*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: gc.c,v 1.144 2004/12/21 11:18:50 dwmw2 Exp $
+ * $Id: gc.c,v 1.155 2005/11/07 11:14:39 gleixner Exp $
*
*/
#include "nodelist.h"
#include "compr.h"
-static int jffs2_garbage_collect_pristine(struct jffs2_sb_info *c,
+static int jffs2_garbage_collect_pristine(struct jffs2_sb_info *c,
struct jffs2_inode_cache *ic,
struct jffs2_raw_node_ref *raw);
-static int jffs2_garbage_collect_metadata(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+static int jffs2_garbage_collect_metadata(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_inode_info *f, struct jffs2_full_dnode *fd);
-static int jffs2_garbage_collect_dirent(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+static int jffs2_garbage_collect_dirent(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_inode_info *f, struct jffs2_full_dirent *fd);
-static int jffs2_garbage_collect_deletion_dirent(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+static int jffs2_garbage_collect_deletion_dirent(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_inode_info *f, struct jffs2_full_dirent *fd);
static int jffs2_garbage_collect_hole(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_inode_info *f, struct jffs2_full_dnode *fn,
put the clever wear-levelling algorithms. Eventually. */
/* We possibly want to favour the dirtier blocks more when the
number of free blocks is low. */
+again:
if (!list_empty(&c->bad_used_list) && c->nr_free_blocks > c->resv_blocks_gcbad) {
D1(printk(KERN_DEBUG "Picking block from bad_used_list to GC next\n"));
nextlist = &c->bad_used_list;
} else if (n < 50 && !list_empty(&c->erasable_list)) {
- /* Note that most of them will have gone directly to be erased.
+ /* Note that most of them will have gone directly to be erased.
So don't favour the erasable_list _too_ much. */
D1(printk(KERN_DEBUG "Picking block from erasable_list to GC next\n"));
nextlist = &c->erasable_list;
D1(printk(KERN_DEBUG "Picking block from erasable_list to GC next (clean_list and {very_,}dirty_list were empty)\n"));
nextlist = &c->erasable_list;
+ } else if (!list_empty(&c->erasable_pending_wbuf_list)) {
+ /* There are blocks are wating for the wbuf sync */
+ D1(printk(KERN_DEBUG "Synching wbuf in order to reuse erasable_pending_wbuf_list blocks\n"));
+ spin_unlock(&c->erase_completion_lock);
+ jffs2_flush_wbuf_pad(c);
+ spin_lock(&c->erase_completion_lock);
+ goto again;
} else {
/* Eep. All were empty */
D1(printk(KERN_NOTICE "jffs2: No clean, dirty _or_ erasable blocks to GC from! Where are they all?\n"));
printk(KERN_WARNING "Eep. ret->gc_node for block at 0x%08x is NULL\n", ret->offset);
BUG();
}
-
+
/* Have we accidentally picked a clean block with wasted space ? */
if (ret->wasted_size) {
D1(printk(KERN_DEBUG "Converting wasted_size %08x to dirty_size\n", ret->wasted_size));
ret->wasted_size = 0;
}
- D2(jffs2_dump_block_lists(c));
return ret;
}
/* We can't start doing GC yet. We haven't finished checking
the node CRCs etc. Do it now. */
-
+
/* checked_ino is protected by the alloc_sem */
if (c->checked_ino > c->highest_ino) {
printk(KERN_CRIT "Checked all inodes but still 0x%x bytes of unchecked space?\n",
c->unchecked_size);
- D2(jffs2_dump_block_lists(c));
