Messages in this thread | | | Date | Fri, 01 Apr 2011 14:12:58 +0200 | From | Peter Zijlstra <> | Subject | [PATCH 00/20] mm: Preemptibility -v10 |
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Another -rc1, another posting.
Rework the existing mmu_gather infrastructure.
The direct purpose of these patches was to allow preemptible mmu_gather, but even without that I think these patches provide an improvement to the status quo.
The first 9 patches rework the mmu_gather infrastructure. For review purpose I've split them into generic and per-arch patches with the last of those a generic cleanup.
Also provided is a rollup of these patches, which is used as a commit in the git tree referenced below.
The next patch provides generic RCU page-table freeing, and the follow up is a patch converting s390 to use this. I've also got 4 patches from DaveM lined up (not included in this series) that uses this to implement gup_fast() for sparc64.
Then there is one patch that extends the generic mmu_gather batching.
After that follow the mm preemptibility patches, these make part of the mm a lot more preemptible. It converts i_mmap_lock and anon_vma->lock to mutexes which together with the mmu_gather rework makes mmu_gather preemptible as well.
Making i_mmap_lock a mutex also enables a clean-up of the truncate code.
This also allows for preemptible mmu_notifiers, something that XPMEM I think wants.
Furthermore, it removes the new and universially detested unmap_mutex.
git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-mmu_gather.git
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