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| author | Hauke Mehrtens <hauke@hauke-m.de> | 2016-04-02 14:36:10 +0200 |
|---|---|---|
| committer | Hauke Mehrtens <hauke@hauke-m.de> | 2016-06-26 18:22:23 +0200 |
| commit | bf32177a1df123aa9b33c105d8895c81be81167a (patch) | |
| tree | 9e9bfd212c7bdd6205697dcb8254a928a2000d5c /target/linux/lantiq | |
| parent | 2abb02419d3c79d3ee8e732bccfd96a7fc959347 (diff) | |
| download | upstream-bf32177a1df123aa9b33c105d8895c81be81167a.tar.gz upstream-bf32177a1df123aa9b33c105d8895c81be81167a.tar.bz2 upstream-bf32177a1df123aa9b33c105d8895c81be81167a.zip | |
kernel: remove full cache flush in fuse_copy_do() for MIPS
This patch was introduced in commit r16412 for the brcm47xx target only
and then moved to generic in commit r32395. It was initially added
because of ticket #5186 and should fix some problems with fuse file
systems and MIPS caches. The commit comment in r32395 says that this a
generic problem in MIPS CPUs, but does not name any specifics about
that. There was a fix added to kernel 2.6.21 in commit commit
7575a49f20 "[MIPS] Implement flush_anon_page()." that should fix this
problem, but that was already available before both commits were done
to OpenWrt.
I just tested fuse with ntfs.3g without this patch on a BCM4704
(BMIPS3300 V0.6) SoC and haven't seen any problems. Someone reported
that removing this patch improves some fuse operations by 5 times on
some modern MIPS cores.
My test was only a simple "dd if=/dev/zero of=/mnt/zero bs=5000" to an
USB stick.
This patch removes the patch to OpenWrt, because I assume that it is
not needed any more and Felix, the orginal author, also thinks so.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Diffstat (limited to 'target/linux/lantiq')
| -rw-r--r-- | target/linux/lantiq/patches-4.4/0004-MIPS-lantiq-add-atm-hack.patch | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/target/linux/lantiq/patches-4.4/0004-MIPS-lantiq-add-atm-hack.patch b/target/linux/lantiq/patches-4.4/0004-MIPS-lantiq-add-atm-hack.patch index 6b97f395ec..53809d0a8f 100644 --- a/target/linux/lantiq/patches-4.4/0004-MIPS-lantiq-add-atm-hack.patch +++ b/target/linux/lantiq/patches-4.4/0004-MIPS-lantiq-add-atm-hack.patch @@ -441,7 +441,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org> { --- a/arch/mips/mm/cache.c +++ b/arch/mips/mm/cache.c -@@ -60,6 +60,8 @@ void (*_dma_cache_wback)(unsigned long s +@@ -59,6 +59,8 @@ void (*_dma_cache_wback)(unsigned long s void (*_dma_cache_inv)(unsigned long start, unsigned long size); EXPORT_SYMBOL(_dma_cache_wback_inv); |