+ jffs2_dbg_dump_block_lists_nolock(c);
spin_unlock(&c->erase_completion_lock);
BUG();
}
case INO_STATE_READING:
/* We need to wait for it to finish, lest we move on
- and trigger the BUG() above while we haven't yet
+ and trigger the BUG() above while we haven't yet
finished checking all its nodes */
D1(printk(KERN_DEBUG "Waiting for ino #%u to finish reading\n", ic->ino));
up(&c->alloc_sem);
}
raw = jeb->gc_node;
-
+
while(ref_obsolete(raw)) {
D1(printk(KERN_DEBUG "Node at 0x%08x is obsolete... skipping\n", ref_offset(raw)));
raw = raw->next_phys;
if (unlikely(!raw)) {
printk(KERN_WARNING "eep. End of raw list while still supposedly nodes to GC\n");
- printk(KERN_WARNING "erase block at 0x%08x. free_size 0x%08x, dirty_size 0x%08x, used_size 0x%08x\n",
+ printk(KERN_WARNING "erase block at 0x%08x. free_size 0x%08x, dirty_size 0x%08x, used_size 0x%08x\n",
jeb->offset, jeb->free_size, jeb->dirty_size, jeb->used_size);
jeb->gc_node = raw;
spin_unlock(&c->erase_completion_lock);
ic = jffs2_raw_ref_to_ic(raw);
/* We need to hold the inocache. Either the erase_completion_lock or
- the inocache_lock are sufficient; we trade down since the inocache_lock
+ the inocache_lock are sufficient; we trade down since the inocache_lock
causes less contention. */
spin_lock(&c->inocache_lock);
switch(ic->state) {
case INO_STATE_CHECKEDABSENT:
- /* It's been checked, but it's not currently in-core.
+ /* It's been checked, but it's not currently in-core.
We can just copy any pristine nodes, but have
to prevent anyone else from doing read_inode() while
we're at it, so we set the state accordingly */
if (ref_flags(raw) == REF_PRISTINE)
ic->state = INO_STATE_GC;
else {
- D1(printk(KERN_DEBUG "Ino #%u is absent but node not REF_PRISTINE. Reading.\n",
+ D1(printk(KERN_DEBUG "Ino #%u is absent but node not REF_PRISTINE. Reading.\n",
ic->ino));
}
break;
case INO_STATE_CHECKING:
case INO_STATE_GC:
/* Should never happen. We should have finished checking
- by the time we actually start doing any GC, and since
- we're holding the alloc_sem, no other garbage collection
+ by the time we actually start doing any GC, and since
+ we're holding the alloc_sem, no other garbage collection
can happen.
*/
printk(KERN_CRIT "Inode #%u already in state %d in jffs2_garbage_collect_pass()!\n",
D1(printk(KERN_DEBUG "jffs2_garbage_collect_pass() waiting for ino #%u in state %d\n",
ic->ino, ic->state));
sleep_on_spinunlock(&c->inocache_wq, &c->inocache_lock);
- /* And because we dropped the alloc_sem we must start again from the
+ /* And because we dropped the alloc_sem we must start again from the
beginning. Ponder chance of livelock here -- we're returning success
without actually making any progress.
- Q: What are the chances that the inode is back in INO_STATE_READING
+ Q: What are the chances that the inode is back in INO_STATE_READING
again by the time we next enter this function? And that this happens
enough times to cause a real delay?
- A: Small enough that I don't care :)
+ A: Small enough that I don't care :)
*/
return 0;
}
/* OK. Now if the inode is in state INO_STATE_GC, we are going to copy the
- node intact, and we don't have to muck about with the fragtree etc.
+ node intact, and we don't have to muck about with the fragtree etc.
