This series of patches adds support to configure a cgroup to swap to a particular file by using control file memory.swapfile. Originally, cgroups share system-wide swap space and limiting cgroup swapping is not possible. This patchset solves the problem by adding mechanism that isolates cgroup swap spaces (i.e. per-cgroup swap file) so users can safely enable swap for particular cgroups without worrying about one cgroup uses up all swap space. A value of "default" in memory.swapfile indicates that this cgroup should use the default, system-wide, swap files. A value of "none" indicates that this cgroup should never swap. Other values are interpreted as the path to a private swap file that can only be used by the owner (and its children). The swap file has to be created and swapon() has to be done on it with SWAP_FLAG_PRIVATE, before it can be used. This flag ensures that the swap file is private and does not get used by others. Changelog since v1: - Fixed typos in comment and commit message - Added rationale to this cover letter (Johannes Weiner) Jamie Liu (1): swap: do not store private swap files on swap_list Suleiman Souhlal (2): mm/swap: support per memory cgroup swapfiles swap: Increase the max swap files to 8192 on x86_64 Documentation/cgroups/memory.txt | 15 ++ arch/x86/include/asm/pgtable_64.h | 62 ++++++-- include/linux/memcontrol.h | 2 + include/linux/swap.h | 45 +++--- mm/memcontrol.c | 76 ++++++++++ mm/memory.c | 3 +- mm/shmem.c | 2 +- mm/swap_state.c | 2 +- mm/swapfile.c | 307 +++++++++++++++++++++++++++++++------- mm/vmscan.c | 2 +- 10 files changed, 422 insertions(+), 94 deletions(-) -- 1.9.1.423.g4596e3a -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
