Make `:verbose set ...` show when an option was last modified by an
API client or Lua script/chunk. In the case of an API client, the
channel ID is displayed.
After this change we never release blocks from memory (in practice it
never happened because the memory limits are never reached). Let the OS
take care of that.
---
On today's systems the 'maxmem' and 'maxmemtot' values are huge (4+ GB)
so the limits are never reached in practice, but Vim wastes a lot of
time checking if the limit was reached.
If the limit is reached Vim starts saving pieces of the swap file that were in
memory to the disk. Said in a different way: Vim implements its own
memory-paging mechanism. This is unnecessary and inefficient since the
operating system already has virtual memory and will swap to the disk if
programs start using too much memory.
This change does...
1. Reduce the number of config options and need for documentation.
2. Make the code more efficient as we don't have to keep track of memory
usage nor check if the memory limits were reached to start swapping
to disk every time we need memory for buffers.
3. Simplify the code. Once memfile.c is simple enough it could be
replaced by actual operating system memory mapping (mmap,
MemoryViewOfFile...). This change does not prevent Vim to recover
changes from swap files since the swapping code is never triggered
with the huge limits set by default.
Some terminals don't report which buttons are involved in some mouse
events. For example, the urxvt protocol
(http://www.huge-man-linux.net/man7/urxvt.html section "Mouse
reporting") does not report which button has been released.
In this case libtermkey reports button 0
(http://www.leonerd.org.uk/code/libtermkey/doc/termkey_interpret_mouse.3.html)
Up to now, forward_mouse_event did not handle button==0.
On press events there is not much we can do, and we keep the
current behavior which is dropping the event. But on drag-and-release
events we can compensate by remembering the last button pressed.
fixes#3182 for urxvt
fixes#5400
While warning is technically true (cannot enter this case with `state->c`
greater then NFA_Z…9) it makes condition less readable and relies on knownledge
of enum internal structure.
ref #6725
fsync() is very slow on some systems. And since the parent commit, Nvim
is smarter about flushing files at certain times (e.g. CursorHold),
regardless of whether 'fsync' is enabled. So it's less risky to disable
'fsync'.
Profiling showed slow (2-4s) :write and :quit caused by fsync():
:quit
shada_write_file(NULL, false);
:write + fsync
0 0x00007f72da567b2d in fsync () at ../sysdeps/unix/syscall-template.S:84
1 0x0000000000638970 in uv__fs_fsync (req=<optimized out>) at /home/vagrant/neovim/.deps/build/src/libuv/src/unix/fs.c:150
2 uv__fs_work (w=<optimized out>) at /home/vagrant/neovim/.deps/build/src/libuv/src/unix/fs.c:953
3 0x0000000000639a70 in uv_fs_fsync (loop=<optimized out>, req=<optimized out>, file=41, cb=0x7f72da567b2d <fsync+45>)
at /home/vagrant/neovim/.deps/build/src/libuv/src/unix/fs.c:1094
4 0x0000000000573694 in os_fsync (fd=41) at ../src/nvim/os/fs.c:631
5 0x00000000004ec9dc in buf_write (buf=<optimized out>, fname=<optimized out>, sfname=<optimized out>, start=1, end=1997, eap=0x7fffc864c570,
append=<optimized out>, forceit=<optimized out>, reset_changed=<optimized out>, filtering=<optimized out>) at ../src/nvim/fileio.c:3387
6 0x00000000004b44ff in do_write (eap=0x7fffc864c570) at ../src/nvim/ex_cmds.c:1745
...
:write + nofsync
0 0x00007f72da567b2d in fsync () at ../sysdeps/unix/syscall-template.S:84
1 0x0000000000638970 in uv__fs_fsync (req=<optimized out>) at /home/vagrant/neovim/.deps/build/src/libuv/src/unix/fs.c:150
2 uv__fs_work (w=<optimized out>) at /home/vagrant/neovim/.deps/build/src/libuv/src/unix/fs.c:953
3 0x0000000000639a70 in uv_fs_fsync (loop=<optimized out>, req=<optimized out>, file=36, cb=0x7f72da567b2d <fsync+45>)
at /home/vagrant/neovim/.deps/build/src/libuv/src/unix/fs.c:1094
4 0x0000000000573694 in os_fsync (fd=36) at ../src/nvim/os/fs.c:631
5 0x0000000000528f5a in mf_sync (mfp=0x7f72d8968d00, flags=5) at ../src/nvim/memfile.c:466
6 0x000000000052d569 in ml_preserve (buf=0x7f72d890f000, message=0) at ../src/nvim/memline.c:1659
7 0x00000000004ebadf in buf_write (buf=<optimized out>, fname=<optimized out>, sfname=<optimized out>, start=1, end=1997, eap=0x7fffc864c570,
append=<optimized out>, forceit=<optimized out>, reset_changed=<optimized out>, filtering=<optimized out>) at ../src/nvim/fileio.c:3071
8 0x00000000004b44ff in do_write (eap=0x7fffc864c570) at ../src/nvim/ex_cmds.c:1745
...