because we know it's not in-core. If it _was_ in-core, we go through
all the iget() crap anyway */
if (!ret) {
/* Urgh. Return it sensibly. */
frag->node->raw = f->inocache->nodes;
- }
+ }
if (ret != -EBADFD)
goto upnout;
}
}
goto upnout;
}
-
+
/* Wasn't a dnode. Try dirent */
for (fd = f->dents; fd; fd=fd->next) {
if (fd->raw == raw)
if (ref_obsolete(raw)) {
printk(KERN_WARNING "But it's obsolete so we don't mind too much\n");
} else {
- ret = -EIO;
+ jffs2_dbg_dump_node(c, ref_offset(raw));
+ BUG();
}
}
upnout:
return ret;
}
-static int jffs2_garbage_collect_pristine(struct jffs2_sb_info *c,
+static int jffs2_garbage_collect_pristine(struct jffs2_sb_info *c,
struct jffs2_inode_cache *ic,
struct jffs2_raw_node_ref *raw)
{
/* Ask for a small amount of space (or the totlen if smaller) because we
don't want to force wastage of the end of a block if splitting would
work. */
- ret = jffs2_reserve_space_gc(c, min_t(uint32_t, sizeof(struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN,
- rawlen), &phys_ofs, &alloclen);
+ ret = jffs2_reserve_space_gc(c, min_t(uint32_t, sizeof(struct jffs2_raw_inode) +
+ JFFS2_MIN_DATA_LEN, rawlen), &phys_ofs, &alloclen, rawlen);
+ /* this is not the exact summary size of it,
+ it is only an upper estimation */
+
if (ret)
return ret;
}
break;
default:
- printk(KERN_WARNING "Unknown node type for REF_PRISTINE node at 0x%08x: 0x%04x\n",
+ printk(KERN_WARNING "Unknown node type for REF_PRISTINE node at 0x%08x: 0x%04x\n",
ref_offset(raw), je16_to_cpu(node->u.nodetype));
goto bail;
}
retried = 1;
D1(printk(KERN_DEBUG "Retrying failed write of REF_PRISTINE node.\n"));
-
- ACCT_SANITY_CHECK(c,jeb);
- D1(ACCT_PARANOIA_CHECK(jeb));
- ret = jffs2_reserve_space_gc(c, rawlen, &phys_ofs, &dummy);
+ jffs2_dbg_acct_sanity_check(c,jeb);
+ jffs2_dbg_acct_paranoia_check(c, jeb);
+
+ ret = jffs2_reserve_space_gc(c, rawlen, &phys_ofs, &dummy, rawlen);
+ /* this is not the exact summary size of it,
+ it is only an upper estimation */
if (!ret) {
D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", phys_ofs));
- ACCT_SANITY_CHECK(c,jeb);
- D1(ACCT_PARANOIA_CHECK(jeb));
+ jffs2_dbg_acct_sanity_check(c,jeb);
+ jffs2_dbg_acct_paranoia_check(c, jeb);
goto retry;
}
goto out_node;
}
-static int jffs2_garbage_collect_metadata(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+static int jffs2_garbage_collect_metadata(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_inode_info *f, struct jffs2_full_dnode *fn)
{
struct jffs2_full_dnode *new_fn;
struct jffs2_raw_inode ri;
+ struct jffs2_node_frag *last_frag;
jint16_t dev;
char *mdata = NULL, mdatalen = 0;
- uint32_t alloclen, phys_ofs;
+ uint32_t alloclen, phys_ofs, ilen;
int ret;
if (S_ISBLK(JFFS2_F_I_MODE(f)) ||
S_ISCHR(JFFS2_F_I_MODE(f)) ) {
/* For these, we don't actually need to read the old node */
/* FIXME: for minor or major > 255. */
- dev = cpu_to_je16(((JFFS2_F_I_RDEV_MAJ(f) << 8) |
+ dev = cpu_to_je16(((JFFS2_F_I_RDEV_MAJ(f) << 8) |
JFFS2_F_I_RDEV_MIN(f)));
mdata = (char *)&dev;
mdatalen = sizeof(dev);
D1(printk(KERN_DEBUG "jffs2_garbage_collect_metadata(): Writing %d bites of symlink target\n", mdatalen));
}
-
