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[STACKED on #1431] libext: ext4 sequential-read performance (read-ahead + async prefetch) #1447

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[STACKED on #1431] libext: ext4 sequential-read performance (read-ahead + async prefetch) #1447

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4390a95
libext: real fsync + page-cache bridge for ext2/3/4
gburd Jul 12, 2026
cea5adf
libext: set inode deletion time so deleted files fsck clean
gburd Jul 12, 2026
920f588
tests: add ext4 read/write throughput benchmark (D2.3)
gburd Jul 13, 2026
ea71139
libext: read/write directly into user buffer, skip bounce copy
gburd Jul 13, 2026
e2c2170
libext: sequential read-ahead cache for ext4 reads
gburd Jul 13, 2026
a6c33cf
libext: async double-buffered read-ahead for ext4 sequential reads
gburd Jul 13, 2026
2292f01
copyright: correct new-file attribution to the actual author
gburd Jul 14, 2026
02a5d53
libext: deep multi-window prefetch ring for ext4 sequential reads
gburd Jul 14, 2026
3e8cfd5
libext: tune prefetch ring to N=4/M=4 from a device-queue-depth sweep
gburd Jul 14, 2026
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1 change: 1 addition & 0 deletions .gitignore
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Expand Up @@ -53,3 +53,4 @@ modules/dl_tests/usr.manifest
compile_commands.json
downloaded_packages
.firecracker
ext_images/
2 changes: 1 addition & 1 deletion modules/libext/Makefile
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Expand Up @@ -3,7 +3,7 @@ include ../common.gmk
module_out := $(out)/modules/libext

CXXFLAGS = -fPIC -std=gnu++11 $(INCLUDES) -I../lwext4/upstream/lwext4/include -I../lwext4/upstream/lwext4/build_lib_only/include \
-D_KERNEL -D_GNU_SOURCE -Wall -fno-exceptions -fno-rtti -O2
-D_KERNEL -D_GNU_SOURCE -Wall -fno-exceptions -fno-rtti -O2 $(RA_FLAGS)

# the build target executable:
TARGET = libext
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