Skip to content

R
raspberrypi-kernel

openeuler / raspberrypi-kernel

通知 13
Star 1
Fork 0
R
raspberrypi-kernel
切换分支/标签
  1. 26 10月, 2010 11 次提交
    • E
      fs: allow for more than 2^31 files · 7e360c38
      由 Eric Dumazet 提交于 
      Andrew,

Could you please review this patch, you probably are the right guy to
take it, because it crosses fs and net trees.

Note : /proc/sys/fs/file-nr is a read-only file, so this patch doesnt
depend on previous patch (sysctl: fix min/max handling in
__do_proc_doulongvec_minmax())

Thanks !

[PATCH V4] fs: allow for more than 2^31 files

Robin Holt tried to boot a 16TB system and found af_unix was overflowing
a 32bit value :

<quote>

We were seeing a failure which prevented boot.  The kernel was incapable
of creating either a named pipe or unix domain socket.  This comes down
to a common kernel function called unix_create1() which does:

        atomic_inc(&unix_nr_socks);
        if (atomic_read(&unix_nr_socks) > 2 * get_max_files())
                goto out;

The function get_max_files() is a simple return of files_stat.max_files.
files_stat.max_files is a signed integer and is computed in
fs/file_table.c's files_init().

        n = (mempages * (PAGE_SIZE / 1024)) / 10;
        files_stat.max_files = n;

In our case, mempages (total_ram_pages) is approx 3,758,096,384
(0xe0000000).  That leaves max_files at approximately 1,503,238,553.
This causes 2 * get_max_files() to integer overflow.

</quote>

Fix is to let /proc/sys/fs/file-nr & /proc/sys/fs/file-max use long
integers, and change af_unix to use an atomic_long_t instead of
atomic_t.

get_max_files() is changed to return an unsigned long.
get_nr_files() is changed to return a long.

unix_nr_socks is changed from atomic_t to atomic_long_t, while not
strictly needed to address Robin problem.

Before patch (on a 64bit kernel) :
# echo 2147483648 >/proc/sys/fs/file-max
# cat /proc/sys/fs/file-max
-18446744071562067968

After patch:
# echo 2147483648 >/proc/sys/fs/file-max
# cat /proc/sys/fs/file-max
2147483648
# cat /proc/sys/fs/file-nr
704     0       2147483648
Reported-by: NRobin Holt <holt@sgi.com>
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Acked-by: NDavid Miller <davem@davemloft.net>
Reviewed-by: NRobin Holt <holt@sgi.com>
Tested-by: NRobin Holt <holt@sgi.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      7e360c38
    • J
      isofs: Fix isofs_get_blocks for 8TB files · fde214d4
      由 Jan Kara 提交于 
      Currently isofs_get_blocks() was limited to handle only 4TB files on 32-bit
architectures because of unnecessary use of iblock variable which was signed
long. Just remove the variable. The error messages that were using this
variable should have rather used b_off anyway because that is the block we
are currently mapping.
Signed-off-by: NJan Kara <jack@suse.cz>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      fde214d4
    • C
      fs: kill block_prepare_write · ebdec241
      由 Christoph Hellwig 提交于 
      __block_write_begin and block_prepare_write are identical except for slightly
different calling conventions.  Convert all callers to the __block_write_begin
calling conventions and drop block_prepare_write.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      ebdec241
    • C
      fs: mark destroy_inode static · 56b0dacf
      由 Christoph Hellwig 提交于 
      Hugetlbfs used to need it, but after the destroy_inode and evict_inode
changes it's not required anymore.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      56b0dacf
    • C
      fs: add sync_inode_metadata · c3765016
      由 Christoph Hellwig 提交于 
      Add a new helper to write out the inode using the writeback code,
that is including the correct dirty bit and list manipulation.  A few
of filesystems already opencode this, and a lot of others should be
using it instead of using write_inode_now which also writes out the
data.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      c3765016
    • C
      fs: move permission check back into __lookup_hash · 81fca444
      由 Christoph Hellwig 提交于 
      The caller that didn't need it is gone.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      81fca444
    • L
      Merge branch 'davinci-for-linus' of... · 72e58063
      由 Linus Torvalds 提交于 
      Merge branch 'davinci-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci

* 'davinci-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci: (50 commits)
  davinci: fix remaining board support after io_pgoffst removal
  davinci: mityomapl138: make file local data static
  arm/davinci: remove duplicated include
  davinci: Initial support for Omapl138-Hawkboard
  davinci: MityDSP-L138/MityARM-1808 read MAC address from I2C Prom
  davinci: add tnetv107x touchscreen platform device
  input: add driver for tnetv107x touchscreen controller
  davinci: add keypad config for tnetv107x evm board
  davinci: add tnetv107x keypad platform device
  input: add driver for tnetv107x on-chip keypad controller
  net: davinci_emac: cleanup unused cpdma code
  net: davinci_emac: switch to new cpdma layer
  net: davinci_emac: separate out cpdma code
  net: davinci_emac: cleanup unused mdio emac code
  omap: cleanup unused davinci mdio arch code
  davinci: cleanup mdio arch code and switch to phy_id
  net: davinci_emac: switch to new mdio
  omap: add mdio platform devices
  davinci: add mdio platform devices
  net: davinci_emac: separate out davinci mdio
  ...

Fix up trivial conflict in drivers/input/keyboard/Kconfig (two entries
added next to each other - one from the davinci merge, one from the
input merge)
      72e58063
    • L
      Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd · 57c155d5
      由 Linus Torvalds 提交于 
      * 'for-linus' of git://git.open-osd.org/linux-open-osd:
  exofs: Remove inode->i_count manipulation in exofs_new_inode
  fs/exofs: typo fix of faild to failed
  exofs: Set i_mapping->backing_dev_info anyway
  exofs: Cleaup read path in regard with read_for_write
      57c155d5
    • B
      x86-32, mm: Remove duplicated include · 9afd281a
      由 Borislav Petkov 提交于 
      Commit b40827fa ("x86-32, mm: Add an initial page table for core
bootstrapping") added an include directive which is needless and is
taken care of by a previous one.  Remove it.
Caught-by: NJaswinder Singh Rajput <jaswinderlinux@gmail.com>
Signed-off-by: NBorislav Petkov <bp@alien8.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      9afd281a
    • B
      exofs: Remove inode->i_count manipulation in exofs_new_inode · fe2fd9ed
      由 Boaz Harrosh 提交于 
      exofs_new_inode() was incrementing the inode->i_count and
decrementing it in create_done(), in a bad attempt to make sure
the inode will still be there when the asynchronous create_done()
finally arrives. This was very stupid because iput() was not called,
and if it was actually needed, it would leak the inode.

However all this is not needed, because at exofs_evict_inode()
we already wait for create_done() by waiting for the
object_created event. Therefore remove the superfluous ref counting
and just Thicken the comment at exofs_evict_inode() a bit.

While at it change places that open coded wait_obj_created()
to call the already available wrapper.

CC: Dave Chinner <dchinner@redhat.com>
CC: Christoph Hellwig <hch@lst.de>
CC: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
      fe2fd9ed
    • J
      fs/exofs: typo fix of faild to failed · 571f7f46
      由 Joe Perches 提交于 
      Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
      571f7f46
  3. 25 10月, 2010 29 次提交