* + zsmalloc-expand-class-bit.patch added to -mm tree
@ 2017-04-13 20:29 akpm
0 siblings, 0 replies; 2+ messages in thread
From: akpm @ 2017-04-13 20:29 UTC (permalink / raw)
To: minchan, sergey.senozhatsky, stable, mm-commits
The patch titled
Subject: zsmalloc: expand class bit
has been added to the -mm tree. Its filename is
zsmalloc-expand-class-bit.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/zsmalloc-expand-class-bit.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/zsmalloc-expand-class-bit.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Minchan Kim <minchan@kernel.org>
Subject: zsmalloc: expand class bit
Now 64K page system, zsamlloc has 257 classes so 8 class bit is not
enough. With that, it corrupts the system when zsmalloc stores 65536byte
data(ie, index number 256) so that this patch increases class bit for
simple fix for stable backport. We should clean up this mess soon.
index size
0 32
1 288
..
..
204 52256
256 65536
Fixes: 3783689a1 ("zsmalloc: introduce zspage structure")
Link: http://lkml.kernel.org/r/1492042622-12074-3-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/zsmalloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/zsmalloc.c~zsmalloc-expand-class-bit mm/zsmalloc.c
--- a/mm/zsmalloc.c~zsmalloc-expand-class-bit
+++ a/mm/zsmalloc.c
@@ -276,7 +276,7 @@ struct zs_pool {
struct zspage {
struct {
unsigned int fullness:FULLNESS_BITS;
- unsigned int class:CLASS_BITS;
+ unsigned int class:CLASS_BITS + 1;
unsigned int isolated:ISOLATED_BITS;
unsigned int magic:MAGIC_VAL_BITS;
};
_
Patches currently in -mm which might be from minchan@kernel.org are
zram-fix-operator-precedence-to-get-offset.patch
zram-do-not-use-copy_page-with-non-page-alinged-address.patch
zsmalloc-expand-class-bit.patch
mm-reclaim-madv_free-pages-fix.patch
mm-fix-lazyfree-bug-on-check-in-try_to_unmap_one.patch
mm-fix-lazyfree-bug-on-check-in-try_to_unmap_one-fix.patch
mm-do-not-use-double-negation-for-testing-page-flags.patch
mm-remove-unncessary-ret-in-page_referenced.patch
mm-remove-swap_dirty-in-ttu.patch
mm-remove-swap_mlock-check-for-swap_success-in-ttu.patch
mm-make-the-try_to_munlock-void-function.patch
mm-make-the-try_to_munlock-void-function-fix.patch
mm-remove-swap_mlock-in-ttu.patch
mm-remove-swap_again-in-ttu.patch
mm-make-ttus-return-boolean.patch
mm-make-rmap_walk-void-function.patch
mm-make-rmap_one-boolean-function.patch
mm-remove-swap_.patch
mm-remove-swap_-fix.patch
zram-handle-multiple-pages-attached-bios-bvec.patch
zram-partial-io-refactoring.patch
zram-use-zram_slot_lock-instead-of-raw-bit_spin_lock-op.patch
zram-remove-zram_meta-structure.patch
zram-introduce-zram-data-accessor.patch
zram-use-zram_free_page-instead-of-open-coded.patch
^ permalink raw reply [flat|nested] 2+ messages in thread
* + zsmalloc-expand-class-bit.patch added to -mm tree
@ 2017-04-13 20:29 akpm
0 siblings, 0 replies; 2+ messages in thread
From: akpm @ 2017-04-13 20:29 UTC (permalink / raw)
To: minchan, sergey.senozhatsky, stable, mm-commits
The patch titled
Subject: zsmalloc: expand class bit
has been added to the -mm tree. Its filename is
zsmalloc-expand-class-bit.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/zsmalloc-expand-class-bit.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/zsmalloc-expand-class-bit.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Minchan Kim <minchan@kernel.org>
Subject: zsmalloc: expand class bit
Now 64K page system, zsamlloc has 257 classes so 8 class bit is not
enough. With that, it corrupts the system when zsmalloc stores 65536byte
data(ie, index number 256) so that this patch increases class bit for
simple fix for stable backport. We should clean up this mess soon.
index size
0 32
1 288
..
..
204 52256
256 65536
Fixes: 3783689a1 ("zsmalloc: introduce zspage structure")
Link: http://lkml.kernel.org/r/1492042622-12074-3-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/zsmalloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/zsmalloc.c~zsmalloc-expand-class-bit mm/zsmalloc.c
--- a/mm/zsmalloc.c~zsmalloc-expand-class-bit
+++ a/mm/zsmalloc.c
@@ -276,7 +276,7 @@ struct zs_pool {
struct zspage {
struct {
unsigned int fullness:FULLNESS_BITS;
- unsigned int class:CLASS_BITS;
+ unsigned int class:CLASS_BITS + 1;
unsigned int isolated:ISOLATED_BITS;
unsigned int magic:MAGIC_VAL_BITS;
};
_
Patches currently in -mm which might be from minchan@kernel.org are
zram-fix-operator-precedence-to-get-offset.patch
zram-do-not-use-copy_page-with-non-page-alinged-address.patch
zsmalloc-expand-class-bit.patch
mm-reclaim-madv_free-pages-fix.patch
mm-fix-lazyfree-bug-on-check-in-try_to_unmap_one.patch
mm-fix-lazyfree-bug-on-check-in-try_to_unmap_one-fix.patch
mm-do-not-use-double-negation-for-testing-page-flags.patch
mm-remove-unncessary-ret-in-page_referenced.patch
mm-remove-swap_dirty-in-ttu.patch
mm-remove-swap_mlock-check-for-swap_success-in-ttu.patch
mm-make-the-try_to_munlock-void-function.patch
mm-make-the-try_to_munlock-void-function-fix.patch
mm-remove-swap_mlock-in-ttu.patch
mm-remove-swap_again-in-ttu.patch
mm-make-ttus-return-boolean.patch
mm-make-rmap_walk-void-function.patch
mm-make-rmap_one-boolean-function.patch
mm-remove-swap_.patch
mm-remove-swap_-fix.patch
zram-handle-multiple-pages-attached-bios-bvec.patch
zram-partial-io-refactoring.patch
zram-use-zram_slot_lock-instead-of-raw-bit_spin_lock-op.patch
zram-remove-zram_meta-structure.patch
zram-introduce-zram-data-accessor.patch
zram-use-zram_free_page-instead-of-open-coded.patch
^ permalink raw reply [flat|nested] 2+ messages in thread
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2017-04-13 20:29 + zsmalloc-expand-class-bit.patch added to -mm tree akpm
2017-04-13 20:29 akpm
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