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SubjectRe: [PATCH 0/8] mm/swap: fix some rare issues in swap subsystem
On Mon, Jan 27, 2014 at 06:00:03PM +0800, Weijie Yang wrote:
> This patch series focus on some tiny and rare issues in swap subsystem.
> These issues happen rarely, so it is just for the correctness of the code.
>
> It firstly add some comments to try to make swap flag/lock usage in
> swapfile.c more clear and readable,
> and fix some rare issues in swap subsystem that cause race condition among
> swapon, swapoff and frontswap_register_ops.
> and fix some not race issues.
>
> Please see individual patch for details, any complaint and suggestion
> are welcome.
>
> Regards
>
> patch 1/8: add some comments for swap flag/lock usage
>
> patch 2/8: fix race on swap_info reuse between swapoff and swapon
> This patch has been in akpm -mm tree, however I improve it according
> to Heesub Shin and Mateusz Guzik's suggestion. So, that old patch need
> to be dropped.
>
> patch 3/8: prevent concurrent swapon on the same S_ISBLK blockdev
>
> patch 4/8: fix race among frontswap_register_ops, swapoff and swapon
>
> patch 5/8: drop useless and bug frontswap_shrink codes
>
> patch 6/8: remove swap_lock to simplify si_swapinfo()
>
> patch 7/8: check swapfile blocksize greater than PAGE_SIZE
>
> patch 8/8: add missing handle on a dup-store failure
>
> include/linux/blkdev.h | 4 +++-
> include/linux/frontswap.h | 2 --
> include/linux/swapfile.h | 4 +---
> mm/frontswap.c | 127 +++++++------------------------------------------------------------------------------------------------------------------------
> mm/page_io.c | 2 ++
> mm/rmap.c | 2 +-
> mm/swapfile.c | 138 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----------------------------------------
> 7 files changed, 112 insertions(+), 167 deletions(-)


<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree. Please read Documentation/stable_kernel_rules.txt
for how to do this properly.

</formletter>


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