- ret = jffs2_reserve_space_gc(c, sizeof(ri) + mdatalen, &phys_ofs, &alloclen);
+
+ ret = jffs2_reserve_space_gc(c, sizeof(ri) + mdatalen, &phys_ofs, &alloclen,
+ JFFS2_SUMMARY_INODE_SIZE);
if (ret) {
printk(KERN_WARNING "jffs2_reserve_space_gc of %zd bytes for garbage_collect_metadata failed: %d\n",
sizeof(ri)+ mdatalen, ret);
goto out;
}
-
+
+ last_frag = frag_last(&f->fragtree);
+ if (last_frag)
+ /* Fetch the inode length from the fragtree rather then
+ * from i_size since i_size may have not been updated yet */
+ ilen = last_frag->ofs + last_frag->size;
+ else
+ ilen = JFFS2_F_I_SIZE(f);
+
memset(&ri, 0, sizeof(ri));
ri.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
ri.nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE);
ri.mode = cpu_to_jemode(JFFS2_F_I_MODE(f));
ri.uid = cpu_to_je16(JFFS2_F_I_UID(f));
ri.gid = cpu_to_je16(JFFS2_F_I_GID(f));
- ri.isize = cpu_to_je32(JFFS2_F_I_SIZE(f));
+ ri.isize = cpu_to_je32(ilen);
ri.atime = cpu_to_je32(JFFS2_F_I_ATIME(f));
ri.ctime = cpu_to_je32(JFFS2_F_I_CTIME(f));
ri.mtime = cpu_to_je32(JFFS2_F_I_MTIME(f));
return ret;
}
-static int jffs2_garbage_collect_dirent(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+static int jffs2_garbage_collect_dirent(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_inode_info *f, struct jffs2_full_dirent *fd)
{
struct jffs2_full_dirent *new_fd;
rd.pino = cpu_to_je32(f->inocache->ino);
rd.version = cpu_to_je32(++f->highest_version);
rd.ino = cpu_to_je32(fd->ino);
- rd.mctime = cpu_to_je32(max(JFFS2_F_I_MTIME(f), JFFS2_F_I_CTIME(f)));
+ /* If the times on this inode were set by explicit utime() they can be different,
+ so refrain from splatting them. */
+ if (JFFS2_F_I_MTIME(f) == JFFS2_F_I_CTIME(f))
+ rd.mctime = cpu_to_je32(JFFS2_F_I_MTIME(f));
+ else
+ rd.mctime = cpu_to_je32(0);
rd.type = fd->type;
rd.node_crc = cpu_to_je32(crc32(0, &rd, sizeof(rd)-8));
rd.name_crc = cpu_to_je32(crc32(0, fd->name, rd.nsize));
-
- ret = jffs2_reserve_space_gc(c, sizeof(rd)+rd.nsize, &phys_ofs, &alloclen);
+
+ ret = jffs2_reserve_space_gc(c, sizeof(rd)+rd.nsize, &phys_ofs, &alloclen,
+ JFFS2_SUMMARY_DIRENT_SIZE(rd.nsize));
if (ret) {
printk(KERN_WARNING "jffs2_reserve_space_gc of %zd bytes for garbage_collect_dirent failed: %d\n",
sizeof(rd)+rd.nsize, ret);
return 0;
}
-static int jffs2_garbage_collect_deletion_dirent(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+static int jffs2_garbage_collect_deletion_dirent(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_inode_info *f, struct jffs2_full_dirent *fd)
{
struct jffs2_full_dirent **fdp = &f->dents;
if (ref_totlen(c, NULL, raw) != rawlen)
continue;
- /* Doesn't matter if there's one in the same erase block. We're going to
+ /* Doesn't matter if there's one in the same erase block. We're going to
delete it too at the same time. */
- if ((raw->flash_offset & ~(c->sector_size-1)) ==
- (fd->raw->flash_offset & ~(c->sector_size-1)))
+ if (SECTOR_ADDR(raw->flash_offset) == SECTOR_ADDR(fd->raw->flash_offset))
continue;
D1(printk(KERN_DEBUG "Check potential deletion dirent at %08x\n", ref_offset(raw)));
kfree(rd);
}
