On Thursday 14 Apr 2016 19:08:09 Chandan Rajendra wrote: > Btrfs assumes block size to be the same as the machine's page > size. This would mean that a Btrfs instance created on a 4k page size > machine (e.g. x86) will not be mountable on machines with larger page > sizes (e.g. PPC64/AARCH64). This patchset aims to resolve this > incompatibility. > > This patchset continues with the work posted previously at > http://thread.gmane.org/gmane.comp.file-systems.btrfs/53073. > > I have reverted the upstream commit "btrfs: fix lockups from > btrfs_clear_path_blocking" (f82c458a2c3ffb94b431fc6ad791a79df1b3713e) > since this led to soft-lockups when the patch "Btrfs: > subpagesize-blocksize: Prevent writes to an extent buffer when > PG_writeback flag is set" is applied. During 2015's Vault Conference > Btrfs meetup, Chris Mason had suggested that he will write up a > suitable locking function to be used when writing dirty pages that map > metadata blocks. Until we have a suitable locking function available, > this patchset temporarily disables the commit > f82c458a2c3ffb94b431fc6ad791a79df1b3713e. > > The commits for the Btrfs kernel module can be found at > https://github.com/chandanr/linux/tree/btrfs/subpagesize-blocksize. > > To create a filesystem with block size < page size, a patched version > of the Btrfs-progs package is required. The corresponding fixes for > Btrfs-progs can be found at > https://github.com/chandanr/btrfs-progs/tree/btrfs/subpagesize-blocksize. > > Fstests run status: > 1. x86_64 > - With 4k sectorsize, all the tests that succeed with the master > branch at git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git > branch also do so with the patches applied. > 2. ppc64 > - With 4k sectorsize, 16k nodesize and with "nospace_cache" mount > option, except for scrub and compression tests, all the tests > that succeed with the master branch at > git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git > branch also do so with the patches applied. > - With 64k sectorsize & nodesize, all the tests that succeed with > the master branch at > git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git > branch also do so with the patches applied. > > TODO: > 1. The selftests code needs to be fixed to work in subpage-blocksize > scenario. > 2. I am planning to fix Scrub & Compression via a separate patchset. > Hi, I had messed up the following four patches during rebase operations. [PATCH] Btrfs: subpage-blocksize: btrfs_punch_hole: Fix uptodate blocks check [PATCH] Btrfs: subpage-blocksize: Define extent_buffer_head. [PATCH] Btrfs: subpage-blocksize: Make sure delalloc range intersects with the locked page's range [PATCH] Btrfs: subpage-blocksize: Prevent writes to an extent buffer when PG_writeback flag is set Instead of sending the complete patchset once again, I have resent only the above listed patches as replies to the corresponding mails. Please use the new patches instead of the corresponding old ones. -- chandan -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
