While a region mapped with MAP_NORESERVE may segv on a write in low-memory conditions, reading it (as we do during checkpoint) is fine. Remove the VM_NORESERVE flag from CKPT_VMA_NOT_SUPPORTED. --- Oren, what do you think about this? I've tested this lightly with no apparent problems; is there some reason I'm missing to not support MAP_NORESERVE regions? include/linux/checkpoint.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/include/linux/checkpoint.h b/include/linux/checkpoint.h index 84bb7a9..f3e0d11 100644 --- a/include/linux/checkpoint.h +++ b/include/linux/checkpoint.h @@ -301,7 +301,7 @@ extern int restore_memory_contents(struct ckpt_ctx *ctx, struct inode *inode); #define CKPT_VMA_NOT_SUPPORTED \ (VM_IO | VM_HUGETLB | VM_NONLINEAR | VM_PFNMAP | \ - VM_RESERVED | VM_NORESERVE | VM_HUGETLB | VM_NONLINEAR | \ + VM_RESERVED | VM_HUGETLB | VM_NONLINEAR | \ VM_MAPPED_COPY | VM_INSERTPAGE | VM_MIXEDMAP | VM_SAO) /* signals */ -- 1.6.0.2 _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