+ /* FIXME: If we're deleting a dirent which contains the current mtime and ctime,
+ we should update the metadata node with those times accordingly */
+
/* No need for it any more. Just mark it obsolete and remove it from the list */
while (*fdp) {
if ((*fdp) == fd) {
struct jffs2_raw_inode ri;
struct jffs2_node_frag *frag;
struct jffs2_full_dnode *new_fn;
- uint32_t alloclen, phys_ofs;
+ uint32_t alloclen, phys_ofs, ilen;
int ret;
D1(printk(KERN_DEBUG "Writing replacement hole node for ino #%u from offset 0x%x to 0x%x\n",
f->inocache->ino, start, end));
-
+
memset(&ri, 0, sizeof(ri));
if(fn->frags > 1) {
size_t readlen;
uint32_t crc;
- /* It's partially obsoleted by a later write. So we have to
+ /* It's partially obsoleted by a later write. So we have to
write it out again with the _same_ version as before */
ret = jffs2_flash_read(c, ref_offset(fn->raw), sizeof(ri), &readlen, (char *)&ri);
if (readlen != sizeof(ri) || ret) {
crc = crc32(0, &ri, sizeof(ri)-8);
if (crc != je32_to_cpu(ri.node_crc)) {
printk(KERN_WARNING "jffs2_garbage_collect_hole: Node at 0x%08x had CRC 0x%08x which doesn't match calculated CRC 0x%08x\n",
- ref_offset(fn->raw),
+ ref_offset(fn->raw),
je32_to_cpu(ri.node_crc), crc);
/* FIXME: We could possibly deal with this by writing new holes for each frag */
- printk(KERN_WARNING "Data in the range 0x%08x to 0x%08x of inode #%u will be lost\n",
+ printk(KERN_WARNING "Data in the range 0x%08x to 0x%08x of inode #%u will be lost\n",
start, end, f->inocache->ino);
goto fill;
}
if (ri.compr != JFFS2_COMPR_ZERO) {
printk(KERN_WARNING "jffs2_garbage_collect_hole: Node 0x%08x wasn't a hole node!\n", ref_offset(fn->raw));
- printk(KERN_WARNING "Data in the range 0x%08x to 0x%08x of inode #%u will be lost\n",
+ printk(KERN_WARNING "Data in the range 0x%08x to 0x%08x of inode #%u will be lost\n",
start, end, f->inocache->ino);
goto fill;
}
ri.csize = cpu_to_je32(0);
ri.compr = JFFS2_COMPR_ZERO;
}
+
+ frag = frag_last(&f->fragtree);
+ if (frag)
+ /* Fetch the inode length from the fragtree rather then
+ * from i_size since i_size may have not been updated yet */
+ ilen = frag->ofs + frag->size;
+ else
+ ilen = JFFS2_F_I_SIZE(f);
+
ri.mode = cpu_to_jemode(JFFS2_F_I_MODE(f));
ri.uid = cpu_to_je16(JFFS2_F_I_UID(f));
ri.gid = cpu_to_je16(JFFS2_F_I_GID(f));
- ri.isize = cpu_to_je32(JFFS2_F_I_SIZE(f));
+ ri.isize = cpu_to_je32(ilen);
ri.atime = cpu_to_je32(JFFS2_F_I_ATIME(f));
ri.ctime = cpu_to_je32(JFFS2_F_I_CTIME(f));
ri.mtime = cpu_to_je32(JFFS2_F_I_MTIME(f));
ri.data_crc = cpu_to_je32(0);
ri.node_crc = cpu_to_je32(crc32(0, &ri, sizeof(ri)-8));
- ret = jffs2_reserve_space_gc(c, sizeof(ri), &phys_ofs, &alloclen);
+ ret = jffs2_reserve_space_gc(c, sizeof(ri), &phys_ofs, &alloclen,
+ JFFS2_SUMMARY_INODE_SIZE);
if (ret) {
printk(KERN_WARNING "jffs2_reserve_space_gc of %zd bytes for garbage_collect_hole failed: %d\n",
sizeof(ri), ret);
return 0;
}
- /*
+ /*
* We should only get here in the case where the node we are
* replacing had more than one frag, so we kept the same version
- * number as before. (Except in case of error -- see 'goto fill;'
+ * number as before. (Except in case of error -- see 'goto fill;'
* above.)
