[$] Atomic writes for ext4
Building on the discussion in the two previous sessions on untorn (or
atomic) writes, for buffered I/O and for XFS using direct I/O, Ojaswin Mujoo
remotely led a
session on support for the feature on ext4. That took place in the combined storage and
filesystem track at the
2025 Linux Storage, Filesystem, Memory Management, and BPF Summit. Part of
the support for the feature is already in the upstream kernel, with more
coming. But
ther … ⌘ Read more
[$] Supporting untorn buffered writes
At last year’s
Linux Storage, Filesystem,
Memory-Management, and BPF Summit (LSFMM+BPF), there was a discussion about atomic writes that was
accompanied by patches to support the feature in the block layer, and for
direct I/O on XFS. That
work was merged, but another piece of that discussion concerned adding the
feature for buffered I/O, in part because the PostgreSQL database currently
has to jump through hoops to ensure that its writes are not “torn”
(partial … ⌘ Read more
My counter wasn’t incremented because of a seven year old bug … https://github.com/torvalds/linux/commit/8774cf8 #xfs
My counter wasn’t incremented because of a seven year old bug … https://github.com/torvalds/linux/commit/8774cf8 #xfs
Does cat /proc/fs/xfs/stat | awk ‘/^ig/{print $1}’ == 0 really mean that i’m not using the inode cache?
Does cat /proc/fs/xfs/stat | awk ‘/^ig/{print $1}’ == 0 really mean that i’m not using the inode cache?