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Linux: 2.6.32 - Adapt to writeback changes

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Adapt to the writeback changes in kernel 2.6.32
- Since we define our own backing_dev, it needs to be registered with
the writeback code and attached to the super_block.  Otherwise it
might get ignored when writeback is needed.
- Each backing_dev now gets its own kernel thread.  The name of the
thread is based on the registered name - the openafs one will appear
as "flush-afs".

Reviewed-on: http://gerrit.openafs.org/574
Tested-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
This commit is contained in:
Marc Dionne 2009-09-17 16:57:52 -04:00 committed by Derrick Brashear
parent fa8766d220
commit db23268f68
3 changed files with 21 additions and 0 deletions
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1
acinclude.m4
View File

@ -904,6 +904,7 @@ case $AFS_SYSNAME in *_linux* | *_umlinux*)
LINUX_DEFINES_FOR_EACH_PROCESS
LINUX_DEFINES_PREV_TASK
LINUX_FS_STRUCT_SUPER_HAS_ALLOC_INODE
LINUX_STRUCT_SUPER_BLOCK_HAS_S_BDI
LINUX_FS_STRUCT_ADDRESS_SPACE_HAS_PAGE_LOCK
LINUX_FS_STRUCT_ADDRESS_SPACE_HAS_GFP_MASK
LINUX_FS_STRUCT_INODE_HAS_I_ALLOC_SEM

5
src/afs/LINUX/osi_vfsops.c
View File

@ -108,6 +108,11 @@ afs_fill_super(struct super_block *sb, void *data, int silent)
#if defined(HAVE_BDI_INIT)
bdi_init(&afs_backing_dev_info);
#endif
#if defined (STRUCT_SUPER_BLOCK_HAS_S_BDI)
sb->s_bdi = &afs_backing_dev_info;
/* The name specified here will appear in the flushing thread name - flush-afs */
bdi_register(&afs_backing_dev_info, NULL, "afs");
#endif
#if !defined(AFS_NONFSTRANS)
sb->s_export_op = &afs_export_ops;
#endif

15
src/cf/linux-test4.m4
View File

@ -1289,3 +1289,18 @@ AC_DEFUN([LINUX_KEYS_HAVE_SESSION_TO_PARENT], [
if test "x$ac_cv_linux_have_session_to_parent" = "xyes"; then
AC_DEFINE([HAVE_SESSION_TO_PARENT], 1, [define if keyctl has the KEYCTL_SESSION_TO_PARENT function])
fi])
AC_DEFUN([LINUX_STRUCT_SUPER_BLOCK_HAS_S_BDI], [
AC_MSG_CHECKING([if struct super_block has s_bdi])
AC_CACHE_VAL([ac_cv_linux_struct_super_block_has_s_bdi], [
AC_TRY_KBUILD(
[#include <linux/fs.h>],
[struct super_block _sb;
_sb.s_bdi= NULL;],
ac_cv_linux_struct_super_block_has_s_bdi=yes,
ac_cv_linux_struct_super_block_has_s_bdi=no)])
AC_MSG_RESULT($ac_cv_linux_struct_super_block_has_s_bdi)
if test "x$ac_cv_linux_struct_super_block_has_s_bdi" = "xyes"; then
AC_DEFINE([STRUCT_SUPER_BLOCK_HAS_S_BDI], 1, [define if struct super_block has an s_bdi member])
fi])