*/
D1(if(unlikely(fn->frags <= 1)) {
/* This is a partially-overlapped hole node. Mark it REF_NORMAL not REF_PRISTINE */
mark_ref_normal(new_fn->raw);
- for (frag = jffs2_lookup_node_frag(&f->fragtree, fn->ofs);
+ for (frag = jffs2_lookup_node_frag(&f->fragtree, fn->ofs);
frag; frag = frag_next(frag)) {
if (frag->ofs > fn->size + fn->ofs)
break;
printk(KERN_WARNING "jffs2_garbage_collect_hole: New node has no frags!\n");
BUG();
}
-
+
jffs2_mark_node_obsolete(c, fn->raw);
jffs2_free_full_dnode(fn);
-
+
return 0;
}
{
struct jffs2_full_dnode *new_fn;
struct jffs2_raw_inode ri;
- uint32_t alloclen, phys_ofs, offset, orig_end, orig_start;
+ uint32_t alloclen, phys_ofs, offset, orig_end, orig_start;
int ret = 0;
unsigned char *comprbuf = NULL, *writebuf;
unsigned long pg;
unsigned char *pg_ptr;
-
+
memset(&ri, 0, sizeof(ri));
D1(printk(KERN_DEBUG "Writing replacement dnode for ino #%u from offset 0x%x to 0x%x\n",
if (c->nr_free_blocks + c->nr_erasing_blocks > c->resv_blocks_gcmerge) {
/* Attempt to do some merging. But only expand to cover logically
adjacent frags if the block containing them is already considered
- to be dirty. Otherwise we end up with GC just going round in
- circles dirtying the nodes it already wrote out, especially
+ to be dirty. Otherwise we end up with GC just going round in
+ circles dirtying the nodes it already wrote out, especially
on NAND where we have small eraseblocks and hence a much higher
chance of nodes having to be split to cross boundaries. */
break;
} else {
- /* OK, it's a frag which extends to the beginning of the page. Does it live
+ /* OK, it's a frag which extends to the beginning of the page. Does it live
in a block which is still considered clean? If so, don't obsolete it.
If not, cover it anyway. */
break;
} else {
- /* OK, it's a frag which extends to the beginning of the page. Does it live
+ /* OK, it's a frag which extends to the beginning of the page. Does it live
in a block which is still considered clean? If so, don't obsolete it.
If not, cover it anyway. */
break;
}
}
- D1(printk(KERN_DEBUG "Expanded dnode to write from (0x%x-0x%x) to (0x%x-0x%x)\n",
+ D1(printk(KERN_DEBUG "Expanded dnode to write from (0x%x-0x%x) to (0x%x-0x%x)\n",
orig_start, orig_end, start, end));
- BUG_ON(end > JFFS2_F_I_SIZE(f));
+ D1(BUG_ON(end > frag_last(&f->fragtree)->ofs + frag_last(&f->fragtree)->size));
BUG_ON(end < orig_end);
BUG_ON(start > orig_start);
}
-
+
/* First, use readpage() to read the appropriate page into the page cache */
/* Q: What happens if we actually try to GC the _same_ page for which commit_write()
* triggered garbage collection in the first place?
uint32_t cdatalen;
uint16_t comprtype = JFFS2_COMPR_NONE;
- ret = jffs2_reserve_space_gc(c, sizeof(ri) + JFFS2_MIN_DATA_LEN, &phys_ofs, &alloclen);
+ ret = jffs2_reserve_space_gc(c, sizeof(ri) + JFFS2_MIN_DATA_LEN, &phys_ofs,
+ &alloclen, JFFS2_SUMMARY_INODE_SIZE);
if (ret) {
printk(KERN_WARNING "jffs2_reserve_space_gc of %zd bytes for garbage_collect_dnode failed: %d\n",
ri.usercompr = (comprtype >> 8) & 0xff;
ri.node_crc = cpu_to_je32(crc32(0, &ri, sizeof(ri)-8));
ri.data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen));
-
+
new_fn = jffs2_write_dnode(c, f, &ri, comprbuf, cdatalen, phys_ofs, ALLOC_GC);
jffs2_free_comprbuf(comprbuf, writebuf);
jffs2_gc_release_page(c, pg_ptr, &pg);
return ret;
}
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git://git.onelab.eu / linux-2.6.git / blobdiff