search for: is_immut

...d the store though: %p = unaliased address store 42, %p call void @llvm.assert_immutable(%p) %val = 42 because *if* assert_immutable does not unwind, %val will see the dominating store, because assert_immutable is readonly. Again, %p1 = ... %p2 = llvm.safe_cast %p1 %a = select i1 %is_immutable, %p1, %p2 load %a !invariant could become %p1 = ... if (not %is_immutable) { call llvm.assert_immutable(%p1) } load %p1 or, if we wish to reduce control flow, we could define `llvm.assert_immutable` to be a no-op on null: %p1 = ... %a = select i1 %is_immutable, null, %p1,...

On 09/28/2014 01:22 AM, Hal Finkel wrote: > ----- Original Message ----- >> From: "Philip Reames" <listmail at philipreames.com> >> To: llvmdev at cs.uiuc.edu >> Cc: "Hal Finkel" <hfinkel at anl.gov>, nicholas at mxc.ca >> Sent: Wednesday, September 10, 2014 12:11:28 AM >> Subject: Optimization hints for "constant" loads

...G_ON(victim->d_parent->d_inode != dir); + audit_inode_child(victim, dir); + + error = inode_permission(dir, MAY_WRITE | MAY_EXEC); + if (error) + return error; + if (IS_APPEND(dir)) + return -EPERM; + if (btrfs_check_sticky(dir, victim->d_inode)|| + IS_APPEND(victim->d_inode)|| + IS_IMMUTABLE(victim->d_inode) || IS_SWAPFILE(victim->d_inode)) + return -EPERM; + if (isdir) { + if (!S_ISDIR(victim->d_inode->i_mode)) + return -ENOTDIR; + if (IS_ROOT(victim)) + return -EBUSY; + } else if (S_ISDIR(victim->d_inode->i_mode)) + return -EISDIR; + if (IS_DEADDIR(dir))...

...e, const void *value, size_t value_len, - int flags) -{ - int free1 = -1, free2 = -1; - int err, where = 0, total; - int name_len; - - ea_idebug(inode, "name=%d.%s, value=%p, value_len=%ld", - name_index, name, value, (long)value_len); - - if (IS_RDONLY(inode)) - return -EROFS; - if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) - return -EPERM; - if (value == NULL) - value_len = 0; - if (name == NULL) - return -EINVAL; - name_len = strlen(name); - if (name_len > 255 || value_len > inode->i_sb->s_blocksize) - return -ERANGE; - down_write(&EXT3_I(inode)->xattr_sem); - -...

i_alloc_sem has always been a bit of an odd "lock". It''s the only remaining rw_semaphore that can be released by a different thread than the one that locked it, and it''s use case in the core direct I/O code is more like a counter given that the writers already have external serialization. This series removes it in favour of a simpler counter scheme, thus getting rid

Hi everyone, I described the reflink operation at the Linux Storage & Filesystems Workshop last month. Originally implemented as an ocfs2-specific ioctl, the consensus was that it should be a syscall from the get-go. Here's some first-cut patches. For people who have not seen reflink, either at LSF or on the ocfs2 wiki, the first patch contains Documentation/filesystems/reflink.txt to

Hi all, So I have finally finished the v1 of reflink for ocfs2. It has some bugs that I am still investigating, but the schema is almost there. So I'd like to send it out first for review. And Tristan and I will continue to work on the stability of the code. The general information for reflink, please see http://oss.oracle.com/osswiki/OCFS2/DesignDocs/Reflink. For the design doc, please

Hi all, Change from v1 to v2: bug fix and metadata/credits reservation improvement. The general information for reflink, please see http://oss.oracle.com/osswiki/OCFS2/DesignDocs/Reflink. For the design doc, please see http://oss.oracle.com/osswiki/OCFS2/DesignDocs/RefcountTrees http://oss.oracle.com/osswiki/OCFS2/DesignDocs/ReflinkOperation

Hi all, So I have finally finished the v3 of reflink for ocfs2. The biggest change is that we support 64bit cluster offset now(Thank Mark and Joel for it). [View] http://oss.oracle.com/git/?p=tma/linux-2.6.git;a=shortlog;h=refcount [Pull] git://oss.oracle.com/git/tma/linux-2.6.git refcount The general information for reflink, please see http://oss.oracle.com/osswiki/OCFS2/DesignDocs/Reflink.