RepoMirrors/btrfs-progs
1
0
Fork 0
mirror of https://github.com/kdave/btrfs-progs synced 2025-04-07 01:31:17 +00:00
Code Issues Packages Projects Releases Wiki Activity

Clear caches when opening and closing devices

Browse Source 
This should fix problems with cache aliases in the kernel
This commit is contained in:
Chris Mason 2013-02-01 10:44:22 -05:00
parent 6cd836d7d9
commit 8fe354744c
2 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
disk-io.c
View File

@ -641,6 +641,9 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path,
if (sb_bytenr == 0)
sb_bytenr = BTRFS_SUPER_INFO_OFFSET;
/* try to drop all the caches */
posix_fadvise(fp, 0, 0, POSIX_FADV_DONTNEED);
ret = btrfs_scan_one_device(fp, path, &fs_devices,
&total_devs, sb_bytenr);
@ -1091,6 +1094,10 @@ static int close_all_devices(struct btrfs_fs_info *fs_info)
list = &fs_info->fs_devices->devices;
list_for_each(next, list) {
device = list_entry(next, struct btrfs_device, dev_list);
if (device->fd) {
fsync(device->fd);
posix_fadvise(device->fd, 0, 0, POSIX_FADV_DONTNEED);
}
close(device->fd);
}
return 0;

2
volumes.c
View File

@ -176,6 +176,8 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, int flags)
goto fail;
}
posix_fadvise(fd, 0, 0, POSIX_FADV_DONTNEED);
if (device->devid == fs_devices->latest_devid)
fs_devices->latest_bdev = fd;
if (device->devid == fs_devices->lowest_devid)