 32kB mode. As a
bonus, this slightly cuts down on the cache flushing frequency.

With that and the PTEA handling out of the way, the update_mmu_cache()
implementations can be consolidated, and we no longer have to worry
about which configuration the cache is in for the SH7705 case.

And finally, explicitly disable the lazy writeback on SMP (SH-4A).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2006-12-28 10:31:48 +09:00
parent 7a847f8190
commit 26b7a78c55
13 changed files with 79 additions and 209 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/asm-sh/cacheflush.h
+3
View File
@@ -30,5 +30,8 @@ extern void __flush_invalidate_region(void *start, int size);
#define HAVE_ARCH_UNMAPPED_AREA
/* Page flag for lazy dcache write-back for the aliasing UP caches */
#define PG_dcache_dirty PG_arch_1
#endif /* __KERNEL__ */
#endif /* __ASM_SH_CACHEFLUSH_H */