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Dave Chinner 90810b9e82 xfs: push stale, pinned buffers on trylock failures ... As reported by Nick Piggin, XFS is suffering from long pauses under highly concurrent workloads when hosted on ramdisks. The problem is that an inode buffer is stuck in the pinned state in memory and as a result either the inode buffer or one of the inodes within the buffer is stopping the tail of the log from being moved forward. The system remains in this state until a periodic log force issued by xfssyncd causes the buffer to be unpinned. The main problem is that these are stale buffers, and are hence held locked until the transaction/checkpoint that marked them state has been committed to disk. When the filesystem gets into this state, only the xfssyncd can cause the async transactions to be committed to disk and hence unpin the inode buffer. This problem was encountered when scaling the busy extent list, but only the blocking lock interface was fixed to solve the problem. Extend the same fix to the buffer trylock operations - if we fail to lock a pinned, stale buffer, then force the log immediately so that when the next attempt to lock it comes around, it will have been unpinned. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>		14 years ago
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kmem.c	…
kmem.h	…
mrlock.h	…
sv.h	…
time.h	…
xfs_acl.c	…
xfs_aops.c	xfs: fix failed write truncation handling.	14 years ago
xfs_aops.h	…
xfs_buf.c	xfs: push stale, pinned buffers on trylock failures	14 years ago
xfs_buf.h	Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs	15 years ago
xfs_export.c	…
xfs_export.h	…
xfs_file.c	…
xfs_fs_subr.c	xfs: use range primitives for xfs page cache operations	15 years ago
xfs_globals.c	xfs: remove xfs_cred.h	15 years ago
xfs_ioctl.c	xfs: xfs_ioctl: fix information leak to userland	14 years ago
xfs_ioctl.h	…
xfs_ioctl32.c	xfs: Extend project quotas to support 32bit project ids	15 years ago
xfs_ioctl32.h	xfs: Extend project quotas to support 32bit project ids	15 years ago
xfs_iops.c	xfs: use hlist_add_fake	14 years ago
xfs_iops.h	…
xfs_linux.h	xfs: Extend project quotas to support 32bit project ids	15 years ago
xfs_quotaops.c	…
xfs_stats.c	…
xfs_stats.h	…
xfs_super.c	xfs: remove experimental tag from the delaylog option	14 years ago
xfs_super.h	xfs: remove xfs_version.h	15 years ago
xfs_sync.c	xfs: fix per-ag reference counting in inode reclaim tree walking	14 years ago
xfs_sync.h	xfs: implement batched inode lookups for AG walking	15 years ago
xfs_sysctl.c	…
xfs_sysctl.h	…
xfs_trace.c	…
xfs_trace.h	Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs	15 years ago
xfs_vnode.h	…
xfs_xattr.c	…