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Chris Mason 89ce8a63d0 Add btrfs_end_transaction_throttle to force writers to wait for pending commits The existing throttle mechanism was often not sufficient to prevent new writers from coming in and making a given transaction run forever. This adds an explicit wait at the end of most operations so they will allow the current transaction to close. There is no wait inside file_write, inode updates, or cow filling, all which have different deadlock possibilities. This is a temporary measure until better asynchronous commit support is added. This code leads to stalls as it waits for data=ordered writeback, and it really needs to be fixed. Signed-off-by: Chris Mason <chris.mason@oracle.com>	History 2008-09-25 11:04:03 -04:00
fs/btrfs	Add btrfs_end_transaction_throttle to force writers to wait for pending commits	2008-09-25 11:04:03 -04:00

Chris Mason 89ce8a63d0 Add btrfs_end_transaction_throttle to force writers to wait for pending commits

The existing throttle mechanism was often not sufficient to prevent
new writers from coming in and making a given transaction run forever.
This adds an explicit wait at the end of most operations so they will
allow the current transaction to close.

There is no wait inside file_write, inode updates, or cow filling, all which
have different deadlock possibilities.

This is a temporary measure until better asynchronous commit support is
added.  This code leads to stalls as it waits for data=ordered
writeback, and it really needs to be fixed.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

History

2008-09-25 11:04:03 -04:00

fs/btrfs

Add btrfs_end_transaction_throttle to force writers to wait for pending commits

2008-09-25 11:04:03 -04:00